NBDE Dental Anatomy and Occlusion 3

Question 1

Which landmark on the maxillary central incisor crown is used to distinguish it from the lateral incisor?

Accepted Answer

Sharper mesioincisal angle compared to the distoincisal angle

Answer

The maxillary central incisor has a sharper, more right-angled mesioincisal angle compared to the more rounded distoincisal angle, unlike the lateral incisor.

Question 2

Centric relation is best defined as:

Accepted Answer

The position where condyles are in their most superior-anterior position in the glenoid fossa

Answer

Centric relation is defined as the maxillomandibular relationship where the condyles are in their most superior and anterior position, braced against the articular eminence.

Question 3

Which cusp of the mandibular first molar is the largest?

Accepted Answer

Mesiobuccal cusp

Answer

The mesiobuccal cusp of the mandibular first molar is the largest cusp on this tooth.

Question 4

The curve of Spee is best described as:

Accepted Answer

The anteroposterior curve following the buccal cusp tips from canine to last molar

Answer

The curve of Spee is an anteroposterior (sagittal) curvature following the buccal cusp tips from the mandibular canine through the posterior teeth.

Question 5

A tooth with two roots and three canals is most likely which tooth?

Accepted Answer

Maxillary first premolar

Answer

The maxillary first premolar most commonly has two roots (buccal and palatal) and three root canals, making it unique among premolars.

NBDE - National Board Dental Examination Practice Test

NBDE - National Board Dental Examination Practice Test

NBDE Dental Anatomy and Occlusion 3