4dd MCQs 325 Orthodontics I Prof. Mey Phoung 2019

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    Orthodontic treatment can improve:

    • All are related
    • The appearance
    • Mastication
    • Speed
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4dd MCQs 325 Orthodontics I Prof. Mey Phoung 2019 - Quiz

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  • 2. 

    The factors that causes of overjet increase ?

    • All are related

    • Skeletal factor

    • Dental factor

    • Soft tissues

    • Habits

    Correct Answer
    A. All are related
    Explanation
    The correct answer is that all of the factors mentioned (skeletal factor, dental factor, soft tissues, and habits) are related to the increase of overjet. Overjet refers to the horizontal distance between the upper and lower front teeth, and it can be influenced by various factors. Skeletal factors such as jaw size and position can affect the overjet, as well as dental factors like the position and alignment of the teeth. Soft tissues, such as the lips and cheeks, can also contribute to the overjet. Additionally, habits like thumb sucking or tongue thrusting can impact the development of overjet.

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  • 3. 

    How can creating space for teeth alignment ?

    • All are related

    • Extraction

    • Distal movement of molars

    • Enamel stripping

    • Expansion

    Correct Answer
    A. All are related
    Explanation
    All the options mentioned in the question are related to creating space for teeth alignment. Extraction involves removing a tooth to create space. Distal movement of molars refers to shifting the molars towards the back of the mouth to create space. Enamel stripping involves removing a small amount of enamel from the teeth to create space. Expansion involves widening the dental arch to create space. Therefore, all the options mentioned are related to creating space for teeth alignment.

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  • 4. 

    The early loss of deciduous teeth would cause ?

    • All are related

    • Loss of space will be faster

    • Loss of space will be more severe

    • Crowding in the buccal segment

    • All unrelated

    Correct Answer
    A. All are related
    Explanation
    The early loss of deciduous teeth can lead to multiple consequences, all of which are related. Firstly, it can cause the loss of space for permanent teeth, as the deciduous teeth act as placeholders for the permanent teeth. Without the deciduous teeth, the permanent teeth may not have enough space to erupt properly, leading to crowding and misalignment. Additionally, the loss of space can be more severe and the crowding can be more pronounced in the buccal segment of the mouth. Therefore, all the given options are interrelated and can occur as a result of early loss of deciduous teeth.

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  • 5. 

    Clinical examination of intra-oral in the labial segment was checked and found ?

    • All are related

    • Incisor relationship

    • Overbite, Overjet

    • Centre line

    • Any displacement on closure

    Correct Answer
    A. All are related
    Explanation
    The correct answer is that all of these factors are related when examining the intra-oral labial segment. The intra-oral labial segment refers to the area inside the mouth around the lips and front teeth. When examining this area, it is important to assess various aspects such as the incisor relationship, overbite, overjet, center line alignment, and any displacement on closure. These factors are all interconnected and can provide valuable information about the overall oral health and alignment of the patient.

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  • 6. 

    The amount of anchorage required depend on the factor below?

    • All are related

    • The number of teeth to be move

    • The distance of teeth need to be move

    • Force applied

    • Root surface areas (RSA) of the teeth used for anchorage

    Correct Answer
    A. All are related
    Explanation
    The correct answer is that all of the factors mentioned are related to the amount of anchorage required. The number of teeth to be moved, the distance they need to be moved, the force applied, and the root surface areas of the teeth used for anchorage are all interconnected and influence the amount of anchorage needed. Each factor affects the overall mechanics and forces involved in the orthodontic treatment, making them all significant in determining the amount of anchorage required.

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  • 7. 

    Upper and lower arches were checked in intra-oral examination ?

    • All are related

    • Inclination of incisors

    • Crowding teeth

    • Gingival recession

    • Cross bite, rotation, missing, impacted….

    Correct Answer
    A. All are related
    Explanation
    The answer "All are related" suggests that the upper and lower arches were checked in the intra-oral examination because all of the mentioned conditions (inclination of incisors, crowding teeth, gingival recession, cross bite, rotation, missing, impacted) can be related to the alignment and condition of the arches. By examining both the upper and lower arches, a dentist or orthodontist can assess the overall oral health and identify any potential issues or abnormalities.

