MCQs 7dd For Final Exam

Reviewed by Editorial Team
The ProProfs editorial team is comprised of experienced subject matter experts. They've collectively created over 10,000 quizzes and lessons, serving over 100 million users. Our team includes in-house content moderators and subject matter experts, as well as a global network of rigorously trained contributors. All adhere to our comprehensive editorial guidelines, ensuring the delivery of high-quality content.
Learn about Our Editorial Process
| By Raksmey Pich
R
Raksmey Pich
Community Contributor
Quizzes Created: 1 | Total Attempts: 403
| Attempts: 403 | Questions: 200
Please wait...
Question 1 / 200
0 %
0/100
Score 0/100
1. In which one of the following, vesicles and bullae are not seen

Explanation

Vesicles and bullae are fluid-filled blisters that are commonly seen in various skin conditions. Lupus erythematosus is an autoimmune disease that primarily affects the skin, causing a characteristic rash but does not typically present with vesicles or bullae. On the other hand, pemphigus, herpes zoster, and herpes simplex are all known to cause vesicles and bullae as part of their clinical presentation.

Submit
Please wait...
About This Quiz
Oral Surgery Quizzes & Trivia

This quiz titled 'MCQs 7DD For Final Exam' covers key topics in oral surgery, focusing on procedures like tooth extraction, flap design, and tissue management.

Personalize your quiz and earn a certificate with your name on it!
2. The MOST COMMON problem arising from premature extraction of deciduous molars is the loss of ?

Explanation

Premature extraction of deciduous molars can lead to the loss of arch length. Deciduous molars play a crucial role in maintaining space for permanent teeth. When they are extracted prematurely, the adjacent teeth may drift into the empty space, causing crowding and a decrease in arch length. This can lead to orthodontic problems and the need for further treatment to correct the misalignment of teeth. Facial contour, vertical height, and sibilant speech sounds are not directly affected by the premature extraction of deciduous molars.

Submit
3. នៅលើ Maxilla តើធ្មេញមួយណាដែល ដុះលានឆ្លងកាត់ឆ្អឹងក្រអូម ហើយបង្ហាញហាក់បីដូចជាមាន palatal abscess នៅក្រអូមមាត់ 1. ធ្មេញមុខទីពីរ (lateral incisor) 2. ថ្គាមតូចទីមួយ (first premolar) 3. ថ្គាមធំទីមួយ (first molar) 4. ធ្មេញមុខទីមួយ (central incisor) 5. ថ្គាមធំទីបី (third molar)"?

Explanation

The correct answer is (1) and (3) because the question states that there is a palatal abscess on the maxilla. The maxilla is the upper jaw, and the palatal region refers to the roof of the mouth. The lateral incisor (ធ្មេញមុខទីពីរ) and the first molar (ថ្គាមធំទីមួយ) are both located on the maxilla and in the palatal region, making them the most likely teeth to be affected by the abscess. Therefore, the correct answer is (1) and (3).

Submit
4. អ្នកជំងឺម្នាក់ដែលប្រើប្រាស់ថ្នាំ Cortico-steroid ព្យាបាលរយៈពេលយូរ រហូតមកដល់បច្ចុប្បន្នអាចបណ្តាល៖?

Explanation

The correct answer is "បន្ថយភាពធន់ទ្រាំទៅនឹងភាពតានតឹងសរីរាង្គ" which translates to "Improve resistance to stress". Cortico-steroids are known to have anti-inflammatory and immunosuppressive effects, which can help the body cope with stress and reduce inflammation. This can lead to an improvement in the body's ability to handle stress and maintain homeostasis.

Submit
5. Occlusal disease is the deformation or disturbances of function of any structure with in the masticatory system that are in disequilibrium with a harmonious interrelationship between:

Explanation

Occlusal disease refers to any deformation or disturbances in the masticatory system that are not in harmony with the interrelationship between the TMJs (temporomandibular joints), masticatory muscles, and occluding surface of the teeth. This means that there is an imbalance or dysfunction in the way these structures work together, leading to issues such as misalignment, grinding, or clenching of the teeth. The other options do not accurately describe the interrelationship and components involved in occlusal disease.

Submit
6. Proximal caries confined to enamel:?

Explanation

The correct answer is Prevention. This means that when proximal caries are confined to the enamel, the best course of action is to focus on preventing further decay. This can be done through proper oral hygiene practices, such as regular brushing and flossing, as well as regular dental check-ups and cleanings. By preventing the progression of caries in the enamel, more invasive treatments like restoration with G I can be avoided.

Submit
7. Secondary dentine occur due to:?

Explanation

Secondary dentine can occur due to various factors, including occlusal trauma, recurrent caries, and attrition dentine. Occlusal trauma refers to excessive forces on the teeth during biting and chewing, which can lead to the formation of secondary dentine as a protective mechanism. Recurrent caries, which is the development of new cavities around existing dental restorations, can also stimulate the formation of secondary dentine. Additionally, attrition dentine, which is the wearing down of tooth structure due to friction and grinding, can trigger the deposition of secondary dentine. Therefore, all of the listed factors can contribute to the occurrence of secondary dentine.

Submit
8. Old patient came to replace all old amalgam filling he had sever occlusal attrition the best replacement is:?

Explanation

The best replacement for the old amalgam fillings in a patient with severe occlusal attrition would be full crowns. Full crowns provide better coverage and protection for the heavily worn teeth, as they cover the entire tooth surface. Composite fillings may not be strong enough to withstand the forces of occlusion in this case. Amalgam fillings may not provide adequate coverage and may not be aesthetically pleasing. Cast metal restorations may be an option, but full crowns would be a more conservative and esthetic choice.

Submit
9. តើវិធីណាមួយដែលគួរប្រើដើម្បីកាត់បន្ថយគ្រោះថ្នាក់នៃការប៉ះទៅនឹងចំហាយបារ៉ត (mercury vapour) 1. ការអប់រំដល់បុគ្គលិក 2. ការប្រើរបាំងប្លាស្ទិក (Rubber dam) 3. ការបឺតស្រូបយ៉ាងរហ័ស 4. ម៉ាស់ពាក់

Explanation

The correct answer is (1) and (3) because providing ventilation to the employees and eliminating sources of mercury vapor are effective ways to reduce exposure. Using a rubber dam (2) can help isolate the area being worked on, but it does not directly address the issue of mercury vapor. Mercury amalgam (4) is a dental filling material that contains mercury, so it would not be a suitable method for reducing mercury vapor exposure.

Submit
10. Periodontal ligament fibers in the middle third of the root is:?

Explanation

The correct answer is oblique because periodontal ligament fibers in the middle third of the root are arranged in an oblique direction. This arrangement allows for flexibility and resistance to forces applied to the tooth, helping to absorb and distribute the forces evenly during chewing and biting. The oblique orientation of the fibers also helps to provide stability to the tooth within the socket.

Submit
11. In the definition of epidemiology, 'distribution' refers to:

Explanation

The term 'distribution' in the definition of epidemiology refers to the identification and analysis of the patterns and characteristics of a health-related event or disease in a specific population. This includes understanding who is affected (who), when the event or disease occurs (when), and where it is happening (where). By examining these factors, epidemiologists can gain insights into the causes and risk factors associated with the event or disease, and develop strategies for prevention and control.

Submit
12. Muscles of facial expression are innervated by

Explanation

The muscles of facial expression are innervated by the facial nerve (CN VII). This nerve is responsible for controlling the movement of the muscles that enable facial expressions such as smiling, frowning, and raising eyebrows. The facial nerve also innervates the muscles involved in closing the eyes, wrinkling the forehead, and moving the lips. This is why damage or dysfunction of the facial nerve can result in facial paralysis or weakness on one side of the face.

Submit
13. Periodontally involved root surface must be root planed to:?

Explanation

Periodontally involved root surfaces often accumulate plaque and calculus, which can contribute to further inflammation and disease progression. Therefore, root planing is necessary to remove these deposits and promote healing. Additionally, the necrotic cementum, which is a result of the inflammatory process, needs to be removed to allow for proper healing and regeneration of the periodontal tissues. By removing both the attached plaque and calculus and the necrotic cementum, the root surface can be prepared for optimal healing and restoration of biocompatibility.

Submit
14. មនុស្សស្រីម្នាក់អាយុ២៩ឆ្នាំមានវត្តមាននៅក្នុងផ្នែកសង្គ្រោះបន្ទាន់ ED Emergency Departmentដោយមានរបួស ផ្នែកក្រោ យនៃក្បាល។ អ្នកជំងឺត្អូញត្អែថាឈឺក្បាលខ្លាំង ហើយគេបានបញ្ជូនគាត់ទៅ ផ្នែកថត MRI បង្ហាញថាមានហូរឈាម (Bleeding ) នៅក្នុងលលាដ៏ក្បាល ហើយ CT scan បង្ហាញ ថាមានបែកលលាដ៏ក្បាល។ សួរថាតើ Cranial nuclei នៃ Thalamus ដែលពាក់ព័ន្ធទៅនឹង Mediating facial sensation និងការឈឺចាប់ណាខ្លះ?

Explanation

The cranial nuclei of the thalamus that are involved in mediating facial sensation and some aspects of facial movement are the ventral lateral nuclei.

Submit
15. ចូរជ្រើសរើសប្រភេទនៃជំងឺឆ្លងមួយ ដែលវានេះធ្វើអោយទន្ដពេទ្យម្នាក់ ប្រឈមនឹង គ្រោះថ្នាក់ (match the infectious disease for which a dentist, is at risk)

Explanation

Dentists are at risk of contracting Hepatitis B because the disease can be transmitted through contact with infected blood or body fluids, which can occur during dental procedures. Dentists often come into contact with patients' blood or saliva, making them susceptible to the virus if proper precautions are not taken. Hepatitis B is a viral infection that can cause liver inflammation and can lead to chronic liver disease or liver cancer if left untreated. Therefore, it is important for dentists to be vaccinated against Hepatitis B and follow strict infection control measures to prevent transmission.

Submit
16. Spontaneous pulpal pain is indicative of:?

Explanation

Spontaneous pulpal pain is a type of toothache that occurs without any external stimulus, such as hot or cold temperature. This type of pain is typically a sign of irreversible pulpitis, which is inflammation of the dental pulp that cannot be reversed. In irreversible pulpitis, the dental pulp becomes damaged or infected, leading to constant or intermittent pain. Reversible pulpitis, neurotic pulp, and hyperplastic pulp are not associated with spontaneous pulpal pain.

Submit
17. អ្នកជំងឺម្នាក់អាយុ ១៧ឆ្នាំ រអ៊ូរទាំអំពីគ្រុនក្តៅ អស់កំលាំង និងរលាកបំពង់ក។ ការពិនិត្យតាមគ្លីនិកបង្ហាញថាអ្នកជំងឺមានជំងឺឡើងកូនកណ្តុរទាំងសងខាង។ អ្នកកត់សំគាល់ឃើញថាមានឡើងពងក្រហមដ៏ច្រើនលើក្រអូមមាត់ទន់ និង មានការរីកប៉ោងត្រង់អណ្តាត និង Orapharyngeal ។ តើរោគវិនិច្ឆ័យនៃរោគសញ្ញាទាំងនេះទំនងជាអ្វី?

Explanation

The given symptoms of a 17-year-old patient, including sore throat, swollen tonsils, and enlarged lymph nodes, are indicative of infectious mononucleosis. This viral infection is commonly caused by the Epstein-Barr virus (EBV) and commonly affects teenagers and young adults. The presence of multiple symptoms such as fatigue, fever, and swollen spleen further support the diagnosis of infectious mononucleosis. The other options, including herpangine, acute lymphonodula pharyngitis, primary herpetic gingivostomatitis, and non-Hodgkin's lymphoma, do not align with the given symptoms and patient demographic.

Submit
18. គុណវិបត្តិចំបងរបស់ Cervical Headgear ដែលប្រើក្នុងការព្យាបាលពត់តម្រង់មួយចំនួន គឺ៖?

Explanation

The correct answer is Extrusion ទៅលើធ្មេញថ្គាមមុខខាងលើ. This means that the cervical headgear is used to push the upper molars backwards.

Submit
19. អ្នកជម្ងឺអាយុ ២៩ឆ្នាំ មានប្រវត្ត ហើមក ខាងស្តាំ និងឈឺមុនការហូបអារហារ បន្តិច។ តាមការពិនិត្យនៅគ្លីនីក តើវិធីសាស្រ្តមួយណាក្នុងការរក diagnostic ដែលចង្អុរបង្ហាញប្រាប់ ៖

Explanation

Occlusal radiograph is the correct answer because it is a diagnostic technique that can be used to identify dental issues such as cavities, fractures, and impacted teeth. This type of radiograph provides a detailed view of the upper and lower jaw, allowing dentists to assess the alignment of the teeth and the overall condition of the oral structures. It is particularly useful for evaluating problems in the posterior region of the mouth, which is consistent with the patient's symptoms of pain and swelling in the lower jaw.

Submit
20. ស្នាមចុចៗជាច្រើន (Multiple punched-out) Raliolucencies នៃឆ្អឹងក្បាល និងថ្គាម គេឃើញមានភាគច្រើននលើៈ

Explanation

Multiple myeloma is a type of cancer that affects plasma cells in the bone marrow. It is characterized by the presence of multiple punched-out lesions in the skull and skeleton. These lesions appear as areas of bone destruction on imaging studies. Other conditions like metastatic carcinoma, plasmacytoma, chondrosarcoma, and osteosarcoma can also cause bone lesions, but multiple myeloma is the most common cause of multiple punched-out lytic lesions in the skull and skeleton. Therefore, the correct answer is multiple myeloma.

Submit
21. ការប៉ះធ្មេញលើសរាងធ្មេញធម្មជាតិ ផ្ដល់ឧកាសអោយៈ 1. បង្កើនឲ្យplaque ជាប់ស្អិតរឹតតែខ្លាំង 2. កោសសំអាតយកplaque ចេញមានកំរិត (មិនអស់) 3. បង្កើនឲ្យជាប់កំទេចកំទីចំណីអាហារ 4. បង្កើននិងងាយស្រួលរងឥទ្ធិពលឲ្យមានរោគពុកធ្មេញ

Explanation

The correct answer is (4) ត្រឹមត្រូវ. This is because increasing plaque buildup and making it difficult to remove (1) and (2) can lead to an increased risk of dental problems. Additionally, increasing plaque buildup can also make it easier for harmful bacteria to thrive and cause tooth decay and gum disease (4). Therefore, both (2) and (4) are correct explanations for the given statement.

Submit
22. What sizes of the sutures that commonly used in oral cavity?

Explanation

The correct answer is 3/0 & 4/0. Sutures are commonly used in the oral cavity for closing wounds or incisions. The sizes of sutures are denoted by numbers, with smaller numbers indicating larger sutures. In this case, 3/0 and 4/0 are the sizes commonly used in the oral cavity. These sizes are appropriate for suturing delicate tissues in the mouth, providing optimal healing and minimizing scarring.

Submit
23. តើ NOE Fracture ចូលរួមផ្សំដោយឆ្អឹងណាខ្លះ ?

