NBDE Test 1986

Arrange the three furcations of a maxillary first molar from closest to farthest from the cervical line.
(a) Facial (b) Mesial (c) Distal

Which of the following teeth have sharp demarcations between pulp chambers and pulp canals?
A) Maxillary lateral incisors B) Mandibular second premolars C) Mandibular canines D) Maxillary first premolars

The contact area, a self-protective feature of the dentition, functions to:
(A) prevent food impaction;
(B) protect mucosal tissues;
(C) distribute occlusal forces;
(d) form embrasures;
(e) stabilize the dental arch.

A) (a), (d) and (e)
B) (c) and (d)
C) (e) only
D) (b) and
(d)E) (a), (b) and (c)

Which of the following primary teeth has a distinctly prominent facial cervical ridge that makes it uniquely different from other teeth?

A) Mandibular first molar
B) Maxillary central incisor
C) Maxillary second molar
D) Mandibular canine
E) Maxillary canine

Identify the permanent anterior tooth that most frequently exhibits a bifurcated root and identify the positions of the roots

When an adult with normal occlusion moves his mandible from right lateral relation to centric occlusion, which cusp moves between facial cusps of the maxillary right second molar?

A) Distofacial cusp of the mandibular first molar
B) Distofacial cusp of the mandibular second molar
C) Mesiofacial cusp of the mandibular third molar
D) Mesiofacial cusp of the mandibular second molar
E) Distal cusp of the mandibular first molar

In an adult, which of the following occur normally while swallowing?

(a) Masseter muscles contract;
(b) The suprahyoid group of muscles relaxes;
(c) Teeth come into occlusal contact;
(d) The tip of the tongue touches the roof of the mouth.

In an otherwise normal arrangement, which of the following teeth are most often in abnormal relation and contact with adjacent teeth in the same arch?

Assuming occlusion and alignment are normal, the arrow on the sketch represents the path taken by the

A) facial cusp of a second premolar.
B) facial cusp of a first premolar
C) lingual cusp of a first premolar.
D) mesiolingual cusp of a first molar.
E) lingual cusp of a second premolar.

Which of the following permanent teeth have mesial concavities that require special attention when removing calculus deposits?: (a) Maxillary central incisors; (b) Maxillary first premolars; (c) Maxillary first molars; (d) Mandibular second premolars

The facial masticatory mucosa (attached gingiva) is narrowest on which mandibular tooth?

The mandibular movement indicated isA) left lateral, working side.B) protrusive.C) left lateral, non-working side.D) right lateral, working side.E) right lateral, non-working side.

In which of the following molars is the mesial fossa most distinctly separated from the remainder of the occlusal table by a transverse ridge?

A) Maxillary secondB) Mandibular secondC) Mandibular firstD) Maxillary first

In a normal occlusion, mandibular central incisors contact maxillary incisors in which of the following movements?:

(a) Protrusive; (b) Lateral (working); (c) Lateral (non-working); (d) Lateral protrusive

A lingual pit is most common on which of the following teeth?

A) Left lateral, working sideB) ProtrusiveC) Left lateral, non-working sideD) Right lateral, working sideE) Right lateral, non-working side

From a proximal view, which of the following permanent teeth tends to be positioned in the arch with its axis most nearly vertical?

The lingual surface of the crown of a mandibular canine is smooth and: (a) relatively flat in the fossa area; (b) poorly developed in the marginal ridge area; (c) poorly developed in the cingulum area.

A) (a) and (b)B) (c) only C) All of the aboveD) (a) onlyE) (b) onlyF) (b) and (c)

How soon after eruption of a permanent tooth is the apex usually fully developed?

The design of a restored occlusal surface is dependent upon the:
(a) contour of the articular eminence;
(b) position of the tooth in the arch;
(c) amount of lateral shift in the rotating condyle;
(d) amount of vertical overlap of anterior teeth.

The oblique ridge on a permanent maxillary first molar is reduced in height in the center of the occlusal surface and is nearly level with the

A) triangular ridge of the mesiofacial cusp.B) marginal ridge.C) None of the aboveD) cusp tip of the distofacial cusp.

A) mesiofacial cusp of a third molar.B) distofacial cusp of a second molar.C) distolingual cusp of a second molar.D) mesiofacial cusp of a second molar.E) mesiolingual cusp of a second molar.

During nonmasticatory swallowing, teeth are usually

A) in contact in intercuspal position.
B) protruded.
C) None of the above. This is a nonexistent act.
D) in a working arrangement.

The tooth most likely to exhibit a lingual groove that extends from the enamel onto the cemental area of the root is a permanent

When viewed from the mesial or the distal, the overall facial outline from cusp tip to root apex of a mandibular canine is:
(a) made up of two arcs;
(b) made up of one continuous arc;
(c) different from the outline of a maxillary canine;
(d) very similar to the outline of a maxillary canine.

A) (b) and (c)B) (a) and (c)C) (d) onlyD) (a) and (d)E) (b) and (d)

The ideal position and height of lingual cusps of a mandibular first molar accommodate which of the following?
A) Non-working movement
B) Centric relation
C) Working movement
D) Maximum intercuspation
E) Protrusive position