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  • 8. 

    Other causes of median diastema could be due to:

    • All are related

    • Large fibrous

    • Missing or small lateral incisors

    • Generalised spacing

    Correct Answer
    A. All are related
    Explanation
    The given correct answer suggests that all the mentioned causes, including large fibrous, missing or small lateral incisors, and generalized spacing, are related to the occurrence of median diastema. This implies that these factors can contribute to the development of a gap between the two front teeth.

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  • 9. 

    The maxillary plane ( Mx ) was represented by a line drawn through from ?

    • ANS and PNS

    • ANS and Po

    • PNS and Or

    • PNS and Go

    • All unrelated

    Correct Answer
    A. ANS and PNS
    Explanation
    The maxillary plane is represented by a line drawn through the ANS (anterior nasal spine) and the PNS (posterior nasal spine). These two points are anatomical landmarks that help define the position and orientation of the maxilla, which is the upper jawbone. By drawing a line through the ANS and PNS, we can visualize the orientation of the maxillary plane in relation to other structures in the skull. The other options, such as ANS and Po, PNS and Or, and PNS and Go, are unrelated to the representation of the maxillary plane.

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  • 10. 

    Before planning extractions of any permanent teeth, it’s important to ensure that ?

    • All are related

    • All remaining teeth are present

    • Developing are appropriately

    • May need radiograph

    • All unrelated

    Correct Answer
    A. All are related
    Explanation
    Before planning extractions of any permanent teeth, it’s important to ensure that all related factors are considered. This includes checking if all remaining teeth are present, if the developing teeth are appropriately positioned, and if a radiograph may be needed to assess the situation. It is crucial to evaluate all these factors to make an informed decision about extractions.

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  • 11. 

    Hawley retainer regime was placed after orthodontic treatment ?

    • All are related

    • Wait for bone reorganize

    • Keep for stability

    • To prevent the relapse

    • All unrelated

    Correct Answer
    A. All are related
    Explanation
    The correct answer is that all the options given are related. This means that the Hawley retainer regime was placed after orthodontic treatment to wait for the bone to reorganize, keep the teeth stable, and prevent relapse. The options "All unrelated" is incorrect as it contradicts the statement that all the options are related.

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  • 12. 

    What treatment options when permanent lateral incisors are missing ?

    • All are related

    • Create space for implants

    • Preserve space with bridges

    • Preserve space with partial denture

    • Closing space and shape 3 to look like 2

    Correct Answer
    A. All are related
    Explanation
    All of the treatment options mentioned are related to the issue of missing permanent lateral incisors. Creating space for implants involves placing dental implants in the empty spaces to replace the missing teeth. Preserving space with bridges involves using dental bridges to fill the gaps and prevent the adjacent teeth from shifting. Preserving space with partial dentures involves using removable dentures to replace the missing teeth and maintain the space. Closing the space and shaping tooth 3 to look like tooth 2 refers to orthodontic treatment where the adjacent teeth are moved closer together to close the gap caused by the missing incisors.

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  • 13. 

    The factors determining of the anchorage value ?

    • All are related

    • Force magnitude

    • Pressure distribution in the periodontal ligament

    • Root morphology

    • Space available

    Correct Answer
    A. All are related
    Explanation
    The anchorage value is determined by various factors, and all of the factors mentioned in the options are related to each other. The force magnitude plays a role in determining the anchorage value as a higher force can lead to greater movement of the tooth. The pressure distribution in the periodontal ligament is also important as it affects the stability of the tooth. Root morphology, referring to the shape and size of the tooth's root, can impact the anchorage value as well. Lastly, the space available in the mouth can influence the anchorage value, as overcrowding or lack of space can affect the stability of the tooth.

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  • 14. 

    The skeletal discrepancy of Class III malocclusion when ?

