Dentistry/Dental AST. Simulation Examination 8

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1/102 Questions

The _____ are sometimes referred to as “wisdom” teeth.
- First molars
- Premolars
- Third molars
- Canines

About This Quiz

This is a Simulated Examination for Gulf Dentistry/Dental Ast Examinations taken from Last Month's HAAD Feedbacks.
This examination contains 100 of the most UPDATED EXAMS from Abu Dhabi, KSA, and UAE.
Take this examination for 120 minutes. You need to get 86% to pass the HAAD. 60% to pass MOH, DHA, or Prometrics.

Dentistry/Dental AST. Simulation Examination 8 - Quiz

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2.

There are no ______ in the primary dentition.
- Molars
- Canines
- Premolars
- Incisors
Correct Answer

A. Premolars

Explanation

In the primary dentition, which refers to the set of teeth that children have before their permanent teeth come in, there are no premolars. Premolars are the teeth that come after the canines and before the molars. However, in the primary dentition, the teeth consist of incisors, canines, and molars.

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3.

There are _____ molars in the permanent dentition.
- 8
- 14
- 16
- 12
Correct Answer

A. 12

Explanation

The permanent dentition refers to the set of teeth that replace the primary or baby teeth. In the permanent dentition, there are a total of 12 molars. Molars are the larger, flatter teeth located at the back of the mouth, used for grinding and chewing food.

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4.

The primary dentition has _____ molars and _____ premolars.
- 12; 8
- 8; 0
- 8; 4
- 4; 4
Correct Answer

A. 8; 0

Explanation

The primary dentition refers to the set of teeth that a child has before their permanent teeth erupt. In the primary dentition, there are a total of 20 teeth. These include 8 molars and 0 premolars. Molars are the larger, flatter teeth towards the back of the mouth, while premolars are the smaller teeth that come after the canines. Therefore, the correct answer is 8 molars and 0 premolars.

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5.

Most maxillary first premolars are considered to be ______ because they have a root that is divided into two roots.
- Bifurcated
- Succedaneous
- Trifurcated
- Bicanineate
Correct Answer

A. Bifurcated

Explanation

Most maxillary first premolars are considered to be bifurcated because they have a root that is divided into two roots. This means that the root of the tooth splits into two separate branches, which is a common characteristic of maxillary first premolars.

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6.

Using the Universal/National Teeth-Numbering System, what are the numbers for the permanent third molars?
- 1, 2, 3, 4
- 3, 14, 19, 30
- 1, 16, 17, 32
- 2, 15, 18, 31
Correct Answer

A. 1, 16, 17, 32

Explanation

The correct answer is 1, 16, 17, 32. The Universal/National Teeth-Numbering System assigns specific numbers to each tooth in the mouth. In this system, the permanent third molars are numbered as 1, 16, 17, and 32.

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7.

On the mandibular second premolar, the main groove pattern on the three cusp type takes the form of a...
- U
- Y
- C
- H
Correct Answer

A. Y

Explanation

The correct answer is "Y". On the mandibular second premolar, the main groove pattern on the three cusp type takes the form of a "Y". This is a common characteristic of the tooth, where the grooves create a Y shape on the occlusal surface. This helps in identifying and distinguishing the mandibular second premolar from other teeth.

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8.

Oral Cancer cases are more commonly found in African Americans.
- True
- False
Correct Answer

A. True

Explanation

Oral cancer cases are more commonly found in African Americans due to various factors such as higher tobacco and alcohol use, genetic predisposition, and limited access to healthcare. Studies have shown that African Americans have a higher incidence and mortality rate of oral cancer compared to other racial and ethnic groups. This health disparity highlights the importance of targeted prevention and early detection efforts in this population to reduce the burden of oral cancer.

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9.

A malignant tumor of boneforming tissue is called
- Chondrosarcoma
- Angiosarcoma
- Osteosarcoma
- Hemangiosarcoma
Correct Answer

A. Osteosarcoma

Explanation

Osteosarcoma is the correct answer because it refers to a malignant tumor that arises from bone-forming tissue. It is the most common type of bone cancer and typically affects children and young adults. Osteosarcoma can occur in any bone but is most commonly found in the long bones of the arms and legs. It is characterized by the abnormal growth of osteoblasts, the cells responsible for forming new bone tissue. Osteosarcoma can be aggressive and may spread to other parts of the body if not treated early.

