TMJ Biomechanics - 2 Flashcards Preview

PT 506 Kinesio / Biomechanics > TMJ Biomechanics - 2 > Flashcards

Flashcards in TMJ Biomechanics - 2 Deck (63):
1

blank joints with each movement of tmj

4

2

this separates upper and lower joint of tmj

temporomandibular disc

3

type of joint made by mandibular condyle and inferior surface of disk

hinge

4

type of joint made by articular eminence and superior surface of disk

planar

5

tmj is a blank joint without blank and instead has blank

synovial, hyaline, fibrocartilage

6

orientation of disc

thick, thin, thick

7

poles of mandibular condyle

lateral, medial

8

unable to palpate blank pole

medial

9

coronoid process is only palpable when mouth is blank because it goes under blank arch when blank

open, zygomatic, close

10

muscle attaching to coronoid process

temporalis

11

temporalis bone has a blank where the blank sits

glenoid fossa, mandibular condyle

12

articular eminence of temporalis bone is blank bone

trabecular

13

temporalis articular eminence on mandibular condyle is blank on blank

convex, convex

14

glenoid fossa on mandibular condyle is blank on blank

convex, concave

15

condyle at glenoid fossa is blank which means it cannot resist blank

thin/translucent, compression

16

contact when opening jaw occurs at the blank

articular eminence

17

articular eminence has blank cartilage

fibro

18

most fibrocartilage is found at articular eminence and anterosuperior condyle which shows that it blank

resists compression

19

deep fibers of articular eminence and condyle are aligned blank

perpendicular

20

superficial fibers of articular eminence and condyle are aligned blank for blank

parallel, shear forces

21

tmj is blank because it goes convex, concave, concave, convex

congruent

22

articular disk is blank to medial and lateral poles

firmly attached

23

articular disk is blank to medial and lateral capsule

not firmly attached

24

not firmly attached allows for blank

free rotation

25

articular disk is anteriorly attached to joint capsule and blank muscle

lateral pterygoid

26

lateral pterygoid muscle restricts blank

posterior translation

27

articular disk is attached posteriorly to blank

bilaminar retrodiskal pad

28

articular disk allows for anterior disk blank with mouth opening and repositioning of disk

translation

29

thickness goes blank anteriorly, blank posteriorly, and blank in the middle

2mm, 3mm, 1mm

30

anterior and posterior portions of articular disk are blank and blank

vascular, neural

31

middle portion of articular disk is blank and blank

avascular, aneural

32

middle portion of articular disk do not have nerves because it would hurt when blank

chewing

33

3 functions of articular disk

increased congruence of joint surface, shape allows disc to conform to bony surfaces with rotation and translation, thick thin thick arrangement centers the condyle on disk

34

increased pressure so disk rotation is between blank surfaces

articulating

35

decreased pressure causes joint blank

disarticulation

36

muscle that is fan shaped with extensive attachments inserting at coronoid process for elevation

temporalis

37

quadrilateral shaped muscle for elevation of tmj

masseter

38

elevates mandible only muscle

medial pterygoid

39

tmj muscle that rotates disc anteriorly on condyle with mouth closing

superior part of the lateral pterygoid

40

lower part of blank causes depression of tmj

lateral pterygoid

41

1 prime mandibular depression is the action of this muscle

digastrics (suprahyoids)

42

digastrics account for blank mm of opening

40-55

43

bilateral masseter, medial pterygoids and lateral creates blank of tmj

protrusion

44

medial and lateral pterygoids create blank

lateral deviation

45

medial pterygoids create blank lateral deviation

contra

46

lateral pterygoids create blank lateral deviation

ipsi

47

temporalis deviates tmj to blank side

ipsilateral

48

mouth opening there is initial blank roll of condyle followed by blank translation of disk and condyle nearing opening

anterior, anterior/inferior

49

instantaneous center of rotation shifts blank during opening

anterior

50

mouth opening there is initial blank translation of disk followed by blank roll of condyle nearing opening

posterior/superior, posterior

51

instantaneous center of rotation shifts blank during mouth closing

posterior

52

during mandibular protrusion and retrusion there is bilateral condyle translation blank/blank or blank/blank along articular eminence

anterior/inferior, posterior/superior

53

left lateral deviation there is left condylar and disk blank about a vertical axis combined with right condylar blank translation or gliding

spin, anterior

54

firm approximation of dentition is called blank position

occlusal

55

pathomechanics of tmj are secondary to direct blank such as ... name 3

trauma

poor posture, clicking, locking, osteoarthritis

56

reciprocal click is caused by blank displacement of the disk

anteromedial

57

reciprocal click is noted on blank and a second click upon blank

opening, closing

58

reciprocal click is noted with blank upon opening

disk contact

59

locking is when only blank occurs with no anterior or posterior blank of the condyle

roll, translation

60

aka grinding teeth

bruxism

61

due to altered compressive and shear loading of tmj

osteoarthritis

62

osteoarthritis is usually blank

unilateral

63

loss blank teeth can lead to osteoarthritis more quickly

posterior