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

TMJ Biomechanics - 2 Flashcards

1
Q

blank joints with each movement of tmj

A

4

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2
Q

this separates upper and lower joint of tmj

A

temporomandibular disc

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3
Q

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

A

hinge

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4
Q

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

A

planar

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5
Q

tmj is a blank joint without blank and instead has blank

A

synovial, hyaline, fibrocartilage

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6
Q

orientation of disc

A

thick, thin, thick

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7
Q

poles of mandibular condyle

A

lateral, medial

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8
Q

unable to palpate blank pole

A

medial

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9
Q

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

A

open, zygomatic, close

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10
Q

muscle attaching to coronoid process

A

temporalis

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11
Q

temporalis bone has a blank where the blank sits

A

glenoid fossa, mandibular condyle

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12
Q

articular eminence of temporalis bone is blank bone

A

trabecular

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13
Q

temporalis articular eminence on mandibular condyle is blank on blank

A

convex, convex

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14
Q

glenoid fossa on mandibular condyle is blank on blank

A

convex, concave

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15
Q

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

A

thin/translucent, compression

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16
Q

contact when opening jaw occurs at the blank

A

articular eminence

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17
Q

articular eminence has blank cartilage

A

fibro

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18
Q

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

A

resists compression

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19
Q

deep fibers of articular eminence and condyle are aligned blank

A

perpendicular

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20
Q

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

A

parallel, shear forces

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21
Q

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

A

congruent

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22
Q

articular disk is blank to medial and lateral poles

A

firmly attached

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23
Q

articular disk is blank to medial and lateral capsule

A

not firmly attached

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24
Q

not firmly attached allows for blank

A

free rotation

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25
Q

articular disk is anteriorly attached to joint capsule and blank muscle

A

lateral pterygoid

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26
Q

lateral pterygoid muscle restricts blank

A

posterior translation

27
Q

articular disk is attached posteriorly to blank

A

bilaminar retrodiskal pad

28
Q

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

A

translation

29
Q

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

A

2mm, 3mm, 1mm

30
Q

anterior and posterior portions of articular disk are blank and blank

A

vascular, neural

31
Q

middle portion of articular disk is blank and blank

A

avascular, aneural

32
Q

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

A

chewing

33
Q

3 functions of articular disk

A

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
Q

increased pressure so disk rotation is between blank surfaces

A

articulating

35
Q

decreased pressure causes joint blank

A

disarticulation

36
Q

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

A

temporalis

37
Q

quadrilateral shaped muscle for elevation of tmj

A

masseter

38
Q

elevates mandible only muscle

A

medial pterygoid

39
Q

tmj muscle that rotates disc anteriorly on condyle with mouth closing

A

superior part of the lateral pterygoid

40
Q

lower part of blank causes depression of tmj

A

lateral pterygoid

41
Q

1 prime mandibular depression is the action of this muscle

A

digastrics (suprahyoids)

42
Q

digastrics account for blank mm of opening

A

40-55

43
Q

bilateral masseter, medial pterygoids and lateral creates blank of tmj

A

protrusion

44
Q

medial and lateral pterygoids create blank

A

lateral deviation

45
Q

medial pterygoids create blank lateral deviation

A

contra

46
Q

lateral pterygoids create blank lateral deviation

A

ipsi

47
Q

temporalis deviates tmj to blank side

A

ipsilateral

48
Q

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

A

anterior, anterior/inferior

49
Q

instantaneous center of rotation shifts blank during opening

A

anterior

50
Q

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

A

posterior/superior, posterior

51
Q

instantaneous center of rotation shifts blank during mouth closing

A

posterior

52
Q

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

A

anterior/inferior, posterior/superior

53
Q

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

A

spin, anterior

54
Q

firm approximation of dentition is called blank position

A

occlusal

55
Q

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

A

trauma

poor posture, clicking, locking, osteoarthritis

56
Q

reciprocal click is caused by blank displacement of the disk

A

anteromedial

57
Q

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

A

opening, closing

58
Q

reciprocal click is noted with blank upon opening

A

disk contact

59
Q

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

A

roll, translation

60
Q

aka grinding teeth

A

bruxism

61
Q

due to altered compressive and shear loading of tmj

A

osteoarthritis

62
Q

osteoarthritis is usually blank

A

unilateral

63
Q

loss blank teeth can lead to osteoarthritis more quickly

A

posterior

PT 506 Kinesio / Biomechanics (14 decks)

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