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10.

There are ___ teeth in a quadrant of the primary dentition.
- 5
- 10
- 20
- 8
Correct Answer

A. 5

Explanation

In the primary dentition, there are usually 20 teeth in total, with 10 teeth in each arch. A quadrant refers to one-fourth of the mouth, so in a quadrant of the primary dentition, there would be half of the total number of teeth in that arch. Therefore, in a quadrant of the primary dentition, there would be 5 teeth.

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11.

The smallest teeth in the permanent dentition are the:
- Maxillary lateral incisors.
- Mandibular central incisors.
- Mandibular canines.
- Maxillary central incisors.
Correct Answer

A. Mandibular central incisors.

Explanation

The mandibular central incisors are the smallest teeth in the permanent dentition. This is because they are located in the front of the mouth and are generally smaller in size compared to other teeth. The maxillary lateral incisors and maxillary central incisors are larger in size, while the mandibular canines are also larger and have a more pointed shape. Therefore, the mandibular central incisors are the correct answer as they are the smallest teeth in the permanent dentition.

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12.

The size, shape, color, and position of the _____ directly relate to how a person looks.
- Posterior teeth
- Molars
- Anterior teeth
- Premolars
Correct Answer

A. Anterior teeth

Explanation

The size, shape, color, and position of the anterior teeth directly relate to how a person looks. The anterior teeth, which include the incisors and canines, are the front teeth that are visible when a person smiles or speaks. These teeth play a crucial role in the aesthetics of a person's smile and overall facial appearance. The size, shape, color, and position of these teeth can greatly impact the symmetry, balance, and attractiveness of a person's face.

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13.

The primary teeth are classified in the Universal/National System using:
- Numbers 1 through 20.
- A number for each quadrant and a number for each tooth.
- Letters A through T.
- Numbers inside a bracket.
Correct Answer

A. Letters A through T.

Explanation

The primary teeth are classified in the Universal/National System using letters A through T. This system assigns a letter to each tooth in the mouth, with A being the upper right second molar and T being the lower left second molar. This classification system is widely used in dentistry to easily identify and communicate about specific primary teeth.

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14.

Identify the tooth number.
- #6
- #11
- #22
- #27
Correct Answer

A. #22

Explanation

The answer is #22 because tooth numbering follows a universal system called the FDI World Dental Federation notation. In this system, the upper right molars are numbered from 1 to 8, and the upper left molars are numbered from 9 to 16. Therefore, #22 corresponds to the upper left second molar.

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15.

There are how many premolars in the permanent dentition?
- 2
- 4
- 6
- 8
Correct Answer

A. 8

Explanation

In the permanent dentition, there are a total of 8 premolars. Premolars are the teeth located between the canines and molars in each quadrant of the mouth. They are used for chewing and grinding food.

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16.

The _____ are the longest teeth in the permanent dentition and are known as the cornerstone of the dental arches.
- Canines
- Central incisors
- Lateral incisors
- Molars
Correct Answer

A. Canines

Explanation

The canines are the longest teeth in the permanent dentition and are known as the cornerstone of the dental arches. They have a pointed shape and are located on either side of the incisors. Canines play an important role in biting and tearing food, as well as providing support and stability to the dental arches.

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17.

Centric occlusion is the maximum contact between the occluding surfaces of the maxillary and mandibular teeth.
- True
- Falsa
Correct Answer

A. True

Explanation

Centric occlusion refers to the position where the upper and lower teeth make maximum contact. It is the habitual biting position that allows for proper functioning of the teeth and jaw. In this position, the occluding surfaces of the upper and lower teeth are in their most stable and aligned position. Therefore, the statement that centric occlusion is the maximum contact between the occluding surfaces of the maxillary and mandibular teeth is true.

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18.

At what age do the deciduous teeth start being replaced by permanent teeth?
- 6 years old
- 7 years old
- 8 years old
- 9 years old
Correct Answer

A. 6 years old

Explanation

Deciduous teeth, also known as baby teeth, start being replaced by permanent teeth at around 6 years old. This process is called exfoliation, where the roots of the baby teeth dissolve and the permanent teeth push through the gums to take their place. By the age of 6, most children have lost their first baby tooth and the permanent teeth begin to emerge. Therefore, 6 years old is the correct age when the deciduous teeth start being replaced by permanent teeth.

