Year 4

Question 1

Describe the physiologic rest position

Answer 1

The mandibular position assumed when the head is in an upright unsupported position and the involved muscles (elevator and depressor groups) are in equilibrium in tonic contraction, and the condyles are in a neutral, unstrained position

Question 2

Describe the rest vertical dimension

Answer 2

The vertical dimension of the lower face with the mandible in the rest position

Question 3

Describe the occlusal vertical dimension

Answer 3

The vertical dimension of the lower face with the teeth in centric occlusion

Question 4

Describe the free way space

Answer 4

Difference between RVD and OVD, usually 2-4mm at the incisors

Question 5

Describe the retruded arc of closure

Answer 5

The arc described by any point on the mandible during a closing movement made with the condyles in their most posteriorpositions

Question 6

Describe the retruded contact position

Answer 6

The relation of the mandible to the maxilla with the mandible in its most retruded position at a prescribed occlusal vertical dimension, usually 2-4 mm less than rest vertical dimension

Question 7

Describe intercuspal position

Answer 7

The mandibular position that gives maximum tooth contact

Question 8

Define balanced occlusion

Answer 8

A static relationship
The simultaneous even occlusal contact between maxillary and mandibular teeth bilaterally or anteriorly-posteriorly

Question 9

Define balanced articulation

Answer 9

A dynamic relationship
The simultaneous bilateral, or anterior and posterior, occlusal contacts between maxillary and mandibular teeth during the movement from one balanced occlusion (i.e. during function) to another

Question 10

5 factors of balanced articulation (Hanau’s Quintet)

Answer 10

Condylar guidance
Incisal guidance
Cuspal angles (height)
Plane of occlusion
Compensating curves