TMJ

Question 1

gnathology

Answer 1

masticatory mechanism as a whole

Question 2

hiltons law

Answer 2

muscles acting on a joint have the same nerve supply as the joint

Question 3

mandibular nerve

Answer 3

innervates: temporalis, masseter, medial/lateral pterygoid

Question 4

vasculization of TMJ and muscles

Answer 4

maxillary, facial, external carotid

Question 5

bones of tmj

Answer 5

glenoid fossa on under-surface of temporal bone

condyle of the mandible

Question 6

fibrocartilage

Answer 6

covers the condyle and articular eminence
covers all bony surface internal to joint capsule
protects from high friction and allows for constant change (can resume proliferative activity if needed)
“fibro connecctive tissue”

Question 7

the disk

Answer 7

coarse collagen fibers with interdispered fibroblastic cells
splits into two sheets which fuse with bone
forms joint capsule

Question 8

synovial fluid

Answer 8

dialysate of plasma supplemented by protein and proteoglycans
lubricates and reduces erosion
nutrient fluid
joint cavity lined by synovial membrane NOT epithelium

Question 9

type a cells

Answer 9

macrophage like, have surface filopodia, plasma membrane invaginations, pinocutotic vesicles
phagocyte things

Question 10

type b cell

Answer 10

synthesize the hyaluronate found in synovial fluid

Question 11

temporomandibular ligament

Answer 11

restricts displacement in three planes
1- lateral/ medial
2- inferior displacement (oblique comapinent) (outer)
3- posterior displaccement (horizontal componenet) (inner)

Question 12

pictures

Answer 12

LOOK IN BOOK

ch 13