    • All are related

    • The maxilla retrosive and mandibular protrusive

    • The maxilla normal and mandibular protrusive

    • The maxilla retrosive and mandibular normal

    • Unrelated

    Correct Answer
    A. All are related
    Explanation
    The correct answer is "All are related". This means that in Class III malocclusion, all factors mentioned in the options (maxilla retrognathic and mandibular protrusive, maxilla normal and mandibular protrusive, maxilla retrognathic and mandibular normal) are related to the skeletal discrepancy. In Class III malocclusion, there is a discrepancy between the upper and lower jaws, leading to a protruded lower jaw or a retruded upper jaw or both. Therefore, all the mentioned combinations contribute to the skeletal discrepancy seen in Class III malocclusion.

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  • 15. 

    Anterior teeth are most likely to be fractured in children with which of the following mixed dentition malocclusions?

    • Class II div 1

    • Class I

    • Class II div 2

    • Class III

    • There is no relation

    Correct Answer
    A. Class II div 1
    Explanation
    Children with Class II div 1 malocclusion have a prominent upper front teeth and a retruded lower jaw. This can result in an increased overjet, which is the horizontal distance between the upper and lower front teeth. The increased overjet can make the anterior teeth more susceptible to trauma and fracture, as they are more exposed and vulnerable. Therefore, children with Class II div 1 malocclusion are most likely to experience fractures in their anterior teeth.

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  • 16. 

    Normal overjet is:

    • 2mm

    • 3mm

    • 4mm

    • 5mm

    Correct Answer
    A. 2mm
    Explanation
    Normal overjet refers to the horizontal distance between the upper and lower front teeth when the jaws are closed in a normal bite. A normal overjet of 2mm indicates that the upper front teeth slightly protrude over the lower front teeth by a small amount, which is considered within the normal range. This alignment allows for proper function during biting and chewing and contributes to a balanced and harmonious smile.

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  • 17. 

    Normal overbite is:

    • 2mm

    • 3mm

    • 4mm

    • 5mm

    Correct Answer
    A. 2mm
    Explanation
    Normal overbite refers to the vertical overlap of the upper front teeth over the lower front teeth when the jaws are closed. A 2mm overbite is considered normal as it allows for proper functioning of the teeth and jaws during biting and chewing. It ensures that the teeth come together in a stable and balanced manner, preventing excessive wear and tear. An overbite greater than 2mm may indicate a malocclusion or misalignment of the teeth and jaws, which may require orthodontic treatment to correct.

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  • 18. 

    Anomalies in position of teeth is:

    • All are related

    • Ectopic

    • Transposition

    • Impaction

    Correct Answer
    A. All are related
    Explanation
    The correct answer is "All are related". This means that anomalies in the position of teeth, such as ectopic, transposition, and impaction, are all interconnected and have a relationship with each other. These anomalies may occur simultaneously or be influenced by one another, leading to abnormalities in the positioning of teeth within the mouth. Therefore, it can be inferred that these terms are all related to each other in the context of dental anomalies.

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  • 19. 

    Flush terminal plane :

    • Is the distal surface of upper E and lower E usually end in line with each other

    • Is the line of the mid of the face

    • Is the line of occlusal plane

    • Is the line from Mesio-buccal cusp of first molar to canine tip

    Correct Answer
    A. Is the distal surface of upper E and lower E usually end in line with each other
    Explanation
    The flush terminal plane refers to the distal surface of the upper primary second molar and the distal surface of the lower primary second molar ending in line with each other. This means that the two teeth are in alignment, creating a smooth surface without any overlap or gaps between them.

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  • 20. 

    The components for removable appliances ?

    • All are related

    • Active components

    • Retentive components

    • Anchorage

    • Baseplate

    Correct Answer
    A. All are related
    Explanation
    The components for removable appliances, including active components, retentive components, anchorage, and baseplate, are all related to each other. Each component serves a specific purpose in the function and effectiveness of the removable appliance. Active components are used to apply forces to the teeth or jaws, retentive components help to hold the appliance in place, anchorage provides stability and support, and the baseplate serves as the foundation for the appliance. Together, these components work in harmony to achieve the desired outcome of the removable appliance.

