tmj

Question 0

articular eminence

Answer 0

primary articular surface
high forces when bitting
no hyaline cartilage (FIBROCARTILAGE)
their for can repair and remodel**

Question 1

Mandibular fossa

Answer 1

thin bone, not good joint surface

Question 2

articular disc

Answer 2

needed due to incongruent joint

Question 3

inferior tmj

Answer 3

mandibular condyle and inferior surface disc

hinge joint

Question 4

superior TMJ

Answer 4

articular eminence and superior surface disc

Question 5

articular disc function

Answer 5

increases stability
minimizes loss of mobility
reduces friction and biomechanic stress
collagen - can not repair and remodel

Question 6

superior lamina (Bilaminar retrodisc Pad)

Answer 6

allows disc to translate anteriorly (opening)

assits with closing

Question 7

inferior lamina (bilaminar retrodisc pad)

Answer 7

limits forward translation

Question 8

joint capsule

Answer 8

loose (anterior, medial, posterior)
strong laterally
therefore dislocates anterior

Question 9

temporomandibular ligament

Answer 9

limits downward, posterior, rotation mandibular depression

Question 10

depression opening

Answer 10

rolling ( anteriorly)
condyle/inferior disc

gliding (anteriorly)
superior disc

Question 11

lateral pterygoid

Answer 11

attaches to anterior disc
eccentric** when closing
eccentric control of disc when closing
protrusion and contralateral deviation

Question 12

protrusion

Answer 12

articular eminence/ superior disc
lower teeth pass upper teeth important for opening
limited by bilaminar retrodiscal tissue
anterior glide

Question 13

retrusion

Answer 13

articular eminence/superior disc 
important closing
limited by temporomandibular ligament
compression of retrodiscal area
posterior glide

Question 14

lateral excursion

Answer 14

ipsilateral condyle (spin in transverse plane)
contralateral condyle translates anterior

Question 15

deviation

Answer 15

'’S’’ curve midline and back

Question 16

deflection

Answer 16

'’C’’ curve

does not return to midline

Question 17

primary muscles

Answer 17

temporalis ( closing, retrusin, and ipsilateral deviation )

muscles of mastication

Question 18

lateral pterygoid

Answer 18

protrusion and contralateral deviation

eccentric* control of disc when closing

Question 19

medial pterygoid

Answer 19

closing **and protrusion

contralateral deviation

Question 20

suprahyoid group

Answer 20

mandibular depression

Question 21

infrahyoid group

Answer 21

stabilizes hyoid

Question 22

forward head posture

Answer 22

rotates head posteriorly
retrudes jaw
compresses retrodiscal tissue
massication muscle overwork to close jaw