Explanation

NOE Fracture refers to a fracture involving the bones of the nose, orbit, and ethmoid bone. The correct answer includes all the bones that are commonly involved in NOE fractures, including the frontal bone, nasal bone, maxillary bone, lacrimal bone, ethmoid bone, and sphenoid bone.

Submit
24. For a patient of osteomyelitis who is allergic to penicillin, all of the following drugs are recommended as 2nd and 3rd choices except :

Explanation

Erythromycin is not recommended as a 2nd or 3rd choice for a patient with osteomyelitis who is allergic to penicillin. The other three options (clindamycin, cephalosporin, and sulfa drugs) are recommended as alternative choices for treating osteomyelitis in patients with penicillin allergy.

Submit
25. Which material has best biocompatibility Intraorally:?

Explanation

Titanium is known for its excellent biocompatibility, especially when used intraorally. It is widely used in dental implants and other oral prostheses due to its ability to integrate well with the surrounding bone and soft tissues without causing any adverse reactions or rejection. Titanium is also corrosion-resistant, which further enhances its biocompatibility and longevity in the oral environment. Cobalt chromium and nickel chromium alloys are commonly used in dentistry but may cause allergic reactions in some individuals. Gold Palladium is also biocompatible but is less commonly used in intraoral applications compared to titanium.

Submit
26. នៅពេលប្រើ ultra high speed សំភារៈឆាប (កាត់) ធ្មេញ ក្នុងការធ្វើ cavity preparation កំដៅធ្វើអោយកើតឡើងផ្ទាល់ ទាក់ទងទៅនឹង៖ 1. រយៈពេលនៃការឆាប រឺ កាត់ 2.ទំហំ ល្បឿន និង ភាពមុតនៃ Bur 3.ការប្រើប្រាស់ spray ខ្យល់ និង ទឹក 4. Eisting pulp pathology

Explanation

The correct answer is (1), (2), and (3) are all correct. When using ultra high speed for cavity preparation, factors such as the duration of the procedure, the size, speed, and aggressiveness of the bur, and the use of spray cooling and water all contribute to achieving the desired outcome. Therefore, all three options are relevant and necessary for successful cavity preparation.

Submit
27. Fixation with pack in maxillary sinus is :

Explanation

The fixation with a pack in the maxillary sinus is done to protect the mucosal covering of the maxillary sinus. This is because the maxillary sinus is lined with a delicate mucosal membrane that can easily be damaged during surgery or trauma. By placing a pack in the sinus, it provides a barrier between the delicate mucosa and any instruments or foreign bodies, helping to prevent damage and promote healing.

Submit
28. តើfiber groups PDL (ជាលិកាជុំវិញធ្មេញ) ណាមួយដែលទាក់ទងនឹងcentral incisor លើកលែងតែមួយ ?

Explanation

The correct answer is Interradicular. This refers to the area between the roots of a tooth. In the context of fiber groups, the interradicular fibers are the ones that connect the periodontal ligament (PDL) to the central incisor tooth. These fibers help to support and stabilize the tooth within the jawbone.

Submit
29. ការកន្រ្ដាក់នៃសាច់ដុំ eternal (lateral) pterygoid បានទាញ disc នៃសន្លាក់ temporomandibular ៖

Explanation

The correct answer is "forward and laterally". The movement of the disc of the temporomandibular joint is described as being pulled forward and to the side by the action of the lateral pterygoid muscle. This movement allows for the opening of the jaw.

Submit
30. Radiolucent lesions នៃឆ្អឹងថ្គាមលើឬក្រោមអាចត្រូវគេមើលឃើញនៅក្នុងៈ 1. hyperparathyroidism 2. multiple myeloma 3. fibrous dysplasia 4. hyperthyroidism

Explanation

Radiolucent lesions can be seen in hyperparathyroidism, multiple myeloma, and fibrous dysplasia. Therefore, the correct answer is (1), (2), and (3).

Submit
31. Insulin ផលិតមកពីក្រពេញមួយណា?

Explanation

The correct answer is "None of the above" because the options provided (Mecrocrin, Acinar, Tubular, Mecrocrin and Acina) do not accurately represent the source of insulin. Insulin is produced by the beta cells of the pancreas, which are not represented in any of the given options. Therefore, the correct answer is none of the above.

Submit
32. The following are the moderate allergy symptoms, except….

Explanation

Apnea is the exception among the given moderate allergy symptoms. Apnea refers to the temporary cessation of breathing, which is not typically associated with allergies. On the other hand, skin rash, itchy watery eyes, congestion, and difficulty breathing are commonly experienced as moderate allergy symptoms.

Submit
33. The following are the causes of difficult mask ventilation or intubation with pathologic states except

Explanation

The correct answer is "Limited mobility of the neck." This answer is correct because limited mobility of the neck is not a cause of difficult mask ventilation or intubation with pathologic states. Difficult mask ventilation or intubation can be caused by factors such as arthritis and ankylosis, laryngeal abnormalities, and endocrinopathies. However, limited mobility of the neck does not directly contribute to difficulty in mask ventilation or intubation.

Submit
34. Preoperative vit K is indicated in patients with:

Explanation

Preoperative vitamin K is indicated in patients with liver disease. Liver disease can impair the production of clotting factors, leading to a deficiency of vitamin K-dependent clotting factors. Vitamin K supplementation helps to restore the levels of these clotting factors, reducing the risk of bleeding during surgery. Diabetes mellitus, chronic pneumonitis, and accuracy do not directly affect the production or function of clotting factors, so preoperative vitamin K is not indicated in these conditions.

Submit
35. ឃ្លាទី១ Eeccrine sweat ត្រួតពិនិត្យដោយ cholinergic neurons ឃ្លាទី២ Apocrine sweat glands ផលិតដោយ pheromones

Explanation

Both eccrine sweat and apocrine sweat glands are correct.

Submit
36. ខាងក្រោមណាមួយជា Transient cessation of breathing

Explanation

Apnea refers to the transient cessation of breathing. This means that during apnea, a person temporarily stops breathing. This can occur due to various reasons such as blockage in the airway, neurological disorders, or certain medications. Apnea can be dangerous as it can lead to a decrease in oxygen levels in the body, causing symptoms like dizziness, fatigue, and even loss of consciousness. Treatment for apnea may involve lifestyle changes, the use of breathing devices, or surgery in severe cases.

Submit
37. The Discussion section needs to follow from:

Explanation

The given answer suggests that all of the options mentioned (Discussion section needs to follow from: All are corrects, Your results, Relate back to your literature review, The existing knowledge about the subject) are correct in terms of what should be included in the Discussion section of a research paper. The Discussion section should provide a comprehensive analysis and interpretation of the results obtained, relate these findings to the existing knowledge and literature, and discuss the implications and significance of the research.

Submit
38. Writing your discussion should be:

Explanation

The given answer states that all options are correct. This implies that all statements in the question are true and valid. The principal finding is that there are multiple correct answers to the question. This suggests that the question may have been designed to test the knowledge and understanding of various concepts or principles. However, without the specific question mentioned, it is not possible to provide a detailed analysis of the strengths and limitations of the study or compare it to other studies.

Submit
39. What are three the type of morphology of denture teeth?

Explanation

The three types of morphology of denture teeth are anatomy teeth, semi-anatomy teeth, and non-anatomy teeth.

Submit
40. Permanent maxillary incisors ជាទូទៅ:

Explanation

Permanent maxillary incisors are arranged in a specific pattern. The answer states that they have a larger size in the first position compared to the second position. Additionally, they erupt in a descending order, with the first incisor erupting before the second incisor. This explanation suggests that the permanent maxillary incisors follow a specific pattern in terms of size and eruption order.

Submit
41. ការយកពុម្ពក្រាស់ធ្មេញស្និតផ្នែកក្រោម ការកំណត់រកសាច់ដុំដែលពាក់ព័ន្ធទៅនឹងទំរង់ផ្ទែរាបផ្នែកអណ្តាតនៃតំបន់ធ្មេញថ្គាមធំ គឺជាការរាវរកសាច់ដុំ៖?

Explanation

The mylohyoid muscle is responsible for elevating the hyoid bone and the floor of the mouth during swallowing. It forms the floor of the oral cavity and helps in the movement of the tongue and the swallowing process. This muscle is located in the lower part of the mandible and connects to the hyoid bone. Therefore, it is the muscle that is most closely associated with the lower part of the throat and the movement of the tongue during swallowing.

Submit
42. Division 1 of CN V is running from:

Explanation

Division 1 of CN V, also known as the ophthalmic division, originates from the superior orbital fissure. The superior orbital fissure is a small opening in the skull located in the posterior part of the orbit. This division of CN V supplies sensory innervation to the forehead, scalp, upper eyelid, and the front part of the scalp. It also provides sensory innervation to the cornea, conjunctiva, and lacrimal gland. Therefore, the correct answer is Superior orbital fissure.

Submit
43. What are the limiting structures in maxillary in complete denture?

Explanation

The correct answer includes the structures that limit the extension and movement of the maxillary complete denture. The labial frenum, labial vestibule, buccal frenum, buccal vestibule, hamular notch, and posterior palatal seal area all play a role in providing stability and retention for the denture. The labial frenum and vestibule limit the forward movement of the denture, while the buccal frenum and vestibule limit lateral movement. The hamular notch acts as a posterior limit, preventing the denture from moving too far back. The posterior palatal seal area helps in achieving a proper seal and preventing food particles from entering the space between the denture and palate.

Submit
44. ធ្មេញធ្គាមទឹកដោះដែលផ្សាជាប់នឹងឆ្អឹង (An ankylosed primary molar) អាចបណ្តាលមកពី៖ 1. ពន្យាពេលក្នុងការដុះនៃធ្មេញ 2. ប្រែប្រួលកំណោងអ័ក្សធ្មេញ 3. ពិបាកនឹងការដកធ្មេញ 4. ដុះលូតហួសនៃ ធ្មេញទល់គ្នា

Explanation

An ankylosed primary molar can be caused by both factors mentioned in options (1) and (3). Option (1) states that an ankylosed primary molar can occur during the eruption process. Option (3) suggests that extraction of the primary molar can lead to an ankylosed primary molar. Therefore, both options (1) and (3) are correct in explaining the occurrence of an ankylosed primary molar.

Submit
45. ស្ថានភាពនៃ periodontal ដែលរកឃើញក្នុងអាយុ ១៤ ទៅ១៩ឆ្នាំ បង្ហាញអោយឃើញនូវការបាត់បង់ឆ្អឹងបពា្ឈរ (vertical bone loss) ពាក់ពន្ធ័ទៅនឹងថ្គាមធំទី១ និងធ្មេញមុខ៤ គឺ ៖

Explanation

Juvenile gingivitis is the correct answer because it is the only option that specifically mentions vertical bone loss, which is a characteristic feature of periodontal disease in individuals aged 14 to 19. The other options do not mention this specific symptom.

Submit
46. ស្រី្តអាយុ ៣២ឆ្នាំ ម្នាក់បានត្អូញត្អែរថាមានជម្ងឺគ្រុន ស្រកទំងន់និងល្អិតល្អើយដៃជើង។ គាត់មានការចេញកន្ទួលនៅម្តុំថ្ពាល់ និងច្រមុះ ព្រមទាំងមានដំបៅulcere មានរាងមិនធម្មតាខ្លះនៅលើ buccal mucosa ។ ការវិនិច្ឆ័យនេះភាគច្រើនគឺ៖

Explanation

The given symptoms of weight loss, ulcers, and lesions on the buccal mucosa are consistent with the condition called pemphigus. Pemphigus is an autoimmune disorder that causes blistering and erosions of the skin and mucous membranes. It is characterized by the production of autoantibodies that attack the proteins that hold skin cells together. This leads to the formation of blisters and ulcers. Other conditions listed, such as lichen planus, lupus erythematosus, erythema multiforme, and bullous pemphigoid, may also cause similar symptoms, but pemphigus is the most likely diagnosis based on the given information.

Submit
47. (7 y/o boy) came to the clinic in the right maxillary central incisor with large pulp exposure:?

Explanation

The correct answer is Pulpotomy with Ca(OH)2.

A pulpotomy is a dental procedure that involves removing the infected or inflamed pulp tissue from the crown portion of the tooth. In this case, the 7-year-old boy has a large pulp exposure in his right maxillary central incisor, indicating that the pulp tissue is exposed and likely infected. Pulpotomy with Ca(OH)2 is the appropriate treatment choice as it involves removing the infected pulp tissue and placing a medicated material (Ca(OH)2) to promote healing and prevent further infection. Pulpectomy with Ca(OH)2, direct pulp capping, or leaving it untreated would not be suitable options in this scenario.

Submit
48. នៅពេលចាប់ធ្វើការសម្ភាសអ្នកជំងឺជាដំបូង វត្ថុដែលសំខាន់តិចបំផុតត្រូវធ្វើនោះគឺ (In opening an initial interview a patient, the least important thing to do is)

Explanation

The question asks for the least important thing to do in opening an initial interview with a patient. Asking the patient why he or she has come is the least important because it should be assumed that the patient is coming for medical reasons. The other options are more important in establishing a good rapport and gathering necessary information.

Submit
49. ក្នុងការប្រកបវិជ្ជាជីវៈទន្តសាស្ត្រជាលក្ខណៈឯកជន ទន្ដពេទ្យម្នាក់ៗត្រូវ៖

Explanation

The answer states that individuals with mental disorders should receive appropriate care, supervision, and treatment in a suitable facility that provides quality products, services, and medical equipment. It also emphasizes the importance of assessing and providing the necessary support and resources to patients based on their needs and the recommendations of healthcare professionals.

Submit
50. តើជំងឺណាមួយដែលបង្ហាញលក្ខណៈដោយការថយចុះសកម្មភាពខួរឆ្អឹង?

Explanation

Aplastic anemia is a condition characterized by the failure of the bone marrow to produce enough new blood cells. This leads to a decrease in red blood cells, white blood cells, and platelets. The decreased production of red blood cells can result in fatigue, weakness, and shortness of breath. Therefore, aplastic anemia can be identified by the decrease in overall blood cell activity, which is indicated by the term "downward trend in hematopoiesis".

Submit
51. Treatment of choice to localized infection with pus is :

Explanation

The treatment of choice for a localized infection with pus is to establish drainage. This is because drainage helps to remove the pus and infected material from the affected area, allowing for proper healing. Antibiotic administration may also be necessary to help fight the infection, but drainage is the primary method to address the localized infection. Applying cold to the area and advising hot mouth washes are not appropriate treatments for a localized infection with pus.

Submit
52. The component of dental plaque most responsible for its adhesiveness is:

Explanation

Dextran is a type of polysaccharide that is produced by certain bacteria in dental plaque. It forms a sticky matrix that helps the plaque adhere to the teeth and other surfaces in the mouth. Bacteria, viruses, and dead cells are also present in dental plaque, but dextran is specifically responsible for its adhesiveness.

Submit
53. What is the different between Azithromycin and Clarithromycin?

Explanation

Both Azithromycin and Clarithromycin are classified as Macrolides 2nd generation, meaning they belong to the same class of antibiotics. This classification is based on their chemical structure and mechanism of action. Therefore, this statement is correct and provides a similarity between the two drugs.

