NDEB Dental Anatomy and Occlusion 3

Question 1

The Wilson curve is best described as:

Accepted Answer

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

Answer

The anteroposterior curvature of the mandibular arch viewed from the side

Answer

The curvature formed by the incisal edges of all anterior teeth

Answer

The horizontal reference plane of the occlusal surface

Question 2

Fremitus in dentistry refers to:

Accepted Answer

Palpable or visible vibration in a tooth when the patient taps or slides the teeth together

Answer

Abnormal horizontal tooth mobility measured in millimeters

Answer

A clicking sound produced by the TMJ during mandibular opening

Answer

Pain elicited upon vertical percussion of a tooth

Question 3

The long axis of a tooth is defined as:

Accepted Answer

The axis running from the cusp tip or incisal edge to the root apex

Answer

The axis parallel to the occlusal plane of the tooth

Answer

The axis perpendicular to the proximal surface of the tooth

Answer

The horizontal axis through the center of the crown at its widest point

Question 4

Overjet is defined as:

Accepted Answer

The horizontal distance between the labial surface of the maxillary incisors and the labial surface of the mandibular incisors

Answer

The vertical overlap of maxillary incisors over mandibular incisors measured in millimeters

Answer

The distance between opposing buccal cusp tips in centric occlusion

Answer

The depth of the anterior curve of Spee

Question 5

The ideal vertical overlap (overbite) of maxillary over mandibular incisors in normal occlusion is approximately:

Accepted Answer

2–4 mm

Answer

0 mm (edge-to-edge)

Answer

1–2 mm

Answer

5–7 mm

Question 6

The palatogingival groove is a developmental anomaly most commonly associated with which tooth?

Accepted Answer

Maxillary lateral incisor

Answer

Maxillary central incisor

Answer

Maxillary first premolar

Answer

Mandibular first premolar

Question 7

Which statement best describes the concept of freeway space (interocclusal rest space)?

Accepted Answer

The vertical distance between the upper and lower teeth when the mandible is in physiologic rest position

Answer

The distance between the teeth in centric occlusion measured anteriorly

Answer

The horizontal space between the maxillary and mandibular arches at maximum opening

Answer

The space created between posterior teeth during protrusion