EX1; Mandibular Movements

Question 1

The essence of both anatomic and functional harmony is the balance between what

Answer 1

elevator and depressor muscles

Question 2

This is the strongest muscle in the whole body

Answer 2

masseter

Question 3

True or False

The angulation of the TMJ is the same for all people

Answer 3

False; is it different from one person to another

Question 4

What are the two movements of the mandible

Answer 4

rotation and translation

Question 5

This is the point at which the mandible rotates and translates about

Answer 5

terminal hing axis
transverse horizontal axis
THA

Question 6

This is the side of the mandible toward while the mandible moves

Answer 6

working

Question 7

This is a cone structure in which the mandible moves

Answer 7

Bennett’s movement

Question 8

Which condyle’s movement does Bennett’s movement describe

Answer 8

working

Question 9

What is the shape of chewing movement

Answer 9

tear drop

Question 10

This is the limit of movement

Answer 10

Ulf Posselt’s envelope of motion

Question 11

What is the initial point of contact involving Posselt’s envelope of motion

Answer 11

centric occlusion (CO)

Question 12

What are the five functions of anterior teeth

Answer 12

anterior guidance
perform initial acts of mastication
speech
lip support
esthetics

Question 13

What three things is anterior guidance dictated by

Answer 13

position of the incisal edge of the mandibular anterior teeth relative to the lingual surfaces of the maxillary anterior teeth
changes in morphology of the lingual surfaces of maxillary anterior teeth
length of mandibular incisors or canines

Question 14

What are the two subcategories of anterior guidance

Answer 14

incisal guidance

canine guidance

Question 15

What is the additional occlusal scheme besides anterior guidance

Answer 15

group function

Question 16

What three functions does the custom anterior guide table serve

Answer 16

when anterior teeth are prepared, the angulation of the custom guide provides anterior guidance in place of anterior teeth
when only the posterior teeth are to be replaces, the angulation of the guide serves to estimate the buccolingual and mesiodistal cusp angles, so as to avoid interferences in both protrusive and non-working excursions
reduce the amount of wear of the stone casts during excursive movements made on the articulator