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  • 21. 

    Class II Skeletal base mean ?

    • All are related

    • When the maxilla protrusive and mandible normal

    • When the maxilla protrusive and the mandible retrusive

    • When the mandible retrusive and the maxilla normal

    • All unrelated

    Correct Answer
    A. All are related
    Explanation
    The correct answer is that all the given options are related. This means that the skeletal base class II can occur when the maxilla is protrusive and the mandible is normal, when both the maxilla and the mandible are retrusive, or when the mandible is retrusive and the maxilla is normal. This suggests that there is a relationship between the position of the maxilla and the mandible in class II skeletal base.

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  • 22. 

    Anomalies in form of teeth during eruption ?

    • All are related

    • Peg lateral incisors

    • Dilacerations

    • Twin teeth ( germination,fusion )

    • Barrel shapes

    Correct Answer
    A. All are related
    Explanation
    All of the mentioned anomalies in teeth during eruption are related to each other. Peg lateral incisors refer to smaller, cone-shaped incisors that may occur due to genetic factors or dental trauma. Dilacerations are abnormalities in tooth development that cause the tooth to have an abnormal shape or angle. Twin teeth, such as germination and fusion, occur when two teeth develop from a single tooth bud. Barrel shapes refer to teeth that have a cylindrical or barrel-like appearance. These anomalies are all different manifestations of irregularities in tooth eruption and development.

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  • 23. 

    Check the soft tissue in clinical examination in extra-oral of the lip was found ?

    • All are related

    • Competent or incompetent lip

    • Lip line

    • Lip posture

    • Habitual position of lip

    Correct Answer
    A. All are related
    Explanation
    All the options mentioned in the question are related to the examination of soft tissue in the extra-oral area of the lip. The competence or incompetence of the lip, lip line, lip posture, and habitual position of the lip are all factors that can be assessed during a clinical examination. These factors can provide valuable information about the condition and function of the lip, which can be important for diagnosis and treatment planning.

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  • 24. 

    How to minimize anchorage loss for the tooth movement ?

    • All are related

    • Use force as light as possible

    • Move minimum number of teeth at one time

    • Increase the resistance of anchor teeth

    • All unrelated

    Correct Answer
    A. All are related
    Explanation
    All of the options provided are related to minimizing anchorage loss for tooth movement. Using a force as light as possible helps to reduce the strain on the anchor teeth and minimize the risk of anchorage loss. Moving a minimum number of teeth at one time also helps to distribute the force more evenly and reduce the strain on the anchor teeth. Increasing the resistance of the anchor teeth can also help to minimize anchorage loss by providing more stability and support during tooth movement. Therefore, all of these factors are interconnected and play a role in minimizing anchorage loss.

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  • 25. 

    The malocclusion cause by thumb sucking

    • All are related

    • Procline of upper incisors

    • Retrocline of lower incisors

    • Anterior open bite

    • Constricted the maxilla

    Correct Answer
    A. All are related
    Explanation
    All the mentioned conditions, including procline of upper incisors, retrocline of lower incisors, anterior open bite, and constricted maxilla, are related to malocclusion caused by thumb sucking. Thumb sucking can lead to improper alignment of the teeth and jaw, resulting in these various dental issues.

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  • 26. 

    Appliance for treatment is:

    • All are related

    • Removable appliance

    • Functional appliance

    • Fixed appliance

    Correct Answer
    A. All are related
    Explanation
    The correct answer is "All are related." This means that all the options mentioned (removable appliance, functional appliance, and fixed appliance) are related to the topic of treatment appliances. It implies that these appliances have some connection or relevance to the treatment being discussed.

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  • 27. 

    The deepest point on the maxillary profile between anterior nasal spine and the alveolar crest is ?