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19.

Identify the tooth number.
- #3
- #13
- #19
- #27
Correct Answer

A. #19

Explanation

The correct answer is #19 because tooth numbers are typically assigned to each tooth in the mouth for identification purposes. In this case, #19 refers to a specific tooth in the mouth.

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20.

Malignant melanoma of the oral cavity is rare however the most common introoral location is the
- Palate and maxillary gingiva
- Tongue
- Buccal mucosa
- Retromolar area
Correct Answer

A. Palate and maxillary gingiva

Explanation

Malignant melanoma of the oral cavity is a rare condition, but when it does occur, the most common locations within the oral cavity are the palate and maxillary gingiva. This means that if a person develops malignant melanoma in their oral cavity, it is more likely to be found in these areas compared to other parts such as the tongue, buccal mucosa, or retromolar area.

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21.

How many canines are in a quadrant of the permanent dentition?
- 1
- 2
- 4
- 8
Correct Answer

A. 1

Explanation

In the permanent dentition, there is only one canine tooth in each quadrant. Canine teeth are the pointed teeth located on either side of the incisors, and they are used for tearing and grasping food. Therefore, the correct answer is 1.

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22.

The deciduous first maxillary molar has a transverse and oblique rige.
- True
- False
Correct Answer

A. True

Explanation

The deciduous first maxillary molar has a transverse and oblique ridge. This statement is true. The transverse ridge is formed when the buccal and lingual cusps of the tooth join together, creating a ridge that runs horizontally across the occlusal surface. The oblique ridge, on the other hand, runs diagonally from the mesiobuccal cusp to the distolingual cusp. These ridges are important for proper occlusion and chewing function of the deciduous first maxillary molar.

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23.

A mandibular canine tooth:
- Usually erupts before the maxillary canine.
- Has a larger and more developed cusp than the maxillary canine.
- Has a sharper cusp tip than a maxillary canine.
- Has a sharper cusp tip than a maxillary canine.
Correct Answer

A. Usually erupts before the maxillary canine.

Explanation

Mandibular canine tooth usually erupts before the maxillary canine because the mandibular arch develops and erupts earlier than the maxillary arch. This is a common pattern in tooth eruption, where the lower teeth tend to erupt before the upper teeth. The timing of eruption is influenced by various factors such as genetic factors, jaw size, and tooth development.

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24.

Which of the following premolars exhibits 3 pits?
- Mandibular first premolar
- Mandibular second premolar (Y type)
- Mandibular second premolar (U type)
- Maxillary first premolar
Correct Answer

A. Mandibular second premolar (Y type)

Explanation

The mandibular second premolar (Y type) exhibits 3 pits. Pits are small depressions or hollows on the occlusal surface of the tooth. The Y type mandibular second premolar has a Y-shaped groove on its occlusal surface, which divides it into three distinct cusps or elevations. Each of these cusps has a pit associated with it, resulting in a total of three pits on the occlusal surface of the tooth. This distinguishes it from the other options, which do not have the same Y-shaped groove and therefore do not exhibit three pits.

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25.

Identify the tooth number.
- #17
- #18
- #31
- #32
Correct Answer

A. #31
26.

Premolars and molars are used for _____ food.
- Tearing
- Cutting
- Grinding
- All of the above
Correct Answer

A. Grinding

Explanation

Premolars and molars are used for grinding food. These teeth have flat surfaces with ridges called cusps, which help in breaking down food into smaller particles. Unlike incisors and canines, premolars and molars are not designed for tearing or cutting food. Therefore, the correct answer is grinding.

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27.

The _____ premolar has two bifurcated roots.
- Mandibular first
- Maxillary first
- Maxillary second
- Mandibular second
Correct Answer

A. Maxillary first

Explanation

The maxillary first premolar is the correct answer because it is the only premolar in the given options that has two bifurcated roots. Bifurcated means divided into two branches or forks, and the maxillary first premolar typically has a mesial and a distal root. The mandibular premolars, on the other hand, usually have one root.