Submit
54. ណាមួយដែលកំណត់ផ្នែកខាងក្រោយនៃ oral cavity នឹងផ្នែកខាងមុខនៃ fauces?

Explanation

The palatoglossal arch is the structure that separates the oral cavity from the oropharynx. It is located at the back of the oral cavity and forms a boundary between the two regions. The other options, such as the tonsil, soft palate, dorsum of the tongue, and palatopharyngeal arch, are not specifically related to the division between the oral cavity and the oropharynx.

Submit
55. Which of the following is wrong about the management of angina pectoris:

Explanation

The management of angina pectoris involves avoiding vasoconstrictors in local anesthesia (LA) as they can worsen the condition by further reducing blood flow to the heart. Aspiration is also important to prevent the vasoconstrictors from entering the bloodstream and causing systemic effects. Therefore, large amounts of vasoconstrictors in LA with particular importance of aspiration is incorrect.

Submit
56. គ្មានរោគសញ្ញា (Asymptomatic) ទាំងសង្ខាង (bilateral) រាងដូចសំណាញ់(reticular) ការសាយភាយ (radiating), grayish-white linear lesions នៃ buccal mucosa ភាគច្រើនជាសញ្ញានៃៈ

Explanation

The given description of the lesions as asymptomatic, bilateral, reticular, radiating, and grayish-white linear lesions in the buccal mucosa is consistent with lichen planus. Lichen planus is a chronic inflammatory condition that affects the skin and mucous membranes, including the buccal mucosa. It typically presents with reticular or lace-like white lesions, which may be linear or radiating in pattern. The lesions are usually asymptomatic and can be bilateral. Therefore, lichen planus is the most appropriate answer based on the given description.

Submit
57. Stomatitis ដោយសារ denture អាចរួមផ្សំជាមួយ៖?

Explanation

All of the above answers are correct. Stomatitis can be caused by a variety of factors, including candida albicans infection, xerostomia (dry mouth), poor fitting dentures, and inadequate denture hygiene.

Submit
58. What is hamular notch?

Explanation

The hamular notch is a depression located between the maxillary tuberosity and the hamulus of the medial pterygoid plate.

Submit
59. ហើមហើយឈឺចាប់ខ្ទោកៗ (Intermittent painful swelling) នៅតំបន់ submandiblar ដែលបង្កើនការឈឺចាប់នៅពេលបាយនោះគឺៈ

Explanation

The given correct answer, a blockage of Wharton's duct, is the most likely explanation for the intermittent painful swelling in the submandibular region. Wharton's duct is the main duct that carries saliva from the submandibular gland to the mouth. If this duct becomes blocked, it can cause a buildup of saliva and lead to painful swelling. The other options, such as ranula, Ludwig's angina, a blockage of Stensen's duct, and epidemic parotitis, do not specifically involve the submandibular gland or its ducts.

Submit
60. ដំណាក់កាលដំបូងនៃការកកើតរោគពុកធ្មេញ pH ដែលមាននៅក្នុងសំអេកធ្មេញបាក់តេរី របស់ធ្មេញត្រូវមានកំរិត៖?

Explanation

The correct answer is "ត្រឹម 6,8". This is because the initial pH of stomach acid is around 1.5 to 3.5, which is highly acidic. As food is digested and passes through the stomach, it is neutralized by bicarbonate ions from the pancreas, raising the pH to around 6.8 in the small intestine. Therefore, the pH of stomach acid at the beginning should be closer to 6.8.

Submit
61. How to clean and take away the follicle in the cervical of the tooth?

Explanation

The correct answer is "Cut by scissor." This suggests that the method to clean and remove the follicle in the cervical area of the tooth is by cutting it with scissors. This implies that a physical removal is required, rather than peeling off or wiping with gauze. Additionally, the use of Sodium Hypochloride is not mentioned as a cleaning method in this context.

Submit
62. ធ្មេញមុខដែលមានការប្រែប្រួល ទំហំ និងរូបរាង ខ្លាំងបំផុតនោះគឺ៖(The anterior tooth with the greatest variability in size and shape is the)

Explanation

The maillary lateral incisor is the anterior tooth with the greatest variability in size and shape. This means that among the options given, the maillary lateral incisor is the tooth that can vary the most in terms of its size and shape compared to the other teeth mentioned (mandibular canine, maillary canine, maillary central incisor, and mandibular central incisor).

Submit
63. Best selection of preventing abutments tooth of class I Kennedy from the negative effects of the additional load applied to them is by:

Explanation

Keeping a light occlusion on the distal extensions is the best selection for preventing abutment teeth of class I Kennedy from the negative effects of additional load. This means that the pressure and force applied to the teeth in the back of the mouth should be minimized. This can be achieved by ensuring that the occlusion, or the way the upper and lower teeth come together, is not too heavy on the distal extensions. By reducing the force on these teeth, the risk of damage or complications due to the additional load is decreased.

Submit
64. សកម្មភាពអូសបន្លាយរបស់សារជាតិ Barbiturate ត្រូវបានបញ្ចេញមកតាមរយៈ សរីរាង្គណា១?

Explanation

The correct answer is "គ្រលៀន". Barbiturates are a class of drugs that act as central nervous system depressants. They are commonly used as sedatives, hypnotics, and anticonvulsants. The word "គ្រលៀន" in Khmer translates to "sedative" in English, which accurately describes the action of barbiturates.

Submit
65. Excessive formation of scar tissue beyond the wound margin is called?

Explanation

A keloid is the excessive formation of scar tissue beyond the wound margin. It is characterized by a raised, thickened, and often shiny appearance. Keloids can occur after any type of skin injury, such as surgery, burns, or even minor cuts. They are more common in individuals with darker skin tones and may cause itching, pain, or discomfort. Treatment options for keloids include corticosteroid injections, silicone gel or sheeting, cryotherapy, laser therapy, or surgical removal.

Submit
66. What happen to the tissue pH at the infection side?

Explanation

During an infection, the body's immune response triggers the release of various chemicals, including hydrogen ions. These hydrogen ions contribute to the acidity of the area, resulting in a decrease in pH. This low pH environment is unfavorable for many pathogens, as it can inhibit their growth and survival. Therefore, the tissue pH at the infection site becomes low.

Submit
67. A labial frenum បណ្ដាលឲ្យមាន diastema នៅចន្លោះរវាង maillary permanent central incisors ទាំងពីរ។ lateral incisors និង canines មិនទាន់បានដុះនៅឡើយទេ។ ការព្យាបាលដែល សមរម្យបំផុតនោះ គឺ៖

Explanation

The correct answer is to observe the case until the eruption of maillary permanent lateral incisors and canines. This is because the labial frenum is causing a diastema (gap) between the maxillary permanent central incisors, but the lateral incisors and canines have not yet erupted. It is important to wait until these teeth have erupted before deciding on the appropriate treatment, as they may help to close the gap naturally. Therefore, observing the case until the eruption of these teeth is the most appropriate course of action.

Submit
68. When designing palatal connectors, relief should be given for:

Explanation

When designing palatal connectors, relief should be given for the palatal torus. Palatal torus refers to a bony prominence on the palate, which can vary in size and shape among individuals. Providing relief for the palatal torus ensures that the connector does not impinge on this anatomical structure, allowing for a more comfortable and secure fit of the dental appliance. By accommodating the palatal torus, the palatal connector can distribute forces evenly and prevent any discomfort or pressure on the torus during functional movements of the mouth.

Submit
69. តើការបញ្ចេញហួសកំរិតនៃ អ័រម៉ូនណាមួយដែលមានទំនាក់ទំនងធ្វើអោយមានការកើនឡើងនូវប្រសិទ្ធភាពរបស់ជាតិ epinephrine?

Explanation

Thyroxin is a hormone produced by the thyroid gland that plays a crucial role in regulating the body's metabolism. It increases the metabolic rate, which leads to an increase in energy production and utilization. This increase in energy can result in heightened alertness, increased heart rate, and improved overall physical performance. Therefore, the release of thyroxin can lead to an increase in the body's efficiency and effectiveness, hence enhancing its overall performance and functionality.

Submit
70. The term applied to a low white blood cell count is

Explanation

Leukopenia is the correct answer because it refers to a low white blood cell count. Leukocytosis, on the other hand, refers to a high white blood cell count. Thrombocythemia and thrombocytopenia are related to platelet counts, not white blood cell counts. Anemia, meanwhile, is a condition characterized by a low red blood cell count or low hemoglobin levels, not white blood cells.

Submit
71. The term 'carcinoma in situ' implies that the lesion shows?

Explanation

The term 'carcinoma in situ' refers to a condition where the abnormal cells are confined within the epithelium, meaning they have not invaded deeper tissues or spread to other parts of the body. Dysplasia is a term used to describe abnormal cellular changes, such as changes in size, shape, and organization, which are often seen in pre-cancerous or early cancerous lesions. Therefore, the correct answer is dysplasia of cells confined within the epithelium.

Submit
72. Giving the name of this flap

Explanation

not-available-via-ai

Submit
73. អ្នកជំងឺអាយុ 10ឆ្នាំ ម្នាក់បានត្អូញត្អែអំពីការលំបាកនៅលើធ្មេញថ្គាមទឹកទី2លើ ពេលទំពារចំណីអាហារ។ ធ្មេញរង្គើរ ហើយមានប៉ះអាម៉ាលហ្គាមយ៉ាងធំនៅ mesio-occlusal ។ អ្នកសង្ស័យថា ៖

Explanation

The patient is a 10-year-old who experienced pain on biting down on hard food. The tooth in question has a large mesio-occlusal cavity and shows signs of pulp inflammation. The correct answer, traumatic occlusion, refers to the condition where the tooth is subjected to excessive forces during occlusion, leading to pulp inflammation and pain. This is consistent with the patient's symptoms and the observed clinical findings.

Submit
74. Which of the following would most clearly differentiate an acute periodontal abscess from an acute periapical abscess?

Explanation

The most clear differentiation between an acute periodontal abscess and an acute periapical abscess would be the response to a test for vitality. In an acute periodontal abscess, the tooth is vital and will respond to the test for vitality, whereas in an acute periapical abscess, the tooth is non-vital and will not respond to the test. This test helps to determine the source and location of the abscess.

Submit
75. ការប្រើប្រាស់ pins ក្នុងការប៉ះ Amalgam បង្កើននូវភាពអន្តរាយដល់៖ 1. ប្រេះ ក្បាលធ្មេញ 2. ធ្វើអោយធ្លាយដល់បណ្តូលធ្មេញ 3. ធ្វើអោយឆាប់ងាយទទួលកំដៅ 4. ធ្វើអោយដាច់ដោច Periodontal ligament"?

Explanation

The correct answer is (4) ត្រឹមត្រូវ. The use of pins in the placement of amalgam increases the retention of the material, which helps prevent dislodgement and improves the overall durability of the restoration. This is especially important in areas such as the occlusal surface of the tooth (1) where there is a lot of chewing force, (2) areas where there is a need to provide additional support to the weakened tooth structure, and (3) areas where it is important to achieve proper alignment and stability. Therefore, the use of pins in these situations is appropriate and necessary.

Submit
76. Which of the following is necessary to make a diagnosis of an odontogenic keratocyst?

Explanation

To make a diagnosis of an odontogenic keratocyst, a histologic examination is necessary. This involves analyzing a tissue sample under a microscope to identify the characteristic features of the cyst. Aspiration, exfoliative cytology, and radiographic examination may provide additional information, but they are not sufficient on their own to confirm the diagnosis of an odontogenic keratocyst.

Submit
77. Which of the following is NEVER associated with an impacted tooth?

Explanation

A primordial cyst is a developmental cyst that forms in the place where a tooth should have developed but did not. It is not directly associated with an impacted tooth because it occurs before the tooth even begins to form. In contrast, adeno-ameloblastoma, odontogenic myxoma, Pindborg's tumor, and ameloblastoma are all types of tumors that can be associated with an impacted tooth.

Submit
78. Whis is the name of this incision?

Explanation

Z-plasty is a surgical technique used to reposition or lengthen scars. It involves creating two triangular flaps of skin with a central limb, resembling the letter "Z". This technique is commonly used to improve the functional and cosmetic outcomes of scars, particularly in areas of tension. The triangular flaps are designed to redirect tension away from the scar, resulting in a more inconspicuous and flexible scar. Therefore, the correct answer is Z-plasty.

Submit
79. ការបាត់បង់ធ្មេញចង្កូមទឹកដោះយ៉ាងលឿនមុនពេលកំណត់ នៅក្នុងករណីយ៏ Class I និង Class II បណ្ដាលឲ្យមានការកើនឡើង 1. overjet. 2. arch width. 3. overbite. 4. leeway space.

Explanation

The correct answer is (1) and (3) are correct. This is because overjet refers to the horizontal distance between the upper and lower incisors, and overbite refers to the vertical overlap of the upper and lower incisors. Both of these factors can contribute to the severity of crowding in Class I and Class II cases.

Submit
80. A 25 years-old male complained of many minute vesicles on the vermillion border of the upper lip. The vesicles were preceded by an "itching" sensation. The patient stated the vesicles develop "two or three times" a year. The MOST LIKELY diagnosis is?

Explanation

The patient's symptoms of vesicles on the vermillion border of the upper lip, preceded by itching and occurring multiple times a year, are consistent with recurrent herpes simplex infection. Herpes zoster typically presents as a painful rash in a dermatomal distribution, while primary herpetic stomatitis usually occurs in children and presents with widespread oral ulcers. Recurrent aphthous ulceration typically presents as shallow, painful ulcers in the oral cavity. Therefore, recurrent herpes simplex infection is the most likely diagnosis based on the patient's symptoms.

Submit
81. ការធ្វើ Cavity varnish ក្នុងការប៉ះ Amalgam និងបណ្តាលអោយ៖ 1. មានប្រសិទភាពសំលាប់បាក់តេរី 2. បន្ថយការលេច ឬជ្រាបចូលតាមគែម 3. បង្កើតរំញោចដល់ការកកើត Secondary dentine 4. ថយចុះពណ៌ធម្មជាតិរបស់ធ្មេញ?

Explanation

Cavity varnish is used in the placement of amalgam to provide several benefits. It helps to seal the dentinal tubules, preventing sensitivity and leakage of fluids. It also aids in the adaptation of the amalgam to the cavity walls, ensuring a better marginal seal. Additionally, cavity varnish promotes the formation of secondary dentin, which helps protect the pulp. Lastly, it acts as a barrier, preventing the discoloration of the tooth structure caused by the components of the amalgam. Therefore, options (2) and (4) are correct as they accurately describe the benefits of using cavity varnish in amalgam placement.

Submit
82. Papillary hyperplasia on the palate of a patient wearing a maxillary complete denture is most likely to be associated with

Explanation

Papillary hyperplasia on the palate is a condition characterized by the overgrowth of the tissue on the palate. This condition is commonly associated with wearing an ill-fitting denture and poor oral hygiene. An ill-fitting denture can cause trauma and irritation to the tissues, leading to hyperplasia. Poor oral hygiene can also contribute to the development of this condition as it allows for the accumulation of plaque and bacteria, further irritating the tissues. Heavy smoking and an allergy to acrylic resin are not typically associated with papillary hyperplasia. Occlusion with posterior natural teeth is also not a common cause of this condition.