    • A Point

    • B Point

    • Ba Point

    • S Point

    • All unrelated

    Correct Answer
    A. A Point
    Explanation
    The correct answer is A Point. The maxillary profile refers to the outline or contour of the upper jaw. The deepest point on this profile, between the anterior nasal spine (a bony projection at the front of the maxilla) and the alveolar crest (the highest point of the gum ridge), is known as the A Point. This is an anatomical reference point used in orthodontics and maxillofacial surgery to assess and plan treatments for facial asymmetry and malocclusion.

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  • 28. 

    Robert retractor was used in removable appliance to ?

    • Retract the labial segment teeth

    • Protract the labial segment teeth

    • Reduce the overbite

    • Intrude the incisors

    • All unrelated

    Correct Answer
    A. Retract the labial segment teeth
    Explanation
    The Robert retractor is a type of removable appliance that is used to retract the labial segment teeth. This means that it is designed to move the front teeth backwards, towards the back of the mouth. This can be beneficial in cases where the front teeth are protruding or sticking out too far. By retracting the labial segment teeth, the appliance helps to create a more balanced and aesthetically pleasing smile.

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  • 29. 

    Overjet normal when measure is ?

    • 2 mm

    • 3 mm

    • 4 mm

    • 5 mm

    • All unrelated

    Correct Answer
    A. 2 mm
    Explanation
    Overjet refers to the horizontal distance between the upper and lower front teeth. A normal overjet measurement is typically around 2 mm. This means that the upper front teeth slightly overlap the lower front teeth by 2 mm. Measurements of 3 mm, 4 mm, or 5 mm would indicate an increased overjet, which may suggest malocclusion or misalignment of the teeth. The option "All unrelated" is not a valid answer as it does not provide any relevant information regarding the normal measurement of overjet.

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  • 30. 

    Usually reduced face height is associated with ?

    • Deep bite

    • Normal bite

    • Open bite

    • Cross bite

    • All unrelated

    Correct Answer
    A. Deep bite
    Explanation
    Reduced face height is typically associated with a deep bite. In a deep bite, the upper front teeth excessively overlap the lower front teeth when biting down. This can cause the lower face to appear shorter or reduced in height. The deep bite is characterized by a vertical overlap of the front teeth, which can lead to various dental and skeletal issues. Therefore, it is logical to associate reduced face height with a deep bite.

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  • 31. 

    What cephalometric planes tracing were found ?

    • All are related

    • Frankfort plane

    • Maxillary plane

    • Functional occlusal plane

    • Mandibular plane

    Correct Answer
    A. All are related
    Explanation
    The cephalometric planes tracing that were found are all related. This means that the Frankfort plane, Maxillary plane, Functional occlusal plane, and Mandibular plane are interconnected or have some sort of relationship with each other. The question does not provide any further information about the specific nature of their relationship or how they are related.

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  • 32. 

    The patient who has to need for fixed retainers after post- treatment of orthodontic when?

    • All are related

    • Teeth are spacing

    • Teeth are Periodontology

    • Teeth are rotation

    • Unrelated

    Correct Answer
    A. All are related
    Explanation
    The correct answer is that all of the conditions mentioned (teeth spacing, teeth periodontology, teeth rotation) are related to the need for fixed retainers after orthodontic treatment. This means that if a patient has any of these conditions, they may require fixed retainers to maintain the alignment of their teeth after orthodontic treatment.

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  • 33. 

    When should the patient take off the functional appliance ?

    • All are related

    • Tooth brushing

    • Contact sports

    • Eating is difficult for the first few weeks

    • All unrelated

    Correct Answer
    A. All are related
    Explanation
    The correct answer is "All are related." This means that all of the mentioned activities (tooth brushing, contact sports, and eating difficulties for the first few weeks) are related to when the patient should take off the functional appliance. This implies that these activities may interfere with the use or effectiveness of the functional appliance, and therefore, it is recommended to remove it during these activities.

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  • 34. 

    What diagnosis will be found when the lateral cephalometric tracing was finished ?

    • All are related

    • Skeletal pattern

    • Dental base length

    • Soft tissue

    • Dental factors

    Correct Answer
    A. All are related
    Explanation
    The correct answer is "All are related." This suggests that the diagnosis found when the lateral cephalometric tracing was finished will involve all of the mentioned factors: skeletal pattern, dental base length, soft tissue, and dental factors. It implies that these factors are interconnected and contribute to the overall diagnosis.

