NDEB Dental Anatomy and Occlusion 2

Question 1

In Angle Class I occlusion, the mesiobuccal cusp of the maxillary first molar occludes in the:

Accepted Answer

Buccal groove of the mandibular first molar

Answer

Mesial pit of the mandibular first molar

Answer

Distal fossa of the mandibular first molar

Answer

Mesial fossa of the mandibular second molar

Question 2

Centric relation is best described as:

Accepted Answer

The position where the condyles are in their most superior-anterior position against the articular eminences

Answer

Maximum intercuspation of all teeth

Answer

The rest position of the mandible with 2–4 mm freeway space

Answer

The habitual closing position of the mandible

Question 3

Bennett movement is defined as:

Accepted Answer

The bodily lateral shift of the mandible toward the working side during lateral excursion

Answer

Rotational hinge movement of the condyle during mouth opening

Answer

Protrusive movement of the mandible in the sagittal plane

Answer

Retrusion of the mandible from intercuspal position to centric relation

Question 4

During lateral excursion of the mandible, the non-working (balancing) side condyle moves:

Accepted Answer

Downward, forward, and medially

Answer

Upward and posteriorly

Answer

Only laterally without vertical change

Answer

Remains stationary within the glenoid fossa

Question 5

Canine-protected occlusion (canine guidance) is characterized by:

Accepted Answer

The canine discluding all posterior teeth during lateral excursions

Answer

All posterior teeth sharing load equally during lateral excursions

Answer

The canine tooth directing all mandibular movements including protrusion

Answer

Bilateral balanced contact on both working and non-working sides

Question 6

The Curve of Spee is best described as:

Accepted Answer

The anteroposterior curvature through the buccal cusp tips of mandibular teeth from canine to third molar

Answer

A lateral curve through the buccal and lingual cusp tips of mandibular posterior teeth

Answer

The curvature connecting mesial and distal marginal ridges of posterior teeth

Answer

The lateral curvature of the maxillary arch in the frontal plane

Question 7

Angle Class II, Division 2 malocclusion is characterized by:

Accepted Answer

Distal molar relationship with retroclined maxillary central incisors

Answer

Mesial molar relationship with proclined maxillary incisors

Answer

Normal molar relationship with a deep overbite only

Answer

Distal molar relationship with severely proclined maxillary central incisors