Dental Anatomy and Occlusion Quiz 11

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Question 1 of 20

1. Question

Ordinarily, a 7-year-old child would have what teeth clinically visible in the mouth?

All 20 primary teeth and 4 permanent 1st molars
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18 primary teeth and 2 permanent teeth
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16 primary teeth and 8 permanent teeth
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12 primary teeth and 12 permanent teeth
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Question 2 of 20

2. Question

In an Angle class III malocclusion, the cusp tip of the maxillary canine is located

distal to the buccal embrasure created by the mandibular canine and 1st premolar.
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centered in the embrasure created by the mandibular canine and 1st premolar.
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mesial to the buccal embrasure created by the mandibular canine and 1st premolar.
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none of the above.
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Question 3 of 20

3. Question

The 2nd largest cusp on a mandibular 2nd molar is the

mesiolingual
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distolingual
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mesiobuccal
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distobuccal
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distal
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Question 4 of 20

4. Question

All of the following are true of the articular disc EXCEPT

it is biconcave, with a central avascular intermediate zone.
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it is composed of dense hyaline cartilage
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it consists of thick anterior and posterior bands.
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fibers of the lateral pterygoid attach to its most anterior portion.
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it divides the area between the glenoid fossa and the condyle into two compartments: superior and inferior.
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Question 5 of 20

5. Question

After preparing an ideal endodontic access for tooth No. 3, you notice a 4th canal. In which root is this 4th canal most likely located?

Mesiobuccal
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Distobuccal
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Palatal
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Any of the above
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Question 6 of 20

6. Question

Which tooth has the greatest root-to-crown ratio?

Maxillary central incisor
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Maxillary canine
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Mandibular canine
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Mandibular 1st molar
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Question 7 of 20

7. Question

Which of the following is correct?

VDR = VDO – FS
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VDO = CO – FS
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VDR = VDO + FS
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VDO = CO + CR
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VDR = VDO + CO
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Question 8 of 20

8. Question

A 30-year-old patient presents with shallow, cup-shaped depressions on the cervicofacial surface of the maxillary anterior teeth. The posterior teeth also exhibit extensive loss of the occlusal surface, including numerous noncarious class VI lesions. Tooth No. 30 has an amalgam restoration that extends about 1 mm above the level of the tooth structure. Which of the following is the most likely cause of this wear?

Abfraction
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Attrition
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Erosion
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Abrasion
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Question 9 of 20

9. Question

Mandibular molar crowns tilt lingually at the cervix. Maxillary molar crowns are aligned directly over the roots.

Both statements are true.
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Both statements are false.
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The first statement is true; the second is false.
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The first statement is false; the second is true.
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Question 10 of 20

10. Question

Which of the following primary teeth has the longest root?

Maxillary central incisor
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Maxillary canine
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Maxillary 2nd molar
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Mandibular canine
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Mandibular 2nd molar
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Question 11 of 20

11. Question

The crowns of all primary teeth begin to calcify at what time?

2-4 months in utero
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4-6 months in utero
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6-8 months in utero
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At birth
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2-4 months postpartum
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Question 12 of 20

12. Question

Which is the principal muscle that protrudes the mandible?

Masseter
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Medial pterygoid
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Lateral pterygoid
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Temporalis
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Question 13 of 20

13. Question

Which of the following is the most reproducible mandibular position?

Centric occlusion
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Functional occlusion
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Postural position
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Centric relation
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Question 14 of 20

14. Question

Mandibular molars usually have how many roots?

1
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2
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3
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4
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5
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Question 15 of 20

15. Question

A “zig-zag” occlusal pattern can be found on which of the following teeth?

Mandibular 2nd molar
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Mandibular 1st molar
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Maxillary 2nd molar
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Maxillary 1st molar
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Maxillary 2nd premolar
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Question 16 of 20

16. Question

Which of the following points in the sagittal view of Posselt envelope of motion below is centric occlusion?

(Assume point C represents the most superior position)

A
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B
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C
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D
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E
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Question 17 of 20

17. Question

All anterior teeth develop from how many lobes?

2
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3
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4
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5
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6
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Question 18 of 20

18. Question

After a difficult extraction of tooth No. 31, you notice that your patient’s jaw cannot close. You diagnose the problem as a right-side TMJ dislocation. What is the initial direction that you should redirect the mandible to treat the problem?

Push the ramus superiorly
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Push the ramus posteriorly
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Push the ramus downward
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Slide the ramus mesially
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Slide the ramus laterally
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Question 19 of 20

19. Question

Which of the following teeth is most likely to be congenitally absent?

Maxillary lateral incisor
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Maxillary canine
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Mandibular canine
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Mandibular 1st premolar
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Mandibular 2nd premolar
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Question 20 of 20

20. Question

In which age range would one normally expect to see all 20 primary teeth present, but no permanent teeth yet visible?

0.5-1 years
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1-1.5 years
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1-2 years
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2.5-5.5 years
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3.5-6.5 years
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Dental Anatomy and Occlusion Quiz 11

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