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  • 35. 

    The most posterior, inferior point on the angle of the mandible ?

    • Go Point

    • B Point

    • Po Point

    • Ba Point

    • All unrelated

    Correct Answer
    A. Go Point
    Explanation
    The most posterior, inferior point on the angle of the mandible is known as the Go Point. This point is located at the junction of the posterior border of the ramus and the inferior border of the mandible. It is an anatomical landmark that is commonly used in dental and orthodontic treatments for reference and measurements.

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  • 36. 

    The most inferior point on the marginal of the orbit ?

    • Or Point

    • A Point

    • B Point

    • Po Point

    • All unrelated

    Correct Answer
    A. Or Point
    Explanation
    The most inferior point on the margin of the orbit is referred to as the "Or Point." This point is located at the lowest position on the orbital margin, indicating its inferiority compared to the other points mentioned. The other options, such as A Point, B Point, and Po Point, are unrelated and do not represent the most inferior point on the orbital margin.

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  • 37. 

    The a mount of crowding is classified as ?

    • All are related

    • Mild crowding

    • Moderate crowding

    • Severe crowding

    • All unrelated

    Correct Answer
    A. All are related
    Explanation
    The correct answer is "All are related." This means that the amount of crowding can be classified as either mild, moderate, or severe. These classifications are all related to the level of crowding present.

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  • 38. 

    Change in proportion of the head and face during growth ?

    • All are related

    • Growth of the cranial vault

    • Growth of the cranial base

    • Growth of the maxilla

    • Growth of the mandible

    Correct Answer
    A. All are related
    Explanation
    The growth of the head and face involves the growth of various structures, including the cranial vault (the top part of the skull), the cranial base (the bottom part of the skull), the maxilla (upper jaw), and the mandible (lower jaw). These structures are all interconnected and influence each other's growth. Therefore, all of these factors are related to the change in proportion of the head and face during growth.

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  • 39. 

    Which one the following types of anchorage for orthodontic treatment ?

    • All are related

    • Intra-maxillary

    • Inter-maxillary

    • Extra-oral anchorage

    • All unrelated

    Correct Answer
    A. All are related
    Explanation
    The correct answer is "All are related." This means that all of the options mentioned (intra-maxillary, inter-maxillary, and extra-oral anchorage) are types of anchorage used in orthodontic treatment.

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  • 40. 

    The conjunction of the fronto-nasal suture ?

    • Nasion2

    • Frontal

    • Sella

    • Nasal

    • Basion

    Correct Answer
    A. Nasion2
    Explanation
    The correct answer is Nasion2. The fronto-nasal suture is a fibrous joint that connects the frontal bone to the nasal bones. The term "Nasion2" is likely a typographical error, as "nasion" refers to the point where the frontal bone and the nasal bones meet. Therefore, the correct answer is Nasion, not Nasion2.

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  • 41. 

    What’s function of labial bow ( Active ) when apply the force to anterior teeth ?

    • To retract anterior teeth

    • To procline anterior teeth

    • To intrude the anterior teeth

    • To keep in position of anterior teeth

    • Unrelated

    Correct Answer
    A. To retract anterior teeth
    Explanation
    The function of a labial bow (active) when applying force to anterior teeth is to retract them. This means that the labial bow helps to move the anterior teeth backward, towards the back of the mouth. This can be useful in cases where the anterior teeth are protruding or sticking out too far forward. By retracting the anterior teeth, the labial bow helps to align them properly and create a more harmonious bite.

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  • 42. 

    Which one is the right answer for the canine classification ?

    • All are related

    • Canine class I

    • Canine class II

    • Canine class III

    • Canine ½ unit class II

    Correct Answer
    A. All are related
    Explanation
    The correct answer is "All are related." This suggests that all the options provided in the question are connected or have some relationship to each other. It implies that the different classifications mentioned (Canine class I, Canine class II, Canine class III, Canine ½ unit class II) are interconnected in some way, possibly representing different subcategories or variations within the broader canine classification.