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28.

The cusp of Carabelli is found on the:
- Premolars.
- Central incisors.
- Maxillary first molars.
- Maxillary second molars.
Correct Answer

A. Maxillary first molars.

Explanation

The cusp of Carabelli is a small additional cusp found on the mesiolingual aspect of the maxillary first molars. It is not present on premolars, central incisors, or maxillary second molars.

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29.

Identify the tooth number.
- #1
- #16
- #17
- #32
Correct Answer

A. #17
30.

Identify the tooth number.
- #3
- #14
- #19
- #30
Correct Answer

A. #30
31.

A _____ is a pinpoint depression in the occlusal surface of a posterior tooth where two or more grooves meet.
- Fossa
- Pit
- Fissure
- Developmental groove
Correct Answer

A. Pit

Explanation

A pit is a pinpoint depression in the occlusal surface of a posterior tooth where two or more grooves meet. It is a small, shallow area that can collect food debris and bacteria, making it susceptible to decay. Pits are often found in molars and premolars and can be difficult to clean properly with regular brushing and flossing. Therefore, pits are prone to developing cavities and may require dental treatment to prevent further damage to the tooth.

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32.

A benign tumor of adipose tissue is called a
- Lipoma
- Schwannoma
- Hemangioma
- Lymphangioma
Correct Answer

A. Lipoma

Explanation

A benign tumor of adipose tissue is called a lipoma. Lipomas are non-cancerous growths that develop in the fat cells beneath the skin. They are usually soft to the touch, movable, and painless. Lipomas can occur anywhere on the body where there is fat tissue, but they are commonly found on the neck, shoulders, back, and arms. They are typically harmless and do not require treatment unless they cause discomfort or affect the appearance.

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33.

The most common malignant soft tissue tumor of the head and neck in children is
- Squamous cell carcinoma
- Malignant odontogenic tumor
- Rhabdomyosarcoma
- Osteosarcoma
Correct Answer

A. Rhabdomyosarcoma

Explanation

Rhabdomyosarcoma is the most common malignant soft tissue tumor of the head and neck in children. It is a type of cancer that arises from skeletal muscle cells. This tumor often presents as a rapidly growing mass and can occur in various locations such as the orbit, nasopharynx, or paranasal sinuses. It is more commonly seen in children than in adults and requires prompt diagnosis and treatment for better outcomes.

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34.

The root of the maxillary lateral incisor:
- Is the same width as the root of the maxillary central incisor.
- Is a bifurcated root.
- May curve slightly to the distal.
- Is the same size as the root of the mandibular lateral incisor.
Correct Answer

A. May curve slightly to the distal.

Explanation

The correct answer is that the root of the maxillary lateral incisor may curve slightly to the distal. This means that the root of this tooth, which is located in the upper jaw, may have a slight curvature towards the back of the mouth. This is a common anatomical variation and is important to consider when performing dental procedures or treatments involving this tooth.

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35.

An unusually large space between adjacent teeth is known as a:
- Fossa.
- Mamelon.
- Cusp.
- Diastema.
Correct Answer

A. Diastema.

Explanation

A diastema refers to an unusually large space between adjacent teeth. It is a condition that can occur due to various reasons such as tooth loss, undersized teeth, or an oversized labial frenum. This gap can be seen most commonly between the two upper front teeth but can also occur in other areas of the mouth. Treatment options for a diastema include orthodontic treatment, dental bonding, or dental veneers.

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36.

The rounded enamel extensions on the incisal ridge of newly erupted central and lateral incisors are called:
- Mamelons.
- A fossa.
- A cingulum.
- A marginal ridge.
Correct Answer

A. Mamelons.

Explanation

Mamelons are rounded enamel extensions found on the incisal ridge of newly erupted central and lateral incisors. They are commonly seen in children and gradually wear down over time. Mamelons are considered a normal anatomical feature and are not present in all individuals. They can sometimes be mistaken for chips or fractures in the teeth, but they are actually just natural variations in tooth morphology.

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37.