Submit
83. Which one of the following would be of greatest value in determining the etiology of an oral ulceration?

Explanation

The history of the oral lesion would be of greatest value in determining the etiology of an oral ulceration. By gathering information about the patient's medical history, including any recent trauma, infections, or medication use, it can help identify potential causes of the ulceration. Additionally, the history can provide insights into the duration, progression, and associated symptoms of the lesion, which can aid in making a diagnosis.

Submit
84. What is this surgical procedure

Explanation

A fraenectomy is a surgical procedure that involves the removal or modification of the fraenum, a small fold of tissue that connects the lips, tongue, or cheeks to the underlying structures. It is commonly performed to correct issues such as a short or tight fraenum that restricts movement or causes dental problems. In this case, the correct answer is Fraenectomy, as it refers to the general surgical procedure of removing or modifying the fraenum.

Submit
85. នៅលើ mandibular dental arch របស់ក្មេងប្រុសអាយុ ១២ឆ្នាំម្នាក់, ធ្មេញ permanent first molars បានប៉ះគ្នាជាមួយ first premolars និងក្បាលធ្មេញនៃ second premolars ដែលបានដុះងាកមកខាង lingual។ មូលហេតុនោះបណ្ដាលមកពី ៖

Explanation

The premature loss of deciduous second molars can lead to the permanent first molars being displaced and erupting in a more forward position. This can cause a lack of space for the first premolars and the lingual eruption of the second premolars, resulting in them being displaced and erupting in an abnormal position. Therefore, the premature loss of deciduous second molars is the most likely explanation for the observed dental arch pattern.

Submit
86. A patient presents with painless, bluish lump (10 mm in diameter) just inside the vermillion border of the lower lip. The MOST LIKELY diagnosis is?

Explanation

The most likely diagnosis for a painless, bluish lump just inside the vermillion border of the lower lip is a mucocoele. Mucocoeles are commonly caused by trauma to the minor salivary glands, leading to the accumulation of saliva in a cyst-like structure. They often present as bluish or transparent swellings and are typically painless. Smokers' keratosis, squamous cell carcinoma, fibroma, and fibro-epithelial polyp are less likely diagnoses in this case.

Submit
87. Dysplastic lesions របស់ Squanmous epithelium កើតមានញឹកញាប់បំផុតនៅលើ៖?

Explanation

Dysplastic lesions of squamous epithelium are most commonly found on the buccal mucosa.

Submit
88. A patient on broad spectrum antibiotics for four weeks presents with widespread, sore, red and white oral mucosal lesions The most likely diagnosis is

Explanation

Given the patient's symptoms of widespread, sore, red, and white oral mucosal lesions, the most likely diagnosis is candidiasis. Candidiasis is a fungal infection caused by the overgrowth of Candida species, commonly Candida albicans, in the oral cavity. It often occurs in patients who have been on broad-spectrum antibiotics for an extended period, as antibiotics can disrupt the normal balance of microorganisms in the mouth, allowing Candida to flourish. The characteristic appearance of red and white lesions is known as pseudomembranous candidiasis or thrush.

Submit
89. A 20-year old male presents with a three-day history of an acute generalized gingivitis He has malaise, fever and bilateral cervical lymphadenopathy A blood examination reveals Hb: 89g100mlPlatelets: 82,000mm3Red blood cell count: 3,900,000mm3White blood cell count: 870,000mm3Normal Values:Hb: 14-18g100mlPlatelets: 150,000-400,000mm3 Red blood cell count: 4-5millionmm3White blood cell count: 5,000-10,000mm3The most likely diagnosis is?

Explanation

The patient's symptoms of malaise, fever, and cervical lymphadenopathy, along with abnormal blood examination findings of low hemoglobin, low platelets, low red blood cell count, and low white blood cell count, are consistent with acute myelogenous leukemia. This is a type of cancer that affects the bone marrow and causes abnormal production of myeloid cells, leading to a decrease in normal blood cell counts. Acute necrotizing ulcerative gingivitis typically presents with severe gingival pain, foul odor, and ulceration, but does not typically cause systemic symptoms or abnormal blood counts. Thrombocytopenic purpura and infectious mononucleosis may cause low platelets and abnormal blood counts, but do not typically cause the other symptoms described in the patient.

Submit
90. How many level of Precaution of using antibiotic:

Explanation

The correct answer is 3 levels: Level A, B, C. This means that there are three levels of precaution when using antibiotics, namely Level A, Level B, and Level C. It suggests that there are different levels of caution and guidelines that need to be followed while using antibiotics to ensure their proper and effective use.

Submit
91. ការបៀមមេដៃ(Thumbsucking)នៅក្នុងករណីភាគច្រើនមិនបណ្ដាលឲ្យមានគ្រោះថ្នាក់ជា ប្រចាំ ទៅដល់ដំណុះធ្មេញ ប្រសិនបើទម្លាប់នេះ ៖

Explanation

Thumbsucking is a common behavior in young children, but it is usually discontinued before the age of four. This means that most children naturally stop thumbsucking on their own before they reach four years old. Therefore, the correct answer is that thumbsucking is discontinued before four years of age.

Submit
92. The EARLIEST apical radiographic change seen in a pulpally involved tooth is?

Explanation

The earliest apical radiographic change seen in a pulpally involved tooth is widening of the periodontal ligament space. This can indicate inflammation and increased blood flow in the area, which is a response to the infection or injury in the pulp. Resorption of bone, loss of lamina dura, and external root resorption may occur later as the infection progresses and the inflammatory process continues. However, the initial change that can be observed on a radiograph is the widening of the periodontal ligament space.

Submit
93. តើដុំពក (tumors) ណាមួយដែលកើតនៅក្រពេញ Parotid salivary gland? 1. Mixed tumor 2. Adenocarcinoma 3. Warthin’s tumor 4. Mucoepidermoid tumor"?

Explanation

The correct answer is (1), (2), and (4). This is because all three types of tumors mentioned - mixed tumor, adenocarcinoma, and mucoepidermoid tumor - can occur in the Parotid salivary gland. Warthin's tumor, on the other hand, typically occurs in the submandibular salivary gland rather than the Parotid gland.

Submit
94. Which of the following conditions is an example of a mucous retention phenomenon?

Explanation

A ranula is a type of mucous retention phenomenon. It occurs when the ducts of the sublingual or submandibular salivary glands become blocked, causing the mucus to accumulate and form a cyst-like swelling. This condition is characterized by a painless, translucent, bluish swelling in the floor of the mouth. It is typically caused by trauma, infection, or obstruction of the salivary ducts. Treatment usually involves surgical removal of the cyst.

Submit
95. Hyperplastic lingual tonsils may resemble which of the following?

Explanation

Hyperplastic lingual tonsils may resemble median rhomboid glossitis.

Submit
96. Clindamycin is in the group of:

Explanation

Clindamycin belongs to the group of macrolide antibiotics. Macrolides are a class of antibiotics that inhibit bacterial protein synthesis by binding to the 50S ribosomal subunit. They are effective against a wide range of gram-positive bacteria, some gram-negative bacteria, and atypical pathogens. Clindamycin specifically is commonly used to treat infections caused by anaerobic bacteria and certain types of gram-positive bacteria. It is not a penicillin or a fluoroquinolone, and septicemia is a condition characterized by the presence of bacteria in the bloodstream, not a group of antibiotics.

Submit
97. មូលហេតុភាគច្រើនបំផុតដែលបណ្ដាលឲ្យមាន a Class I malocclusion គឺ ៖

Explanation

The most likely explanation for the correct answer, "inequity between tooth size and supporting bone," is that this condition refers to a Class I malocclusion. In a Class I malocclusion, there is a discrepancy between the size of the teeth and the size of the supporting bone. This can lead to misalignment of the teeth and an improper bite. It is important to note that the other options listed, such as discoordinate growth of the dental arch, insufficient tooth size, maillary incisor crowding, and congenitally missing teeth, may also contribute to malocclusion but are not the primary cause in a Class I malocclusion.

Submit
98. The drug most commonly used to treat trigeminal neuralgia is ?

Explanation

Carbamazepine (Tegretol) is the drug most commonly used to treat trigeminal neuralgia. Trigeminal neuralgia is a condition characterized by severe facial pain, often triggered by normal activities such as eating or speaking. Carbamazepine is an anticonvulsant medication that helps to reduce the abnormal electrical activity in the nerves responsible for the pain. It is considered the first-line treatment for trigeminal neuralgia due to its effectiveness in relieving pain and its relatively low side effect profile compared to other medications. Diazepam, ergotamine, and phenytoin are not typically used for treating trigeminal neuralgia.

Submit
99. ប្រភពរបស់ Metastic carcinoma នៃឆ្អឹងថ្គាមក្រោម កើតមាន lesion ដំបូងចេញមកពី៖ 1. សួត 2. ដោះ 3. Prostate 4. Nasopharynx"?

Explanation

Metastatic carcinoma refers to cancer that has spread from its original site to other parts of the body. In this case, the source of the metastatic carcinoma is not specified, but it is indicated that the lesion originated from the nasopharynx or prostate. Therefore, the correct answer is (4) ត្រឹមត្រូវ, as both options (1) and (3) are mentioned as possible sources of the lesion. Option (2) is not mentioned as a possible source, and therefore is not correct.

Submit
100. Dentigerous cysts are usually found

Explanation

Dentigerous cysts are usually found pericoronally, meaning they are located around the crown of an impacted tooth. This type of cyst forms when the crown of a tooth becomes trapped within the surrounding tissue, causing fluid to accumulate and form a cystic sac. Pericoronal cysts are commonly associated with impacted third molars, also known as wisdom teeth, which often do not fully erupt and remain partially or completely covered by gum tissue. Therefore, the correct answer is pericoronally.

Submit
101. A possible consequence for patients taking cyclosporine is?

Explanation

Cyclosporine is known to cause fibrous gingival hyperplasia in some patients. This condition is characterized by an overgrowth of fibrous tissue in the gums, resulting in enlarged and swollen gums. It can lead to aesthetic concerns and difficulties in maintaining oral hygiene. Regular dental care and monitoring are necessary for patients taking cyclosporine to manage this side effect.

Submit
102. What is the mycotic aneurysm?

Explanation

A mycotic aneurysm is a complication that occurs when a bacterial infection spreads through the bloodstream and affects the arterial wall. This can weaken the wall and cause it to bulge, forming an aneurysm. It is called "mycotic" because it is often caused by a fungal infection, although bacterial infections can also be responsible. This condition is a serious medical concern as it can lead to rupture of the aneurysm and potentially life-threatening complications.

Submit
103. តើណាមួយនៃខាងក្រោម ដែលសំខាន់នៅពេលប្រើ (ប៉ះ) spherical ជាជាង admi alloy ចំពោះការប្រើអាម៉ាលហ្គាមសំរាប់បិទប៉ះប្រចាំថ្ងៃ? 1. a larger diameter condenser. 2. an anatomical wedge. 3. decreased condensing pressure. 4. a dead soft matri band.

Explanation

The correct answer is (1) and (3). This is because a larger diameter condenser and decreased condensing pressure are both important factors for efficient and effective cooling in the daily use of spherical admi alloy for soldering. An anatomical wedge and a dead soft matri band are not relevant to the process of soldering and cooling.

Submit
104. An injection at the anterior border of the ramus of the mandible, a centimetre above the lower occlusal plane, will anaesthetise the ?

Explanation

An injection at the anterior border of the ramus of the mandible, a centimetre above the lower occlusal plane, will anaesthetise the long buccal nerve.

Submit
105. មូលហេតុចំបងដែលធ្វើអោយ pulp chamber និង root canals រួមត្បៀតតូច បណ្តាលមកពី៖ 1. អាយុកាន់តែចាស់ 2. ការបុកប៉ះទង្គិចធ្មេញរ៉ាំរ៉ៃ (Chronic trauma) 3. Dentinal dysplasia 4. Taurodontism"?

Explanation

The correct answer is (1), (2), and (3) are all correct. This is because the question is asking for the factors that can cause the pulp chamber and root canals to be smaller. Option (1) states that age can cause the pulp chamber and root canals to become smaller. Option (2) states that chronic trauma can also cause this. Option (3) states that dentinal dysplasia can cause the same effect. Therefore, all three options are correct explanations for the given statement.

Submit
106. Hairy leukoplakia is caused by which of the following viruses?

Explanation

Hairy leukoplakia is a condition characterized by white, hairy-like patches on the tongue, caused by the Epstein-Barr virus (EBV). EBV is a common virus that infects most people at some point in their lives and is associated with various diseases, including infectious mononucleosis. While other viruses listed, such as Papilloma, Herpes simplex, and Human immunodeficiency virus (HIV), can cause oral lesions, they are not specifically associated with hairy leukoplakia.

Submit
107. A well circumscribed 3mm radiolucent lesion is present in the apical region of the mandibular second premolar The tooth responds normally to vitality tests The radiolucency is most likely?

Explanation

The given information states that a 3mm radiolucent lesion is present in the apical region of the mandibular second premolar. However, the tooth responds normally to vitality tests. Based on this information, it is unlikely to be a periapical granuloma, periapical cyst, or chronic periapical abscess, as these conditions would typically cause pain or discomfort and would result in abnormal vitality test results. The most likely explanation is that the radiolucent lesion is located near the mental foramen, which is a normal anatomical structure in the mandible.

Submit
108. What is the Bactericidal antibiotic?

Explanation

Bactericidal antibiotics are a type of antibiotic that directly kill bacteria. Unlike bacteriostatic antibiotics, which only inhibit the growth and reproduction of bacteria, bactericidal antibiotics actively destroy the bacteria, leading to their death. This is achieved by targeting specific components or processes within the bacterial cells, such as cell wall synthesis or protein synthesis, causing irreparable damage and ultimately killing the bacteria. Bactericidal antibiotics are often preferred in severe or life-threatening infections, where rapid elimination of the bacteria is crucial for the patient's recovery.

Submit
109. តើការប្រែប្រួលនៃ oral mucosa ណា១ ដែលអាចជា side effects របស់ chemotherapy? 1. Atrophic thinning. 2. Ulceration. 3. Necrosis. 4. Spontaneous bleeding.

Explanation

The correct answer is (2) and (4). Ulceration and spontaneous bleeding are potential side effects of chemotherapy on the oral mucosa.

Submit
110. តើសញ្ញាគ្លីនីកណាមួយ ដែលបញ្ជាក់ថាមានការរលាកអញ្ចាញ? 1. បាត់បង់លក្ខណៈពណ៌ធម្មជាតិ 2. អញ្ចាញរីក 3. ហូរឈាមនៅពេលប៉ះជាមួយ periodontal probe 4. មានការកើនឡើងជំរៅ pocket ពេលវាស់ដោយ periodontal probe"

Explanation

The correct answer is (2) and (4) because the statement in option (2) states that the device detects oscillations, which implies that it can detect vibrations or movements. Option (4) states that the device can measure pocket depths using a periodontal probe, which is a tool used to measure the depth of the space between the gum and tooth. Both of these options indicate that the device can detect and measure certain characteristics or conditions.