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  • 43. 

    Mesiodens :

    • Found in the midline

    • Found in canine location

    • Found in buccal segment

    • Found next to wisdom tooth

    Correct Answer
    A. Found in the midline
    Explanation
    Mesiodens refers to a supernumerary tooth that is found in the midline of the dental arch. It is an extra tooth that develops between the two central incisors. This condition is relatively common and can cause various dental issues such as crowding, misalignment, and impacted permanent teeth. The presence of a mesiodens is usually detected during dental examinations or through X-rays. Treatment may involve extraction of the supernumerary tooth to prevent any complications and ensure proper dental alignment.

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  • 44. 

    The type of movement usually produced by a removable appliance is ?

    • Tipping

    • Torque

    • Rotation

    • Bodily movement

    • Un related

    Correct Answer
    A. Tipping
    Explanation
    A removable appliance usually produces a type of movement called tipping. Tipping refers to the movement of a tooth around its center of resistance, causing it to tilt or lean in a certain direction. This type of movement is commonly seen with removable appliances as they apply forces that are more likely to cause tipping rather than other types of movement such as torque, rotation, or bodily movement.

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  • 45. 

    The convexity of the face with profile view when the ?

    • Skeletal is class II base

    • Skeletal is class III base

    • Skeletal is class I base

    • Skeletal discrepancy

    • Unrelated

    Correct Answer
    A. Skeletal is class II base
    Explanation
    The correct answer is "Skeletal is class II base". This means that when the skeletal base of the face is classified as class II, it can result in convexity of the face when viewed in profile. Class II skeletal base refers to a condition where the upper jaw (maxilla) is positioned further back in relation to the lower jaw (mandible), causing the face to appear more convex or protruded.

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  • 46. 

    Overbite normal when measure is ?

    • 2 mm

    • 3 mm

    • 4 mm

    • 5 mm

    • All are related

    Correct Answer
    A. 2 mm
    Explanation
    An overbite is considered normal when it measures 2 mm. This means that there is a slight overlap of the upper front teeth over the lower front teeth, which is within the normal range. An overbite that measures 2 mm is generally considered to be a healthy and functional bite.

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  • 47. 

    When the child was 6 to 8 years old what can you see the permanent teeth had erupted ?

    • All are related

    • Upper incisors

    • Lower incisors

    • Upper first molars

    • Lower first miolars

    Correct Answer
    A. All are related
    Explanation
    Permanent teeth typically begin to erupt between the ages of 6 and 8. At this stage, all of the mentioned teeth - upper incisors, lower incisors, upper first molars, and lower first molars - would have erupted or started to erupt. Therefore, all of these teeth are related to the eruption of permanent teeth during this age range.

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  • 48. 

    What we can see the overbite after intra-oral examination ?

    • All are related

    • Reduced or deep bite

    • Anterior open bite

    • Complete or incomplete

    • Trauma or non trauma

    Correct Answer
    A. All are related
    Explanation
    The correct answer is that all of these options are related to the overbite seen during an intra-oral examination. This means that when conducting an intra-oral examination, any of these conditions could potentially be observed in relation to the overbite.

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  • 49. 

    The most common cause of the teeth missing ?

    • Lateral incisors

    • Central incisors

    • First premolars

    • First permanent molars

    • Second permanent molars

    Correct Answer
    A. Lateral incisors
    Explanation
    The most common cause of missing teeth is usually the lateral incisors. This is because the lateral incisors are the second teeth from the center of the mouth and are more prone to various dental issues such as decay, trauma, or congenital absence. These teeth play an important role in the overall appearance and functionality of the mouth, so their absence can have a significant impact on a person's smile and ability to chew properly.

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Quiz Review Timeline (Updated): Apr 15, 2024 +

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  • Current Version
  • Apr 15, 2024
    Quiz Edited by
    ProProfs Editorial Team
  • Mar 20, 2019
    Quiz Created by
    Catherine Halcomb

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