Identify the tooth number.
- #1
- #16
- #17
- #32
Correct Answer

A. #1
38.

In the Universal Numbering System, the four first permanent molars are:
- #16, #26, #36, and #46.
- #3, #14, #19, and #30.
- #2, #15, #18, and #31.
- #18, #28, #38, and #48.
Correct Answer

A. #3, #14, #19, and #30.
39.

Correct contact between adjacent teeth is important because proper contact:
- Helps prevent food from being trapped between the teeth.
- Stabilizes the dental arch by holding teeth in positive contact with each other.
- Protects the interproximal gingival tissue from trauma during chewing.
- Does all of the above.
Correct Answer

A. Does all of the above.

Explanation

Proper contact between adjacent teeth is important because it helps prevent food from being trapped between the teeth, stabilizes the dental arch by holding teeth in positive contact with each other, and protects the interproximal gingival tissue from trauma during chewing.

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40.

Identify the tooth number.
- #7
- #8
- #9
- #10
Correct Answer

A. #9

Explanation

The correct answer is #9 because tooth numbers are assigned based on the Universal Numbering System, which is commonly used in dentistry. In this system, each tooth in the mouth is assigned a specific number. The numbers start from the upper right third molar (#1) and continue along the upper arch to the upper left third molar (#16). Then, the numbering continues from the lower left third molar (#17) to the lower right third molar (#32). Therefore, #9 corresponds to the upper right central incisor.

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41.

Permanent maxillary molars have _____ roots.
- Three
- Four
- Two
- One
Correct Answer

A. Three

Explanation

Permanent maxillary molars typically have three roots. This is a common characteristic of these molars, with each root providing stability and support to the tooth. The three roots are known as the mesiobuccal, distobuccal, and palatal roots. They are positioned in different directions, allowing for effective anchorage and distribution of forces during chewing and biting. The presence of three roots in permanent maxillary molars helps ensure their long-term durability and functionality.

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42.

The incisal surface of an anterior tooth is also known as the:
- Facial surface.
- Labial surface.
- Incisal edge.
- Incisal ridge.
Correct Answer

A. Incisal edge.

Explanation

The incisal surface of an anterior tooth refers to the biting edge of the tooth, which is used for cutting and tearing food. This term specifically applies to the front teeth, known as incisors. The other options mentioned, such as facial surface and labial surface, refer to the outer surface of the tooth, while incisal ridge refers to the curved ridge on the cutting edge of the tooth. Therefore, the correct term for the biting edge of an anterior tooth is the incisal edge.

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43.

The mandibular canines are usually the first permanent teeth to erupt in the oral cavity.
- True
- False
Correct Answer

A. False

Explanation

The mandibular canines are not usually the first permanent teeth to erupt in the oral cavity. The first permanent teeth to erupt are typically the mandibular first molars, which usually appear around the age of 6. The mandibular canines typically erupt after the mandibular first molars, usually around the age of 9-10. Therefore, the statement is false.

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44.

Which mandibular premolar is closest in form and function to a canine?
- Tooth # 21
- Tooth # 22
- Tooth # 29
- Tooth # 20
Correct Answer

A. Tooth # 21

Explanation

Tooth # 21 is the correct answer because it is the mandibular first premolar, which is the tooth closest in form and function to a canine. Canines have a single cusp and are used for tearing and cutting food, and the mandibular first premolar shares these characteristics.

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45.

In the maxillary arch, which tooth is larger?
- Maxillary first premolar
- Maxillary second premolar
Correct Answer

A. Maxillary first premolar

Explanation

The maxillary first premolar is larger than the maxillary second premolar in the maxillary arch. This is because the first premolar has a larger crown size and a more prominent root structure compared to the second premolar. The first premolar is located closer to the canine tooth, which requires a larger size to accommodate the chewing forces. Additionally, the first premolar often has two cusps, while the second premolar typically has one, contributing to its larger size.

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46.

In the mandibular arch, which tooth is larger?
- Mandibular first premolar
- Mandibular second premolar
Correct Answer

A. Mandibular second premolar

Explanation

The mandibular second premolar is larger than the mandibular first premolar. This is because the second premolar typically has a larger crown size and a longer root compared to the first premolar. Additionally, the second premolar usually has a more prominent cusps and a larger occlusal surface, which contributes to its larger size.

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47.