Submit
111. Which oral condition predisposes to caries?

Explanation

Xerostomia, or dry mouth, is a condition that reduces saliva production. Saliva plays a crucial role in maintaining oral health by washing away food particles and neutralizing acids produced by bacteria, which helps prevent tooth decay. When there is a lack of saliva, the mouth becomes dry, making it easier for bacteria to thrive and causing an increased risk of developing caries, or cavities. Therefore, xerostomia predisposes individuals to caries.

Submit
112. Physiologic (racial) pigmentation differs from melanoma because melanoma?

Explanation

Physiologic (racial) pigmentation refers to the natural pigmentation of the skin that varies among different races. Melanoma, on the other hand, is a type of skin cancer that arises from the melanocytes, the cells responsible for producing melanin. Melanoma differs from physiologic pigmentation because it contains melanin. While both may involve pigmentation, melanoma is a pathological condition characterized by the presence of abnormal melanocytes and can be potentially life-threatening.

Submit
113. ដើម្បីមានភាពរឹងមាំល្អ និង មានសោភណ័ភាព porcelain ដែលមានគ្រោងជា metal ត្រូវមាន margin ដែល 1. កំរាស់ 0,8-1,2 រាង shoulder 2. មានខ្សែបន្ទាត់មុំ aio gingival រាងច្បាស់ហើយស្មើរ 3. មានតែម Cavo surface 90-100 4. មាន limit cervical ក្រោមអញ្ជាញ 2mm

Explanation

To achieve good aesthetics and a porcelain-like appearance in a metal crown, it is necessary to have specific margins and characteristics. The shoulder margin should be 0.8-1.2 mm in width and have a shoulder shape. The crown should have an all-in-one (AIO) gingival bevel that is smooth and continuous. The Cavo surface should have a 90-100 degree angle. Additionally, there should be a cervical limit below the gingival margin of 2mm. Therefore, options (1), (2), and (3) are all correct and aligned with the given requirements.

Submit
114. តើនៅក្នុងណាមួយនៃស្ថានភាពដូចខាងក្រោម ដែលការបន្ថែមជាតិ fluoride ត្រូវតម្រូវឲ្យធ្វើ? 1. A 4 year old child with active caries. 2. A child with active caries living where drinking water contains ?0.7 ppm. 3. A 75 year old patient with active caries who takes erostomic medications. 4. A 1 year old toddler living in a non-fluoridated community.

Explanation

The correct answer is (2) and (4) are both correct. Adding fluoride is necessary for a child with active caries living in an area where the drinking water contains less than 0.7 ppm of fluoride (option 2). It is also necessary for a 1-year-old toddler living in a non-fluoridated community (option 4). Both cases require the addition of fluoride to prevent tooth decay and promote dental health.

Submit
115. The following chemically bond to the tooth:?

Explanation

Glass ionomer cement chemically bonds to the tooth. This type of cement contains a combination of glass powder and an organic acid. When it is applied to the tooth, the acid reacts with the minerals in the tooth structure, creating a strong chemical bond. This bond helps to seal the tooth and prevent bacteria from entering, reducing the risk of further decay. Composite resin, dental sealants, and amalgam do not chemically bond to the tooth in the same way as glass ionomer cement.

Submit
116. វិធីសាស្ត្រព្យាបាល Ameloblastoma គឺ៖?

Explanation

The correct answer is "វះកាត់ចោល (Resection)". This is the most common and effective treatment for ameloblastoma, which is a type of benign tumor that affects the jaw. Resection involves surgically removing the tumor and a portion of the surrounding healthy tissue to ensure complete removal and prevent recurrence. Other treatment options such as chemotherapy, enucleation, and radiation therapy may be used in certain cases, but resection is generally considered the primary treatment approach.

Submit
117. Necrotizing ulcerative gingivitis affects MAINLY the

Explanation

Necrotizing ulcerative gingivitis mainly affects the gingival papillae. This condition is characterized by the rapid destruction of gum tissue, leading to painful ulcers and necrosis. The gingival papillae are the triangular-shaped gum tissue located between the teeth. They are particularly susceptible to this condition due to their close proximity to dental plaque and bacteria, which can cause an inflammatory response and tissue damage.

Submit
118. Which teeth are responsible for tearing food?

Explanation

Canines are responsible for tearing food because they have long, sharp, and pointed edges that are designed to grip and tear into food. They are particularly effective in tearing meat and other tough substances. Molars, on the other hand, are responsible for grinding and chewing food. Central incisors and premolars also play a role in biting and chewing, but they are not specifically designed for tearing.

Submit
119. តើ Zince phosphate cement , មានលក្ខណះសម្បតិ្តអី្វខ្លះ ដែលអាចឲគេយកវាមកប្រើជា luting agent ? 1. ភាពមិនជ្រាបទឹក 2. ប្រឆាំងនិងការមាន Carie 3. ការភ្ជាប់ជាលក្ខណះគីមី 4. ការទាក់ជាប់ជាលក្ខណះមេកានិច

Explanation

Zinc phosphate cement can be used as a luting agent because it has the ability to bond to both enamel and dentin surfaces. It forms a strong and durable bond, making it suitable for cementing restorations such as crowns and bridges. Additionally, zinc phosphate cement has good biocompatibility and is resistant to dissolution in oral fluids. Therefore, it is an effective choice for luting agents in dental applications.

Submit
120. ក្មេងអាយុ៧ឆ្នាំ ទើបនឹងបាក់ធ្មេញអចិន្រ្ដៃយ៏មុខកណ្ដាលលើ១ ដោយសារការប៉ះទង្គិច។ ធ្មេញបាត់រកមិនឃើញ។ ការព្យាបាលជាជំរើសនោះគឺ៖ 1. order a chest -ray. 2. place an implant. 3. maintain space with a removable appliance. 4. observe and measure the space for 6 months.

Explanation

The correct answer is (1) and (3) because ordering a chest X-ray and maintaining space with a removable appliance are appropriate steps to take when a 7-year-old child loses a primary tooth due to trauma. A chest X-ray is necessary to rule out any aspiration or ingestion of the tooth, while a removable appliance helps to maintain the space for the permanent tooth to erupt properly.

Submit
121. Compomer restorative materials are:?

Explanation

Compomer restorative materials are resin systems that contain fluoride-containing glasses. These materials are a combination of composite resin and glass ionomer, providing the benefits of both materials. The resin system allows for better esthetics and strength, while the fluoride-containing glasses help to release fluoride ions, providing additional protection against tooth decay. Compomers are commonly used in dental restorations to provide a durable and aesthetically pleasing solution.

Submit
122. សមាសធាតុ Amalgam ដែលមានជាតិស្ពាន់ (Copper) ខ្ពស់ គឺជាលោហះធាតុផ្សំ ដែលមានគុណភាព ខ្ពស់ហើយងាយប្រើ ដោយសារ៖? 1. ភាពគ្រើមមានតិចតួច 2. ភាពសឹកតិចតួច 3. ការបែកបាក់តាមគែមបិទមានតិចតួច 4. 1 ម៉ោង ក្រោយបិទភាពរឹងមានកំរិតខ្ពស់កើនឡើង?

Explanation

The correct answer is (4) because amalgam is a high-strength dental material that is commonly used for fillings. It is durable and can withstand the pressure of chewing for a long time.

Submit
123. Swelling related to increased tissue fluid is called

Explanation

Edema refers to the swelling caused by an abnormal accumulation of fluid in the body's tissues. This can occur due to various reasons such as inflammation, injury, or underlying medical conditions like heart failure or kidney disease. When there is an increase in tissue fluid, it leads to the swelling known as edema. Thrombosis, hematoma, embolism, and surgical emphysema are unrelated to the accumulation of tissue fluid and do not cause swelling.

Submit
124. When maxillary premolars have two roots where are they placed ?

Explanation

Maxillary premolars typically have two roots, with one root positioned buccally (towards the cheek) and the other root placed lingually (towards the tongue). This placement of roots allows for stability and support of the tooth within the dental arch.

Submit
125. នៅពេលហើមមានការឈឺ ពិបាកទំពារ trismus និងការផ្លាស់ទីរបស់ក្រឡើត។ តើទាំងនេះជាសញ្ញានៃការបង្ករមេរោគនៅតំបន់ណា?

Explanation

The correct answer is "Lateral parapharyngeal". Trismus refers to the condition of having difficulty in opening the mouth due to muscle spasm. The lateral parapharyngeal region is located on the side of the pharynx, near the jaw joint. In cases of trismus, the muscles in this region may become affected, leading to limited mouth opening. The other options, such as submandibular, sublingual, deep temporal, and submasseteric, are not directly related to trismus.

Submit
126. នៅក្នុងការព្យាបាលជាលិការជំវិញធ្មេញ ការច្រិបយកអញ្ចាញចេញ (gingivectomy) គឺជាការព្យបាលជាជំរើស ដើម្បីបំបាត់ ៖

Explanation

Gingivectomy is a surgical procedure performed to remove excess gum tissue and reshape the gums. It is commonly done to eliminate suprabony pockets, which are pockets of gum tissue that extend above the level of the underlying bone. This procedure helps to reduce the depth of the pockets and improve oral hygiene. The other options listed, such as osseous craters, infrabony pockets, root hypersensitivity, and inadequate attached gingiva, are not directly related to the purpose of gingivectomy.

Submit
127. Loose enamel rods at the gingival floor of a class II amalgam cavity should be removed using :?

Explanation

The correct answer is Gingival marginal trimmer. This tool is specifically designed to remove loose enamel rods at the gingival floor of a class II amalgam cavity. It has a curved blade that allows for precise and controlled trimming of the enamel. The other options, such as the straight chisel, hatchet, and gingival curette, are not suitable for this purpose and may cause damage to the surrounding tooth structure.

Submit
128. Which of the following is contagious?

Explanation

Acute herpetic gingivostomatitis is a contagious condition caused by the herpes simplex virus. It is characterized by painful sores and blisters in the mouth and on the gums. The virus can be easily transmitted through direct contact with the sores or through saliva. Pemphigus, recurrent aphthous stomatitis, and acute necrotizing ulcerative gingivitis are not contagious conditions.

Submit
129. The maxillary first premolar has which of the following characteristics for differentiation from other anterior teeth ?

Explanation

The correct answer is "Anterior teeth crown a longer than the maxillary premolar crown." This means that the crowns of the anterior teeth are longer in size compared to the crown of the maxillary premolar. This characteristic can be used to differentiate the maxillary first premolar from the other anterior teeth.

Submit
130. អ្នកជំងឺទឹកនោមផ្អែមម្នាក់ ភេទប្រុស អាយុ 22ឆ្នាំ មកគ្លីនិក របស់អ្នក។ គាត់មានការគ្រប់គ្រងជាតិ insulin បានល្អ ប៉ុន្តែក្រោយពីចាក់ថ្នាំស្ពឹក lidocain ដែលមានចំនុះ1,8ml កំហាប់ 2% និងមានជាតិ epinephrine 1: 10000 រួចមក គាត់មានអារម្មណ៍វីលមុខ និងខ្សោយ។ គាត់មានសភាពស្លេកស្លាំងទោះបីគេដាក់ស្ករលើថ្ងាស់និង បបូមាត់ខាងលើរបស់គាត់ក៏ដោយ។ វិធីចំបងក្នុងការគ្រប់គ្រងអ្នកជំងឺនេះនៅពេលនេះគឺ៖

Explanation

The patient is experiencing an anaphylactic reaction, as evidenced by the symptoms of difficulty breathing, swelling, and hives. The first step in managing anaphylaxis is to ensure the patient's airway is open and provide them with supplemental oxygen. Administering 100% oxygen will help improve the patient's oxygenation and alleviate their respiratory distress. This is the most immediate and essential intervention to ensure the patient's survival.

Submit
131. តំហែទាំលើអ្នកជំងឺដែលបានព្យាបាលជំងឺជាលិការជំវិញឬសធ្មេញ រួមបញ្ចូលទាំងការប៉ាន់ប្រមាណមើល ដោយទៀងកំណត់ពេលនូវ ៖ 1. tooth mobility. 2. gingival sulcus depth. 3. signs of gingival inflammation. 4. oral hygiene status.

Explanation

The correct answer is (1) , (2) និង (3) ត្រឹមត្រូវ. This is because tooth mobility, gingival sulcus depth, and signs of gingival inflammation are all important factors to consider when assessing the periodontal health of a patient. These indicators can help determine the severity of the disease and guide appropriate treatment planning. Oral hygiene status, although important, may not directly indicate the presence or severity of periodontal disease.

Submit
132. Removal of Undermined Enamel in Class II cavity is done by :?

Explanation

The removal of undermined enamel in a Class II cavity is done using a chisel. A chisel is a dental instrument with a sharp, flat blade that is used to remove decayed or undermined enamel and dentin. It is commonly used in restorative dentistry procedures to prepare the tooth for filling or restoration. The chisel's sharp edge allows for precise and controlled removal of the undermined enamel, ensuring that the tooth is properly cleaned and prepared for further treatment.

Submit
133. អវត្តមាននៃ pulp chamber របស់ធ្មេញ primary maxillary incisor ភាគច្រើនមានមូលហេតុមកពី៖?

Explanation

The presence of pulp chamber abnormalities in primary maxillary incisors can be caused by trauma. Trauma to the tooth can lead to damage or inflammation of the pulp chamber, resulting in abnormalities. Amelogenesis imperfecta, hypophosphatasia, ectodermal dysplasia, and cleidocranial dysostosis are conditions that can affect tooth development and structure, but they are not directly related to trauma.

Submit
134. Which of the following is true regarding sublingual keratosis:

Explanation

Sublingual keratosis is a condition characterized by thickening and white patches on the mucous membranes beneath the tongue. It is considered a potentially premalignant lesion, meaning that it has a high rate of transforming into cancer. Therefore, individuals with sublingual keratosis should be closely monitored and undergo regular check-ups to detect any signs of malignant transformation. This is important in order to provide early intervention and prevent the progression to oral cancer.

Submit
135. When viewed from buccal aspect the form of the maxillary first premolar is ?

Explanation

The correct answer is pentagonal because when viewed from the buccal aspect (the side facing the cheek), the maxillary first premolar has five sides, resembling a pentagon shape.

Submit
136. តើសាច់ដុំាណាមួយ ដែលនៅក្រាលនៅបាតរបស់មាត់ មនុស្សយើង?

Explanation

The mylohyoid muscle is located in the floor of the mouth. It is responsible for elevating the hyoid bone and assisting in swallowing and speaking. The other muscles listed (stylohyoid, digastric, platysma, geniohyoid) are also muscles involved in the movement of the hyoid bone, but they are not specifically located in the floor of the mouth like the mylohyoid muscle.

Submit
137. តើរយៈពេលប៉ុណ្ណាដែលបាក់តេរីនៅក្នុងផ្លាក បង្កើតជាអាស៊ីតចេញពី sucrose?

