Dental Anatomy and Occlusion Quiz 13

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Question 1 of 20

1. Question

You are having a hard time mobilizing tooth No. 18 during a routine extraction. After looking at the radiograph again, you cannot see a PDL space all the way around the roots. Which of the following would best describe the reason why you can’t elevate the tooth?

It is ankylosed.
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It is a taurodont.
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It has a dilaceration.
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It has hypercementosis.
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It has a cervical enamel projection.
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Question 2 of 20

2. Question

All of the primary teeth have just completed root formation at what age?

1–1 1/2 years
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1 1/2–2 years
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2–3 years
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3–4 years
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4–5 years
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Question 3 of 20

3. Question

Which of the following jaw positions is determined almost exclusively by the behavior of the musculature?

Centric occlusion
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Centric relation
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Postural position
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All of the above
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Question 4 of 20

4. Question

In comparison to the maxillary canine, the mandibular canine has a

sharper cusp.
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more pronounced labial ridge.
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more cervical mesial contact
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centered cingulum
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more narrow mesiodistal crown width.
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Question 5 of 20

5. Question

All primary maxillary molars have three roots. All primary mandibular molars have two roots.

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 6 of 20

6. Question

Anterior guidance allows only the molars to disarticulate during protrusive movement. Cusp length is generally longest with a deep overbite and minimal overjet.

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 7 of 20

7. Question

Permanent canine cusps have mesial cusp ridges shorter than distal cusp ridges. Their crowns are wider faciolingually than mesiodistally.

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 8 of 20

8. Question

Aside from the mandibular lateral incisor, a distolingual twist of the incisal edge can be found on which of the following teeth?

Mandibular central incisor
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Maxillary lateral incisor
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Maxillary canine
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Mandibular canine
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Question 9 of 20

9. Question

The terminal hinge position occurs when the condyles are in the most _____ location within the glenoid fossa.

Anterior and superior
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Anterior and inferior
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Medial and superior
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Lateral and superior
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Posterior and superior
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Question 10 of 20

10. Question

Calcification of the permanent dentition typically starts at what time?

4–6 months in utero
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6–8 months in utero
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Birth D. 1–2 months postpartum
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2–4 months postpartum
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Question 11 of 20

11. Question

In which Angle classification would you typically find a deep overbite with proclined maxillary lateral incisors?

Class I
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Class II, division I
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Class II, division II
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Class III, division I
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Class III, division II
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Question 12 of 20

12. Question

Which incisor exhibits the most variability?

Maxillary central
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Maxillary lateral
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Mandibular central
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Mandibular lateral
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Question 13 of 20

13. Question

A labial ridge can be found on which tooth type?

Incisor
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Canine
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Premolar
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Molar
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Question 14 of 20

14. Question

Which of the following is not TRUE of primary teeth compared to permanent teeth?

They are generally whiter.
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Their crowns are more bulbous.
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Their CEJs are more constricted.
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Their root trunks are longer.
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Their pulp chambers are larger.
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Question 15 of 20

15. Question

The length of the permanent maxillary arch is about 8 mm longer than the permanent mandibular arch. The permanent arches are generally more circular than the primary arches.

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 16 of 20

16. Question

The lingual height-of-contour of all anterior teeth is in what segment of the crown?

Incisal 3rd
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Junction of the incisal and middle 3rds
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Middle 3rd
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Junction of the middle and cervical 3rds
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Cervical 3rd
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Question 17 of 20

17. Question

Which of the following best describes a Bennett shift?

The lateral movement of the working-side condyle in the opposite direction of the excursive movement
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The lateral movement of the working-side condyle in the same direction of the excursive movement
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The anterior translation of both condyles during protrusive movement
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The anterior translation of the contralateral condyle during lateral excursive movement
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The anterior translation of the ipsilateral condyle during lateral excursive movement
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Question 18 of 20

18. Question

Two pulp canals are most commonly found in which of the following teeth?

Maxillary 1st premolar
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Mandibular 1st premolar
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Maxillary 2nd premolar
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Mandibular 2nd premolar
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Question 19 of 20

19. Question

Which of the following premolars has a shorter buccal cusp than lingual cusp?

Maxillary 1st premolar
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Maxillary 2nd premolar
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Mandibular 1st premolar
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Mandibular 2nd premolar
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None of the above
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Question 20 of 20

20. Question

Maxillary incisor protrusion, anterior open bite, crowded laterals, and a high palatal vault are most likely caused by which of the following?

Mouth breathing
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Thumb sucking
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Tongue thrusting
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Nocturnal bruxism
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Dental Anatomy and Occlusion Quiz 13

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