The root of the mandibular second premolar is ______ than that of a mandibular first premolar, but ______ than the roots of the maxillary premolars.
- Smaller; longer
- Longer; shorter
- Smaller; shorter
- Shorter; longer
Correct Answer

A. Longer; shorter

Explanation

The root of the mandibular second premolar is longer than that of a mandibular first premolar, but shorter than the roots of the maxillary premolars.

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48.

Which premolar is most likely to exhibit two root branches?
- Mandibular first premolar
- Mandibular second premolar
- Maxillary first premolar
- Maxillary second premolar
Correct Answer

A. Maxillary first premolar

Explanation

The maxillary first premolar is most likely to exhibit two root branches. This is because the maxillary first premolar typically has two roots, one buccal and one lingual. The other premolars mentioned, such as the mandibular first premolar, mandibular second premolar, and maxillary second premolar, usually have only one root.

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49.

Class lll of Angles classifications is also considered neutrocclusion
- True
- False
Correct Answer

A. False

Explanation

The statement in the question is incorrect. Class III of Angle's classifications is not considered neutrocclusion. Neutrocclusion refers to the ideal occlusion where the upper and lower teeth align properly. Class III occlusion, on the other hand, is a type of malocclusion where the lower jaw protrudes forward, causing the lower teeth to overlap the upper teeth. Therefore, the correct answer is False.

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Dentistry/Dental AST. Simulation Examination 8

The _____ are sometimes referred to as “wisdom” teeth.

Quiz Preview

There are no ______ in the primary dentition.

There are _____ molars in the permanent dentition.

The primary dentition has _____ molars and _____ premolars.

Most maxillary first premolars are considered to be ______ because they have a root that is divided into two roots.

Using the Universal/National Teeth-Numbering System, what are the numbers for the permanent third molars?

On the mandibular second premolar, the main groove pattern on the three cusp type takes the form of a...

Oral Cancer cases are more commonly found in African Americans.

A malignant tumor of boneforming tissue is called

There are ___ teeth in a quadrant of the primary dentition.

The smallest teeth in the permanent dentition are the:

The size, shape, color, and position of the _____ directly relate to how a person looks.

The primary teeth are classified in the Universal/National System using:

Identify the tooth number.

There are how many premolars in the permanent dentition?

The _____ are the longest teeth in the permanent dentition and are known as the cornerstone of the dental arches.

Centric occlusion is the maximum contact between the occluding surfaces of the maxillary and mandibular teeth.

At what age do the deciduous teeth start being replaced by permanent teeth?

Identify the tooth number.

Malignant melanoma of the oral cavity is rare however the most common introoral location is the

How many canines are in a quadrant of the permanent dentition?

The deciduous first maxillary molar has a transverse and oblique rige.

A mandibular canine tooth:

Which of the following premolars exhibits 3 pits?

Identify the tooth number.

Premolars and molars are used for _____ food.

The _____ premolar has two bifurcated roots.

The cusp of Carabelli is found on the:

Identify the tooth number.

Identify the tooth number.

A _____ is a pinpoint depression in the occlusal surface of a posterior tooth where two or more grooves meet.

A benign tumor of adipose tissue is called a

The most common malignant soft tissue tumor of the head and neck in children is

The root of the maxillary lateral incisor:

An unusually large space between adjacent teeth is known as a:

The rounded enamel extensions on the incisal ridge of newly erupted central and lateral incisors are called:

Identify the tooth number.

In the Universal Numbering System, the four first permanent molars are:

Correct contact between adjacent teeth is important because proper contact:

Identify the tooth number.

Permanent maxillary molars have _____ roots.

The incisal surface of an anterior tooth is also known as the:

The mandibular canines are usually the first permanent teeth to erupt in the oral cavity.

Which mandibular premolar is closest in form and function to a canine?

In the maxillary arch, which tooth is larger?

In the mandibular arch, which tooth is larger?

The root of the mandibular second premolar is ______ than that of a mandibular first premolar, but ______ than the roots of the maxillary premolars.

Which premolar is most likely to exhibit two root branches?

Class lll of Angles classifications is also considered neutrocclusion

The primary dentition has _ molars and _ premolars.

The root of the mandibular second premolar is than that of a mandibular first premolar, but than the roots of the maxillary premolars.