Explanation

Sucrose, a disaccharide composed of glucose and fructose, is broken down by the enzyme sucrase into its constituent monosaccharides. The time it takes for sucrase to break down sucrose can vary depending on several factors, including the concentration of sucrase, temperature, and pH. In general, it takes approximately 30 minutes to 1 hour for sucrase to completely break down sucrose into glucose and fructose.

Submit
138. Which of the following materials has been shown to simulate reparative dentine formation most effectively when applied to the pulpal wall of a very deep cavity:?

Explanation

Calcium hydroxide preparation has been shown to simulate reparative dentine formation most effectively when applied to the pulpal wall of a very deep cavity. This is because calcium hydroxide has the ability to stimulate the formation of secondary dentine, which helps to protect and strengthen the tooth. It also has antimicrobial properties, which can help prevent further decay or infection in the tooth. In comparison, Copalite varnish, Zinc phosphate cement, and Anhydrous class inomer cement do not have the same reparative properties as calcium hydroxide.

Submit
139. នៅពេលធ្មេញថ្គាមធំត្រូវបានតម្រង់ត្រង់ ហើយត្រូវប្រើប្រាស់ធ្វើជាបង្គោលទ្រស្ពាន (bridge abutment) បញ្ហាសំខាន់ផ្សេងៗទៀតគឺផ្តោតទៅលើ៖?

Explanation

នៅពេលធ្មេញថ្គាមធំត្រូវបានតម្រង់ត្រង់ ហើយត្រូវប្រើប្រាស់ធ្វើជាបង្គោលទ្រស្ពាន (bridge abutment) បញ្ហាសំខាន់ផ្សេងៗទៀតគឺផ្តោតទៅលើ៖ ទីតាំង ឬលក្ខណៈនៃជាលិកាជុំវិញឬសធ្មេញ, ផ្ទៃផ្នែក Vertical ផ្លាស់ប្តូរដោយសារ ពកស្រួចនៃថ្គាមធំ, លំហនៅសល់សំរាប់ធ្វើធ្មេញបណ្តែត (Pontic), ធ្លាប់ប្រើប្រាស់ធ្វើជាបង្គោល Fixed appliance.

Submit
140. The following condition may be associated with iron deficiency anemia except :

Explanation

Iron deficiency anemia is caused by a lack of iron in the body, leading to decreased production of red blood cells. Multiple myeloma, a type of cancer that affects plasma cells in the bone marrow, is not directly associated with iron deficiency anemia. Burning mouth syndrome, angular cheilitis, xerostomia, and atrophic glossitis are conditions that can be associated with iron deficiency anemia as they may occur as a result of the decreased oxygen-carrying capacity of the blood due to low iron levels.

Submit
141. Which statement is correct about permanent maxillary first molar ?

Explanation

The correct answer is "Crown is wider buccolingually than mesiodistally". This means that the width of the tooth's crown from the cheek side to the tongue side is greater than its width from the front side to the back side. This is a characteristic feature of the permanent maxillary first molar.

Submit
142. ក្មេងអាយុ 8ឆ្នាំ ម្នាក់មានប្រឡោះច្នោចនៅធ្មេញមុច ប្រវែង 8mm តើមកពីមូលហេតុអ្វីខ្លះដែលអាចបណ្ដាលវាកើតមានឡើង? 1. ហ្រ្វាំងមាត់ 2. គីស 3. ធ្មេញ mesiodens 4. ជាការលូតលាស់ធ្មេញ

Explanation

The correct answer is (1), (2), and (3) because a mesiodens is a supernumerary tooth that can cause crowding and displacement of other teeth. In this case, the child has a mesiodens, which is a small, extra tooth that has erupted in the midline of the maxilla. This can lead to crowding and displacement of the other teeth, causing the overbite. Braces (1) and extraction (2) are common treatments for correcting crowding and misalignment of teeth, while removing the mesiodens (3) can also help alleviate the overbite.

Submit
143. អញ្ចាញមានហូរឈាម និងធ្មេញធូរលុង អាចរួមបញ្ចូលនឹងការខ្វះនៃៈ

Explanation

The presence of gums and mucilage in fruits and vegetables can interfere with the absorption of ascorbic acid. These substances can bind to the ascorbic acid molecules and prevent them from being absorbed into the bloodstream. This can reduce the bioavailability of ascorbic acid and limit its ability to provide its antioxidant and other beneficial effects in the body.

Submit
144. What can we use under composite restoration:?

Explanation

Composite restoration is a dental procedure that involves using a tooth-colored resin material to repair a decayed or damaged tooth. The options given in the question refer to different dental materials that can be used for restoration. Among the options, Ca (OH), which stands for calcium hydroxide, is not commonly used for composite restoration. Calcium hydroxide is typically used as a liner or base material in dental procedures to promote the formation of dentin and protect the pulp. Therefore, it is not suitable for composite restoration, making it the correct answer.

Submit
145. កំរិតប្រើធម្មតានៃថ្នាំ Codeine លេប សម្រាប់មនុស្សពេញវ័យ គឺ៖?

Explanation

The correct answer is 30 - 60 mg. This is the recommended dosage of Codeine for adults.

Submit
146. The differences between Causative factor and contributing factor :

Explanation

A causative factor is a trigger point that directly leads to the development of a disease. It is the primary factor responsible for causing the disease. On the other hand, a contributing factor is a factor that alone cannot cause the disease but can increase the likelihood of its occurrence. It plays a secondary role in the development of the disease, usually in combination with other factors.

Submit
147. The oblique ridge is found in permanent maxillary first molar that crosses the occlusal surface obliquely. It is formed by the union of ?

Explanation

The oblique ridge is formed by the union of the triangular ridge of the distobuccal cusp and the distal ridge of the mesiolingual cusp in the permanent maxillary first molar. This ridge crosses the occlusal surface obliquely.

Submit
148. ការព្យាបាលដែលសមស្របបំផុត ក្រោយពីការដកធ្មេញ ធ្គាមទឹកដោះ ទី1 ចំពោះក្មេងអាយុ 4ឆ្នាំ នោះគឺៈ

Explanation

The correct answer suggests the use of a space maintainer after the removal of the primary tooth. A space maintainer is a dental appliance that helps to keep the space open and prevent the surrounding teeth from shifting into the empty space. This is important for children around the age of 4, as it allows the permanent tooth to erupt properly without any alignment issues. Additionally, monitoring the eruption of the permanent tooth and removing any retained primary teeth are also essential steps in maintaining proper dental health.

Submit
149. The Fluorosis Inde ត្រូវបានប្រើដើម្បីវាស់៖

Explanation

The correct answer is "degree or severity of mottled enamel." This is because fluorosis is a condition caused by excessive intake of fluoride, which leads to the appearance of white or brown stains on the teeth. The degree or severity of mottled enamel refers to how noticeable or extensive these stains are on the teeth. The other options are not directly related to fluorosis or its effects on the teeth.

Submit
150. To prevent discoloration under amalgam filling:?

Explanation

Cavity varnish is used to prevent discoloration under amalgam filling. It is a thin layer of protective coating that is applied to the cavity walls before placing the amalgam filling. This varnish acts as a barrier, preventing any discoloration or staining of the tooth structure caused by the components of the amalgam filling. By using cavity varnish, the dentist ensures that the tooth remains aesthetically pleasing and free from any discoloration after the filling procedure.

Submit
151. តើថ្នាំមួយណាដែលគេប្រើសម្រាប់បំបាត់ការឈឺចាប់៖? 1. Benzodiazepines 2. Barbiturates 3. Narcotic analgesics"

Explanation

The correct answer is (3) ត្រឹមត្រូវ, which translates to "appropriate" in English. This answer suggests that there is a specific medication that is used for treating the mentioned condition, but it does not specify which medication it is. The question asks for the medication used to treat a particular condition, and the correct answer indicates that there is a medication that is suitable for this purpose.

Submit
152. Patient lost their tooth in 2 ways:

Explanation

The patient lost their tooth due to a combination of microorganism and trauma. This means that the tooth was affected by both a microtrauma, which could be a small injury or damage, and a physical injury. It is likely that the microorganism caused some sort of infection or decay in the tooth, weakening it, and then the trauma, whether it was a physical blow or injury, caused the tooth to be lost.

Submit
153. When we observe from buccal aspect, in permanent mandibular first molar, the point of furcation of the two roots is located approximately?

Explanation

When observing from the buccal aspect, the point of furcation of the two roots in the permanent mandibular first molar is located approximately 3mm below the cervical line.

Submit
154. តើជំងឺទូទៅណាមួយ ដែល/ឬ មិនបណ្ដាលដោយមានជំងឺ រលាកជុំវិញជាលិការ ធ្មេញ 1. ជំងឺដែលមាន neutrophil ធ្លាក់ចុះ 2. ទឹកនោម ផ្អែម 3. ជំងឺ អេដស៏ 4. Hereditary hypohydrotic ectodermal dysplasia

Explanation

The correct answer is (4) Hereditary hypohydrotic ectodermal dysplasia. This is because the question asks for a disease that is not associated with neutrophil migration, excessive sweating, or inflammation. Hereditary hypohydrotic ectodermal dysplasia is a genetic disorder that affects the development of teeth, hair, and sweat glands, leading to a reduced ability to sweat. Therefore, it is the only option that fits the criteria given in the question.

Submit
155. តើណាមួយនៃ cells ខាងក្រោមដែលជា immunologic response ទៅនឹង plaque នៅក្នុង sulcus កើតឡើងនៅក្នុងករណីរលាគរាំរ៉ៃ នៃជំងឺជាលិកាជំវិញធ្មេញ? 1. Mast cells. 2. Macrophages. 3. Plasma cells. 4. Neutrophils. 5. Lymphocytes.

Explanation

In the case of chronic periodontitis, the immune response plays a crucial role in the development of plaque in the sulcus. Macrophages, plasma cells, and lymphocytes are all involved in the immunologic response. Macrophages are responsible for phagocytosis and the release of inflammatory mediators. Plasma cells produce antibodies to fight against the bacteria in the plaque. Lymphocytes, including T cells and B cells, are involved in the adaptive immune response. Therefore, options (2), (3), and (5) are all correct as they all contribute to the immunologic response in the development of plaque in the sulcus.

Submit
156. Class II composite resin is lined by:?

Explanation

Class II composite resin is lined by G.I. (glass ionomer) because G.I. has properties that make it suitable for use as a liner in composite resin restorations. G.I. can release fluoride, which helps to prevent secondary caries and promotes remineralization of the tooth structure. It also has good adhesion to both the composite resin and the tooth structure, providing a seal that helps to prevent microleakage and bacterial infiltration. Additionally, G.I. has a similar coefficient of thermal expansion to tooth structure, reducing the risk of postoperative sensitivity.

Submit
157. សាច់ដុំដែលភ្ជាប់ទៅនឹងផ្ទៃសងខាង labial surface of the maxilla តំបន់នៃធ្មេញមុខ គឺជា៖?

Explanation

The correct answer is Orbicularis oris because it is the muscle that surrounds the mouth and controls the movements of the lips. It is responsible for closing and puckering the lips, as well as helping with speech and facial expressions. The other muscles listed, such as Labii inferioris and Labii superioris, are also muscles of the lips, but they do not specifically connect to the labial surface of the maxilla region.

Submit
158. Stress from microtrauma results from:

Explanation

Stress from microtrauma occurs when there is repeated occlusal overload on the teeth. This means that the teeth are constantly being subjected to excessive force or pressure, which can lead to damage and injury over time. This can happen due to various reasons such as grinding or clenching of the teeth, misalignment of the bite, or habits like chewing on hard objects. The constant stress on the teeth can result in microtrauma, which can cause tooth fractures, cracks, or even tooth loss if not addressed. Root canal treated teeth and accidents/head injuries can also cause stress and trauma, but the specific cause mentioned in the question is repeated occlusal overload.

Submit
159. Which of the following roots is the largest permanent maxillary first molar ?

Explanation

The lingual root is the largest permanent maxillary first molar root because it is located towards the back of the tooth and extends further down into the jawbone compared to the other roots. This root is also responsible for providing stability and support to the tooth.

Submit
160. ការថត Lateral cephalometric radiograph នៅខាងអ្នកជំងឺដែលមានធ្មេញងាក 3mm នោះការថតគួរធ្វើឡើង ដោយអោយអ្នកជំងឺ

Explanation

The correct answer is "ប៉ះផ្ទាល់" (occlusal plane). The lateral cephalometric radiograph is taken to assess the skeletal and dental relationships of the patient. The occlusal plane is an important reference point in analyzing the position and angulation of the jaws and teeth. By aligning the occlusal plane parallel to the horizontal reference line, accurate measurements and evaluations can be made to determine the appropriate treatment plan for the patient.

Submit
161. វត្ថុរាវនៃអញ្ចាញធ្មេញ(Gingival crevicular fluid = gingival fluid) ៖

Explanation

The correct answer is "is a transudate and is an eudate." This means that the gingival crevicular fluid is both a transudate and an exudate. A transudate refers to a fluid that has passed through a membrane or tissue due to a pressure gradient, while an exudate is a fluid that has been released from blood vessels due to inflammation or injury. Therefore, the gingival crevicular fluid is a combination of both types of fluids.

Submit
162. Calcium hydroxide is used in deep cavity because it is:?

Explanation

Calcium hydroxide is used in deep cavity because it can stimulate the formation of second dentine. Second dentine is a protective layer that forms in response to dental damage or decay. By applying calcium hydroxide, it can promote the growth of this dentine layer, which helps to protect the pulp and prevent further damage to the tooth. This makes it an effective material for treating deep cavities.

Submit
163. ភាពធម្មតានៃ Sulcular epithelium របស់មនុស្សប្រុស គឺ៖ 1. Nonkeratinized 2. Squamous 3. Stratified"?

Explanation

The correct answer is (1), (2), and (3) are all correct. The sulcular epithelium in males is nonkeratinized, squamous, and stratified.

Submit
164. Any Condition that prevents thorough cleaning of any tooth surface or portion of the sulcus should be consider as a :

Explanation

A causative factor refers to any condition that directly causes or contributes to the development of a particular outcome or condition. In this case, any condition that prevents thorough cleaning of a tooth surface or portion of the sulcus can directly contribute to the development of oral health issues. Therefore, it can be considered a causative factor.

Submit
165. When we see from the buccal aspect in the permanent maxillary first molar, the point of furcation of the two buccal roots is located approximately?

Explanation

When viewing the permanent maxillary first molar from the buccal aspect, the point of furcation of the two buccal roots is located approximately 4mm below the cervical line.

Submit
166. ការវិវត្ដន៏ លឿននៃជំងឺរលាក ជាលិកាជុំវិញ អញ្ចញ គឺ៖ 1. ការបាតបង់ឆ្អឹង លឿន 2. មេរោគដែលបង្ករជំងឺអញ្ចញ 3. ការចាប់ផ្ដើមវិវត្តន៏ ជំងឺនេះនៅអាយុ 35 ឆ្នាំ 4. មានដំបៅអញ្ចញ

Explanation

The correct answer is (1), (2), and (3) because the passage states that the symptoms of the disease include rapid breathing, severe coughing, and the disease typically starts at the age of 35. This aligns with options (1), (2), and (3) which mention rapid breathing, severe coughing, and the age of onset respectively. Option (4) does not align with any of the symptoms mentioned in the passage.

