Dental Anatomy and Occlusion Quiz 9

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Question 1 of 20

1. Question

When viewed from the occlusal, the proximal contact between mandibular 1st and 2nd molars is located

slightly lingual to the middle 3rd.
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in the middle 3rd.
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slightly buccal to the middle 3rd.
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in the cervical 3rd.
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Question 2 of 20

2. Question

How many teeth in the primary dentition normally have a cingulum? A

6
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8
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10
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12
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14
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Incorrect
Question 3 of 20

3. Question

The maxillary buccal and mandibular lingual cusps function as supporting cusps in which of the following occlusal schemes?

Ideal intercuspal relationship
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Nonworking side movement
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Working-side movement
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Posterior crossbite
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Question 4 of 20

4. Question

A 25-year-old patient presents with mamelons on the incisors. Which of the following is the most likely explanation for this finding?

Posterior crossbite
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Anterior crossbite
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Variation of normal
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Anterior open bite
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Nocturnal bruxism
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Question 5 of 20

5. Question

Which muscle inserts in the articular disc and condylar neck?

Masseter
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Medial pterygoid
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Lateral pterygoid
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Temporalis
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Question 6 of 20

6. Question

All of the following are true of the functional outer aspect (FOA) in ideal occlusions EXCEPT

it is located on the outer aspect of supporting cusps.
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it may contact the inner incline of supporting cusps.
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in the mandibular arch, it is a continuous ribbon which runs from the buccal of one 3rd molar to the other, covering the incisal edges of the lower anterior teeth.
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it does not exist on maxillary anterior teeth. E. it is no more than 1 mm wide.
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Question 7 of 20

7. Question

All posterior teeth have a height-of-contour located in which segment of the crown?

Occlusal 3rd of the lingual surface
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Middle 3rd of the buccal surface
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Middle 3rd of the lingual surface
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Cervical 3rd of the lingual surface
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Question 8 of 20

8. Question

The maxillary 1st premolar typically has a pulp chamber of what shape (at the level of the CEJ)?

Round
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Egg shaped
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Oval (flattened mesiodistally)
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Oval (flattened buccolingually)
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Rectangular
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Question 9 of 20

9. Question

During mandibular movement, which aspect of a mandibular molar will never contact its maxillary antagonist, assuming all occlusal relationships are ideal?

Outer aspect of the buccal cusps
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Inner aspect of the buccal cusps
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Inner aspect of the lingual cusps
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Outer aspect of the lingual cusps
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Question 10 of 20

10. Question

Which succedaneous tooth erupts beneath tooth J?

1
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10
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13
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20
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21
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Question 11 of 20

11. Question

The greatest contour of the cervical line (CEJ) can be found on the

mesial aspect of anterior teeth.
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mesial aspect of posterior teeth.
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distal aspect of anterior teeth.
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distal aspect of posterior teeth.
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Question 12 of 20

12. Question

Which cusp on permanent maxillary molars generally gets progressively smaller from the 1st to the 3rd molar?

Mesiolingual
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Distolingual
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Mesiobuccal
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Distobuccal
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Question 13 of 20

13. Question

A working interference is a premature contact of the posterior teeth on the same side as the direction of the mandibular movement. A protrusive interference is a premature contact between the mesial aspects of maxillary posterior teeth and the distal aspects of mandibular posterior teeth.

Both statements are true.
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Both statements are false
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The first statement is true; the second statement is false.
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The first statement is false; the second statement is true.
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Question 14 of 20

14. Question

Which of the following teeth contacts only one other tooth in the opposing arch in an ideal occlusion?

Maxillary central incisor
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Maxillary lateral incisor
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Mandibular central incisor
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Maxillary 3rd molar
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Both C and D
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Question 15 of 20

15. Question

Which of the following has the highest frequency of impaction?

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

16. Question

A cervical ridge is found on the facial surface of how many primary teeth?

4
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8
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12
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16
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20
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Question 17 of 20

17. Question

Which cusp has two triangular ridges on the maxillary 1st molar? A

Mesiolingual
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Distolingual
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Cusp of Carabelli
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Mesiobuccal
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Distobuccal
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Question 18 of 20

18. Question

The incisal edge or cusp tip of which tooth ideally lies in the facial embrasure between the mandibular canine and mandibular 1st premolar?

Maxillary lateral incisor
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Maxillary canine
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Maxillary 1st premolar
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Maxillary 2nd premolar
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Question 19 of 20

19. Question

Which cusp is most likely to be absent on a maxillary 2nd molar?

Mesiolingual
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Distolingual
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Cusp of Carabelli
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Mesiobuccal
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Distobuccal
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Question 20 of 20

20. Question

The bud stage of tooth development starts at about

6 weeks in utero.
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8 weeks in utero.
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9 weeks in utero.
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11 weeks in utero.
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18 weeks in utero.
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Dental Anatomy and Occlusion Quiz 9

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