TMJ Biomechanics - 2

Question 1

blank joints with each movement of tmj

Answer 1

4

Question 2

this separates upper and lower joint of tmj

Answer 2

temporomandibular disc

Question 3

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

Answer 3

hinge

Question 4

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

Answer 4

planar

Question 5

tmj is a blank joint without blank and instead has blank

Answer 5

synovial, hyaline, fibrocartilage

Question 6

orientation of disc

Answer 6

thick, thin, thick

Question 7

poles of mandibular condyle

Answer 7

lateral, medial

Question 8

unable to palpate blank pole

Answer 8

medial

Question 9

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

Answer 9

open, zygomatic, close

Question 10

muscle attaching to coronoid process

Answer 10

temporalis

Question 11

temporalis bone has a blank where the blank sits

Answer 11

glenoid fossa, mandibular condyle

Question 12

articular eminence of temporalis bone is blank bone

Answer 12

trabecular

Question 13

temporalis articular eminence on mandibular condyle is blank on blank

Answer 13

convex, convex

Question 14

glenoid fossa on mandibular condyle is blank on blank

Answer 14

convex, concave

Question 15

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

Answer 15

thin/translucent, compression

Question 16

contact when opening jaw occurs at the blank

Answer 16

articular eminence

Question 17

articular eminence has blank cartilage

Answer 17

fibro

Question 18

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

Answer 18

resists compression

Question 19

deep fibers of articular eminence and condyle are aligned blank

Answer 19

perpendicular

Question 20

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

Answer 20

parallel, shear forces

Question 21

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

Answer 21

congruent

Question 22

articular disk is blank to medial and lateral poles

Answer 22

firmly attached

Question 23

articular disk is blank to medial and lateral capsule

Answer 23

not firmly attached

Question 24

not firmly attached allows for blank

Answer 24

free rotation

Question 25

articular disk is anteriorly attached to joint capsule and blank muscle

Answer 25

lateral pterygoid

Question 26

lateral pterygoid muscle restricts blank

Answer 26

posterior translation

Question 27

articular disk is attached posteriorly to blank

Answer 27

bilaminar retrodiskal pad

Question 28

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

Answer 28

translation

Question 29

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

Answer 29

2mm, 3mm, 1mm

Question 30

anterior and posterior portions of articular disk are blank and blank

Answer 30

vascular, neural

Question 31

middle portion of articular disk is blank and blank

Answer 31

avascular, aneural

Question 32

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

Answer 32

chewing

Question 33

3 functions of articular disk

Answer 33

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

Question 34

increased pressure so disk rotation is between blank surfaces

Answer 34

articulating

Question 35

decreased pressure causes joint blank

Answer 35

disarticulation

Question 36

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

Answer 36

temporalis

Question 37

quadrilateral shaped muscle for elevation of tmj

Answer 37

masseter

Question 38

elevates mandible only muscle

Answer 38

medial pterygoid

Question 39

tmj muscle that rotates disc anteriorly on condyle with mouth closing

Answer 39

superior part of the lateral pterygoid

Question 40

lower part of blank causes depression of tmj

Answer 40

lateral pterygoid

Question 41

1 prime mandibular depression is the action of this muscle

Answer 41

digastrics (suprahyoids)

Question 42

digastrics account for blank mm of opening

Answer 42

40-55

Question 43

bilateral masseter, medial pterygoids and lateral creates blank of tmj

Answer 43

protrusion

Question 44

medial and lateral pterygoids create blank

Answer 44

lateral deviation

Question 45

medial pterygoids create blank lateral deviation

Answer 45

contra

Question 46

lateral pterygoids create blank lateral deviation

Answer 46

ipsi

Question 47

temporalis deviates tmj to blank side

Answer 47

ipsilateral

Question 48

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

Answer 48

anterior, anterior/inferior

Question 49

instantaneous center of rotation shifts blank during opening

Answer 49

anterior

Question 50

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

Answer 50

posterior/superior, posterior

Question 51

instantaneous center of rotation shifts blank during mouth closing

Answer 51

posterior

Question 52

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

Answer 52

anterior/inferior, posterior/superior

Question 53

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

Answer 53

spin, anterior

Question 54

firm approximation of dentition is called blank position

Answer 54

occlusal

Question 55

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

Answer 55

trauma poor posture, clicking, locking, osteoarthritis

Question 56

reciprocal click is caused by blank displacement of the disk

Answer 56

anteromedial

Question 57

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

Answer 57

opening, closing

Question 58

reciprocal click is noted with blank upon opening

Answer 58

disk contact

Question 59

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

Answer 59

roll, translation

Question 60

aka grinding teeth

Answer 60

bruxism

Question 61

due to altered compressive and shear loading of tmj

Answer 61

osteoarthritis

Question 62

osteoarthritis is usually blank

Answer 62

unilateral

Question 63

loss blank teeth can lead to osteoarthritis more quickly

Answer 63

posterior