Submit
167. បន្ទាប់ពីផ្ទៃមុខធ្មេញត្រូវបានសំអាតយ៉ាងស្អាតបាត mucoprotein ថ្មីបានក្រាលពាសពីលើ ដែលបង្កើតឡើងនៅលើផ្ទៃមុខធ្មេញ ដែលហៅថា ៖

Explanation

The correct answer is "pellicle". A pellicle is a thin film that forms on the surface of the tooth, composed of mucoproteins. It is formed by the adsorption of salivary proteins onto the tooth surface, providing a protective layer against acids and bacteria.

Submit
168. Patient feel pain of short duration after class II restoration. Diagnosis is:?

Explanation

The patient's pain after a class II restoration is of short duration, indicating that it is reversible pulpitis. Reversible pulpitis is characterized by temporary inflammation of the dental pulp due to irritation, but the pulp is still vital and can recover. Hyperemia refers to increased blood flow to the pulp, which can cause pain. Irreversible pulpitis, periodontitis, and abscess would typically present with more persistent pain and indicate more severe damage or infection.

Submit
169. ការថយចុះកំរិតជាតិស្ករក្នុងឈាមគឺបង្ហាញឲ្យឃើញតាមសញ្ញាគ្លីនិក 1. អារម្មណ៏ច្របូកច្របល់ (Mental confusion) 2. ចង្វាក់បេះដូងដើរញាប់ (tachycardia) 3. បែកញើសខ្លាំង (Sweating) 4. ចង្អោរ (Nausea)"?

Explanation

The correct answer is (4) because nausea is a symptom commonly associated with motion sickness. Mental confusion, tachycardia (rapid heart rate), and sweating are also symptoms of motion sickness, so options (1), (2), and (3) are also correct. Therefore, the answer is that all of the options are correct.

Submit
170. The use of long-term retainers to maintain post-orthodontic tooth alignment could be dramatically reduced if :

Explanation

If occlusal principles were better understood, it would mean that dentists and orthodontists have a better understanding of how the teeth should align and function together. This would allow them to create more effective treatment plans and orthodontic appliances, resulting in better long-term tooth alignment. With improved knowledge of occlusal principles, the need for long-term retainers to maintain post-orthodontic tooth alignment could be significantly reduced.

Submit
171. Crown shape from occlusal aspect of permanent mandibular first molar is?

Explanation

The crown shape from the occlusal aspect of the permanent mandibular first molar is pentagonal. This means that when looking at the tooth from the top, it has a shape with five sides. This is a characteristic feature of the mandibular first molar, distinguishing it from other teeth in the mouth. The pentagonal shape helps to provide stability and efficient function during chewing and grinding of food.

Submit
172. ពេលយកពុម្ភធ្មេញពីមាត់ អ្នកជំងឺ ជួនកាលមានម្សៅធ្លាក់ចូលបំពង់ករ ដែលធ្វើអោយអ្នកជំងឺ ក្អក និង ពិបាក ដកដង្ហើម & អ្នកគួរតែ៖

Explanation

not-available-via-ai

Submit
173. តើណាមួយនៃ fibers ខាងក្រោមដែលបង្កើត gingival collar (cuff)?

Explanation

The fibers that create the gingival collar (cuff) are circular in shape.

Submit
174. Rampant caries in adult in anterior teeth restored by:?

Explanation

Glass ionomer is the correct answer for restoring rampant caries in adult anterior teeth. Glass ionomer is a dental material that is commonly used for restorations in areas with high caries risk or for patients with poor oral hygiene. It releases fluoride, which helps to prevent further decay, and has good adhesion to tooth structure. Additionally, glass ionomer has a tooth-like appearance and can be easily matched to the natural color of the teeth, making it an ideal choice for anterior restorations.

Submit
175. ភាពធ្ងន់ធ្ងរនៃជំងឺជាលិកាជុំវិញឬសធ្មេញវាអាស្រ័យទៅលើ៖?

Explanation

The correct answer is (1) (2) and (3). The question asks for the factors that contribute to the severity of an infectious disease. The explanation states that the resistance of the host (1), the virulence of the organism (2), and the number of organisms present (3) all play a role in determining the severity of the disease. Therefore, all three factors are correct.

Submit
176. The #1 factor associated with discomfort within masticatory system structures. This includes pain/discomfort in the musculature, the teeth, and the region of the temporomandibular joints (TMJs).

Explanation

Occlusal disease refers to any condition that affects the alignment and function of the teeth and jaws. It can cause discomfort within the masticatory system structures, including pain or discomfort in the muscles, teeth, and temporomandibular joints (TMJs). This suggests that occlusal disease is the primary factor associated with discomfort in these structures. Temporomandibular disorder (TMD) specifically refers to issues with the TMJs, while muscle pain and articular pain are more general terms that can be caused by various factors, including occlusal disease. Therefore, occlusal disease is the most fitting answer.

Submit
177. Crown shape from buccal aspect of permanent mandibular first molar is?

Explanation

The crown shape from the buccal aspect of the permanent mandibular first molar is a trapezoid. This means that when viewed from the front, the crown of the tooth has four sides, with the top and bottom sides being parallel to each other and the other two sides slanting inward. This shape is characteristic of the mandibular first molar and helps in identifying and classifying the tooth.

Submit
178. ក្មេងប្រុសអាយុ 12ឆ្នាំ ម្នាក់ មានclass II molar relationship ហើយមានទំលាប់ បៀមមេដៃលេង 2 គាត់មាន SNA 830, SNB= 790 . មូលហេតុដែលគាត់មាន malocclusion គឺ៖

Explanation

The given information states that the individual has a class II molar relationship, with SNA of 830 and SNB of 790. A class II molar relationship indicates that the upper first molar is positioned more anteriorly than the lower first molar. This can result in malocclusion, specifically an overbite or overjet. The correct answer states that the individual has an overbite and an overjet, which aligns with the information provided.

Submit
179. ជំងឺជាលិកាជំវិញឬសធ្មេញរាំរ៉ៃ បង្ហាញលក្ខណះជា៖ (Chronic periodontitis is characterized as)

Explanation

Chronic periodontitis is characterized as inflammatory. This means that the condition involves inflammation of the gum tissues and supporting structures around the teeth. Inflammatory responses occur as a result of the body's immune system reacting to the presence of bacteria in dental plaque. Over time, this chronic inflammation can lead to the destruction of the gum tissues and bone that support the teeth, causing tooth loss if left untreated.

Submit
180. Cavity varnish should be applied at least in:?

Explanation

Cavity varnish should be applied at least in two layers because it provides a protective coating for the tooth surface. The first layer acts as a sealant, creating a barrier between the tooth and any potential irritants or bacteria. The second layer ensures a complete and thorough coverage, further enhancing the protective effect. Applying only one layer may not provide sufficient protection, while applying more than two layers may lead to excessive buildup and potential issues. Therefore, two layers of cavity varnish are recommended for optimal results.

Submit
181. ស្រ្តីវ័យចំណាស់ម្នាក់បានប្រើប្រាស់កំរិតជាតិភ្លុយអ័រសមល្មមក្នុងមួយជីវិតរបស់គាត់។ អ្នកគប្បីរំពឹងថា មានការថយចុះឧបទវហេតុនៃ៖ 1. ជំងឺឆ្អឹងរបស់លោក Paget (Paget’s disease of bone) 2. ជំងឺពុកឆ្អឹង (Osteoporosis) 3. ជំងឺលើសជាតិទីរ៉ូស៊ីន (hyperparathyroidism) 4. រោគពុកធ្មេញ (Dental caries)"?

Explanation

The correct answer is (2) and (4) because Paget's disease of bone and dental caries are both conditions that affect the bones. Osteoporosis is also a bone condition, but hyperparathyroidism is a condition that affects the parathyroid glands and not directly related to bone health. Therefore, the answer is (2) and (4) as they are the options that include bone-related conditions.

Submit
182. One noticeable characteristic of Attrition that present on enamel surface is:

Explanation

The correct answer is "Sharp edge of enamel." Attrition refers to the wearing down of tooth enamel due to factors such as grinding or clenching of teeth. This can lead to the formation of sharp edges on the enamel surface. The other options, smooth edge of enamel and both edges of dentin, are incorrect as they do not accurately describe the characteristic of attrition on enamel.

Submit
183. Anatomical crown of tooth is?

Explanation

The anatomical crown of a tooth refers to the portion of the tooth that is covered by enamel. Enamel is the hard outer layer of the tooth that protects the underlying dentin and pulp. Therefore, the correct answer is "Portion of tooth which is covered by enamel."

Submit
184. Lee way space នៅក្មេង អាយុ 8ឆ្នាំ ៖

Explanation

The mandible has a greater length of 3.5mm compared to the maxillary. This allows for more space and accommodation for the premolar teeth, which are larger than the incisors. The larger size of the premolars requires more room for eruption and growth, and the mandible provides this space. Additionally, the mandible undergoes more remodeling due to the forces exerted during chewing and biting, which may also contribute to its larger size compared to the maxillary.

Submit
185. An acute lateral periodontal abscess អាចមានការខុសប្លែកគ្នាពី an acute abscess of pulpal origin ដោយសារ៖

Explanation

An acute lateral periodontal abscess can be distinguished from an acute abscess of pulpal origin by its response to a vitality test. In an acute lateral periodontal abscess, the affected tooth will still respond to a vitality test, indicating that the pulp is still vital. On the other hand, in an acute abscess of pulpal origin, the affected tooth will not respond to a vitality test, indicating that the pulp is necrotic. Therefore, the response to a vitality test is a key factor in differentiating between these two types of abscesses.

Submit
186. The spontaneous production of an electric current resulting from two dissimilar metal in the oral cavity is called:?

Explanation

Galvanic action refers to the spontaneous production of an electric current that occurs when two dissimilar metals come into contact in the oral cavity. This phenomenon is commonly observed in dental restorations, where different metals are used in close proximity. The galvanic action can lead to the generation of an electric current, which can cause discomfort or even damage to the oral tissues. Therefore, it is important for dentists to consider the potential for galvanic action when selecting materials for dental restorations.

Submit
187. Propylthiouracil ជាឱសថម្យ៉ាងដែលប្រើប្រាស់សំរាប់ព្យាបាលជំងឺ៖?

Explanation

Propylthiouracil is used to treat hyperthyroidism, a condition where the thyroid gland produces too much thyroid hormone. It works by inhibiting the production of thyroid hormones in the thyroid gland.

Submit
188. One noticeable characteristic of Erosion that present on enamel surface is :

Explanation

The correct answer is "Smooth edge of enamel". This is because erosion on the enamel surface causes the edges to become smooth. Erosion is the gradual wearing away of the tooth enamel due to acid exposure, and it can result in the loss of the rough texture and edges on the enamel surface. This smoothness is a characteristic feature of enamel erosion.

Submit
189. Clinical crown of tooth is ?

Explanation

The clinical crown of a tooth refers to the portion of the tooth that is visible in the mouth. It does not include the portion of the tooth that is covered by gum tissue or any dental restorations such as fillings or crowns. The clinical crown is important in dental evaluations and treatments as it helps determine the overall health and condition of the tooth.

Submit
190. Osteomyelitis នៅឆ្អឹង mandible កើតក្រោយពីមាន ៖ 1. ការព្យាបាលដោយកាំរស្មី 2. Dento alveolar abscess 3. បាក់ឆ្អឹង 4. Vincen’s angina

Explanation

The correct answer is (1) and (3) because osteomyelitis is an infection of the bone, and in this case, it is specifically in the mandible. The options (2) and (4) are not related to osteomyelitis. Dento alveolar abscess is an infection of the tooth and surrounding tissues, while Vincent's angina is a type of severe tonsillitis. Therefore, only options (1) and (3) are appropriate choices for the given question.

Submit
191. A furcation invasion ដែលក្នុងនោះឆ្អឹងស្រកដែលអនុញ្ញាតិឲ្យ probe ពង្វាតយ៉ាង ពេញទំហ៊ឹងឆ្លងកាត់ furcation ត្រូវបានគេចាត់ថ្នាក់ជាៈ(A furcation invasion in which bone loss allows the probe to etend completely through the furcation is classified as)

Explanation

A furcation invasion in which bone loss allows the probe to extend completely through the furcation is classified as Class III. This means that there is significant bone loss in the furcation area, allowing the probe to pass through completely. This is a more severe form of furcation invasion compared to Class I and Class II, which have less bone loss and less probe penetration. Incipient refers to early or beginning stages, while chronic refers to a long-lasting condition. Neither of these terms accurately describes the extent of bone loss and probe penetration in this scenario.

Submit
192. One week after filling of class II restoration, the post treatment present with a complain of tenderness on mastication and bleeding from the gingival. The dentist should initially:?

Explanation

After filling a class II restoration, it is common for patients to experience tenderness on mastication and bleeding from the gingival. Checking the contact area is important because it can help determine if there is any interference or high spot causing the discomfort. If the contact area is not properly adjusted, it can lead to irritation of the surrounding soft tissues and cause the symptoms mentioned. Therefore, checking the contact area is the initial step the dentist should take to address the patient's complaint.

Submit
193. One noticeable characteristic of Abrasion which cause by tooth brushing is :

Explanation

Abrasion caused by tooth brushing is mainly seen on the buccal surface at the cervical of the tooth. This means that the wearing away of tooth structure due to brushing is most commonly observed on the outer surface of the tooth, near the gum line. It is important to note that this type of abrasion is specifically related to tooth brushing and not other factors such as grinding or clenching of teeth.

Submit
194. នៅពេលធ្វើ Cervical cross sectionនៅលើ Maxillary central incisor, Pulp cavity មានរាង៖

Explanation

The correct answer is "ត្រីកោណ" because the question is asking about the shape of the pulp cavity in a cervical cross section of the maxillary central incisor. The shape of the pulp cavity in this section is triangular, resembling a triangle or a pyramid.

Submit
195. អ្នកជំងឺម្នាក់ចង់ដកធ្មេញដែលនៅសល់ទាំងរបស់គាត់ ដើម្បីធ្វើធ្មេញស្និត ពាក់វិញ។ ធ្មេញទាំងអស់នោះសុទ្ធតែពុកជ្រៅដល់គុម ធ្មេញ (dentition) ទាំងអស់ ប៉ុន្ដែ ជាលិកាជំវិញធ្មេញ គឺ ល្អ។វិធីគ្រប់គ្រង ដ៏ ល្អក្នុងពេលនេះគឺ 1. គោរពតាមការសំរេចចិត្ត របស់ជំងឺ 2. ទន្មានអ្នកជំងឺ អោយគាត់ទៅជួប អ្នក ឯកទេស 3. ពិភាក្សាជាមួយគាត់នូវជំរើសព្យាបាល ផ្សេងៗ ដ៏ទៃទៀតដែលសមស្របចំពោះគាត់ 4. បកេសេធន៍មិន ធ្វើការបញ្ចូនគាត់ទៅគ្រូពេទ្យផ្សេង ឬ មិនព្យាបាលគាត់តែម្ដង ព្រោះវាកាជាមិនសមរម្យ

Explanation

The correct answer is (1), (2), and (3) are all correct. This is because the passage mentions that the person wants to remove the teeth to make dentures and that all of their teeth are healthy. Therefore, the person can consider options like dental extraction based on the advice of a professional, consult with others who have undergone similar procedures, and conduct further research on various dental clinics and treatments. Option (4) is incorrect because the passage does not mention anything about the person's financial situation or their ability to afford dental treatment.

Submit
196. Benzodiazepines មានសកម្មភាពទាំអស់ខាងក្រោមនេះ លើកលែងតែ៖

Explanation

Benzodiazepines have various effects, including muscle relaxation, sedation, amnesia, and anticonvulsant action. However, they do not have analgesic properties, meaning they do not provide pain relief. Therefore, the correct answer is analgesia.

Submit
197. The function of the anterior teeth is:?

Explanation

The function of the anterior teeth is to incise food. Incising refers to the action of cutting or biting into food, which is primarily done by the front teeth. The anterior teeth, including the incisors and canines, have sharp edges and are positioned at the front of the mouth, making them well-suited for this task. They play a crucial role in the initial stages of digestion by breaking down food into smaller, more manageable pieces.

Submit
198. ការបង្កើនកំរិត radiographic density គឺបណ្តាលមកពី៖?

Explanation

The correct answer is "ការថយចុះនៃចម្ងាយពី target ទៅ object". This is because the radiographic density is directly influenced by the distance between the target and the object being imaged. The closer the object is to the target, the greater the radiographic density will be.

Submit
199. The union of the triangular ridge of the distobuccal cusp and the distal ridge of the mesiolingual cusp of maxillary molar forms the:

Explanation

The union of the triangular ridge of the distobuccal cusp and the distal ridge of the mesiolingual cusp of a maxillary molar forms the oblique ridge.

Submit
200. ក្នងចំនោមថ្នាំខាងក្រោម តើថ្នាំមួយានាដែលមានប្រសិទ្ធភាពជាង គេក្នុងការព្យាបាល Angular cheilosis ?"

Explanation

Nystatin is the correct answer because it is an antifungal medication commonly used to treat oral thrush, which is a fungal infection that can cause cheilosis (cracking and inflammation of the lips). The other options, penicillin, erythromycin, tetracycline, and clindamycin, are antibiotics and would not be effective in treating a fungal infection.

Submit
View My Results

Quiz Review Timeline (Updated): Mar 21, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Sep 22, 2020
    Quiz Created by
    Raksmey Pich
Cancel
  • All
    All (200)
  • Unanswered
    Unanswered ()
  • Answered
    Answered ()
In which one of the following, vesicles and bullae are not seen
The MOST COMMON problem arising from premature extraction of deciduous...
នៅលើ Maxilla តើធ្មេញមួយណាដែល...
អ្នកជំងឺម្នាក់ដែលប្រើប្រាស់ថ្នាំ...
Occlusal disease is the deformation or disturbances of function of any...
Proximal caries confined to enamel:?
Secondary dentine occur due to:?
Old patient came to replace all old amalgam filling he had sever...
តើវិធីណាមួយដែលគួរប្រើដើម្បីកាត់បន្ថយគ្រោះថ្នាក់នៃការប៉ះទៅនឹងចំហាយបារ៉ត...
Periodontal ligament fibers in the middle third of the root is:?
In the definition of epidemiology, 'distribution' refers to:
Muscles of facial expression are innervated by
Periodontally involved root surface must be root planed to:?
មនុស្សស្រីម្នាក់អាយុ២៩ឆ្នាំមានវត្តមាននៅក្នុងផ្នែកសង្គ្រោះបន្ទាន់...
ចូរជ្រើសរើសប្រភេទនៃជំងឺឆ្លងមួយ...
Spontaneous pulpal pain is indicative of:?
អ្នកជំងឺម្នាក់អាយុ...
គុណវិបត្តិចំបងរបស់ Cervical...
អ្នកជម្ងឺអាយុ ២៩ឆ្នាំ...
ស្នាមចុចៗជាច្រើន (Multiple...
ការប៉ះធ្មេញលើសរាងធ្មេញធម្មជាតិ...
What sizes of the sutures that commonly used in oral cavity?
តើ NOE Fracture...
For a patient of osteomyelitis who is allergic to penicillin, all of...
Which material has best biocompatibility Intraorally:?
នៅពេលប្រើ ultra high speed...
Fixation with pack in maxillary sinus is :
តើfiber groups PDL...
ការកន្រ្ដាក់នៃសាច់ដុំ...
Radiolucent lesions...
Insulin ផលិតមកពីក្រពេញមួយណា?
The following are the moderate allergy symptoms, except….
The following are the causes of difficult mask ventilation or...
Preoperative vit K is indicated in patients with:
ឃ្លាទី១ Eeccrine sweat...
ខាងក្រោមណាមួយជា Transient cessation of...
The Discussion section needs to follow from:
Writing your discussion should be:
What are three the type of morphology of denture teeth?
Permanent maxillary incisors ជាទូទៅ:
ការយកពុម្ពក្រាស់ធ្មេញស្និតផ្នែកក្រោម...
Division 1 of CN V is running from:
What are the limiting structures in maxillary in complete denture?
ធ្មេញធ្គាមទឹកដោះដែលផ្សាជាប់នឹងឆ្អឹង...
ស្ថានភាពនៃ periodontal...
ស្រី្តអាយុ ៣២ឆ្នាំ...
(7 y/o boy) came to the clinic in the right maxillary central incisor...
នៅពេលចាប់ធ្វើការសម្ភាសអ្នកជំងឺជាដំបូង...
ក្នុងការប្រកបវិជ្ជាជីវៈទន្តសាស្ត្រជាលក្ខណៈឯកជន...
តើជំងឺណាមួយដែលបង្ហាញលក្ខណៈដោយការថយចុះសកម្មភាពខួរឆ្អឹង?...
Treatment of choice to localized infection with pus is :
The component of dental plaque most responsible for its adhesiveness...
What is the different between Azithromycin and Clarithromycin?
ណាមួយដែលកំណត់ផ្នែកខាងក្រោយនៃ...
Which of the following is wrong about the management of angina...
គ្មានរោគសញ្ញា (Asymptomatic)...
Stomatitis ដោយសារ denture...
What is hamular notch?
ហើមហើយឈឺចាប់ខ្ទោកៗ (Intermittent...
ដំណាក់កាលដំបូងនៃការកកើតរោគពុកធ្មេញ...
How to clean and take away the follicle in the cervical of the tooth?
ធ្មេញមុខដែលមានការប្រែប្រួល...
Best selection of preventing abutments tooth of class I Kennedy from...
សកម្មភាពអូសបន្លាយរបស់សារជាតិ...
Excessive formation of scar tissue beyond the wound margin is called?
What happen to the tissue pH at the infection side?
A labial frenum បណ្ដាលឲ្យមាន diastema...
When designing palatal connectors, relief should be given for:
តើការបញ្ចេញហួសកំរិតនៃ...
The term applied to a low white blood cell count is
The term 'carcinoma in situ' implies that the lesion shows?
Giving the name of this flap
អ្នកជំងឺអាយុ 10ឆ្នាំ...
Which of the following would most clearly differentiate an acute...
ការប្រើប្រាស់ pins...
Which of the following is necessary to make a diagnosis of an...
Which of the following is NEVER associated with an impacted tooth?
Whis is the name of this incision?
ការបាត់បង់ធ្មេញចង្កូមទឹកដោះយ៉ាងលឿនមុនពេលកំណត់...
A 25 years-old male complained of many minute vesicles on the...
ការធ្វើ Cavity varnish ក្នុងការប៉ះ...
Papillary hyperplasia on the palate of a patient wearing a maxillary...
Which one of the following would be of greatest value in determining...
What is this surgical procedure
នៅលើ mandibular dental arch...
A patient presents with painless, bluish lump (10 mm in diameter) just...
Dysplastic lesions របស់ Squanmous epithelium...
A patient on broad spectrum antibiotics for four weeks presents with...
A 20-year old male presents with a three-day history of an acute...
How many level of Precaution of using antibiotic:
ការបៀមមេដៃ(Thumbsucking)នៅក្នុងករណីភាគច្រើនមិនបណ្ដាលឲ្យមានគ្រោះថ្នាក់ជា...
The EARLIEST apical radiographic change seen in a pulpally involved...
តើដុំពក (tumors)...
Which of the following conditions is an example of a mucous retention...
Hyperplastic lingual tonsils may resemble which of the following?
Clindamycin is in the group of:
មូលហេតុភាគច្រើនបំផុតដែលបណ្ដាលឲ្យមាន...
The drug most commonly used to treat trigeminal neuralgia is ?
ប្រភពរបស់ Metastic carcinoma...
Dentigerous cysts are usually found
A possible consequence for patients taking cyclosporine is?
What is the mycotic aneurysm?
តើណាមួយនៃខាងក្រោម...
An injection at the anterior border of the ramus of the mandible, a...
មូលហេតុចំបងដែលធ្វើអោយ pulp...
Hairy leukoplakia is caused by which of the following viruses?
A well circumscribed 3mm radiolucent lesion is present in the apical...
What is the Bactericidal antibiotic?
តើការប្រែប្រួលនៃ oral mucosa ណា១...
តើសញ្ញាគ្លីនីកណាមួយ...
Which oral condition predisposes to caries?
Physiologic (racial) pigmentation differs from melanoma because...
ដើម្បីមានភាពរឹងមាំល្អ...
តើនៅក្នុងណាមួយនៃស្ថានភាពដូចខាងក្រោម...
The following chemically bond to the tooth:?
វិធីសាស្ត្រព្យាបាល Ameloblastoma...
Necrotizing ulcerative gingivitis affects MAINLY the
Which teeth are responsible for tearing food?
តើ Zince phosphate cement ,...
ក្មេងអាយុ៧ឆ្នាំ...
Compomer restorative materials are:?
សមាសធាតុ Amalgam...
Swelling related to increased tissue fluid is called
When maxillary premolars have two roots where are they placed ?
នៅពេលហើមមានការឈឺ...
នៅក្នុងការព្យាបាលជាលិការជំវិញធ្មេញ...
Loose enamel rods at the gingival floor of a class II amalgam cavity...
Which of the following is contagious?
The maxillary first premolar has which of the following...
អ្នកជំងឺទឹកនោមផ្អែមម្នាក់...
តំហែទាំលើអ្នកជំងឺដែលបានព្យាបាលជំងឺជាលិការជំវិញឬសធ្មេញ...
Removal of Undermined Enamel in Class II cavity is done by :?
អវត្តមាននៃ pulp chamber...
Which of the following is true regarding sublingual keratosis:
When viewed from buccal aspect the form of the maxillary first...
តើសាច់ដុំាណាមួយ...
តើរយៈពេលប៉ុណ្ណាដែលបាក់តេរីនៅក្នុងផ្លាក...
Which of the following materials has been shown to simulate reparative...
នៅពេលធ្មេញថ្គាមធំត្រូវបានតម្រង់ត្រង់...
The following condition may be associated with iron deficiency anemia...
Which statement is correct about permanent maxillary first molar ?
ក្មេងអាយុ 8ឆ្នាំ...
អញ្ចាញមានហូរឈាម...
What can we use under composite restoration:?
កំរិតប្រើធម្មតានៃថ្នាំ...
The differences between Causative factor and contributing factor :
The oblique ridge is found in permanent maxillary first molar that...
ការព្យាបាលដែលសមស្របបំផុត...
The Fluorosis Inde...
To prevent discoloration under amalgam filling:?
តើថ្នាំមួយណាដែលគេប្រើសម្រាប់បំបាត់ការឈឺចាប់៖?...
Patient lost their tooth in 2 ways:
When we observe from buccal aspect, in permanent mandibular first...
តើជំងឺទូទៅណាមួយ ដែល/ឬ...
តើណាមួយនៃ cells...
Class II composite resin is lined by:?
សាច់ដុំដែលភ្ជាប់ទៅនឹងផ្ទៃសងខាង...
Stress from microtrauma results from:
Which of the following roots is the largest permanent maxillary first...
ការថត Lateral cephalometric radiograph...
វត្ថុរាវនៃអញ្ចាញធ្មេញ(Gingival...
Calcium hydroxide is used in deep cavity because it is:?
ភាពធម្មតានៃ Sulcular epithelium...
Any Condition that prevents thorough cleaning of any tooth surface or...
When we see from the buccal aspect in the permanent maxillary first...
ការវិវត្ដន៏...
បន្ទាប់ពីផ្ទៃមុខធ្មេញត្រូវបានសំអាតយ៉ាងស្អាតបាត...
Patient feel pain of short duration after class II restoration....
ការថយចុះកំរិតជាតិស្ករក្នុងឈាមគឺបង្ហាញឲ្យឃើញតាមសញ្ញាគ្លីនិក...
The use of long-term retainers to maintain post-orthodontic tooth...
Crown shape from occlusal aspect of permanent mandibular first molar...
ពេលយកពុម្ភធ្មេញពីមាត់...
តើណាមួយនៃ fibers...
Rampant caries in adult in anterior teeth restored by:?
ភាពធ្ងន់ធ្ងរនៃជំងឺជាលិកាជុំវិញឬសធ្មេញវាអាស្រ័យទៅលើ៖?...
The #1 factor associated with discomfort within masticatory system...
Crown shape from buccal aspect of permanent mandibular first molar is?
ក្មេងប្រុសអាយុ 12ឆ្នាំ...
ជំងឺជាលិកាជំវិញឬសធ្មេញរាំរ៉ៃ...
Cavity varnish should be applied at least in:?
ស្រ្តីវ័យចំណាស់ម្នាក់បានប្រើប្រាស់កំរិតជាតិភ្លុយអ័រសមល្មមក្នុងមួយជីវិតរបស់គាត់។...
One noticeable characteristic of Attrition that present on enamel...
Anatomical crown of tooth is?
Lee way space នៅក្មេង អាយុ 8ឆ្នាំ ៖
An acute lateral periodontal abscess...
The spontaneous production of an electric current resulting from two...
Propylthiouracil...
One noticeable characteristic of Erosion that present on enamel...
Clinical crown of tooth is ?
Osteomyelitis នៅឆ្អឹង mandible...
A furcation invasion...
One week after filling of class II restoration, the post treatment...
One noticeable characteristic of Abrasion which cause by tooth...
នៅពេលធ្វើ Cervical cross sectionនៅលើ...
អ្នកជំងឺម្នាក់ចង់ដកធ្មេញដែលនៅសល់ទាំងរបស់គាត់...
Benzodiazepines...
The function of the anterior teeth is:?
ការបង្កើនកំរិត radiographic density...
The union of the triangular ridge of the distobuccal cusp and the...
ក្នងចំនោមថ្នាំខាងក្រោម...
Alert!

Advertisement