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KINES > Tmj > Flashcards

Tmj Flashcards

0
Q

Secondary curves?

A

Cervical, lumbar

Anterior convexity

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1
Q

Primary curves?

A

Thoracic, sacral

Posterior convexity

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2
Q

What do the condyles of the mandible sit in?

A

Mandibular Fossa
Post glenoid tubercle (posteriorly)
Articular eminence (Anteriorly)

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3
Q

type of joint tmj?

A

Snyovial

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4
Q

Proximal/stationary part of tmj

A

Temporal bone

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5
Q

Primary articular surface of mandibular condyle?

A

Articular eminence

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6
Q

Kind of cartilage Articular eminence has?

A

Fibrocartilage
Can repair and remodel
High forces when biting

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7
Q

Incongruent joint?

A 
Articular eminence (convex) 
Mandible condyles (convex)
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8
Q

Inferior tmj joint ?

Type of joint ?

A

1st joint
Mandibular condyle + inferior surface disc
Hinge joint

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9
Q

Superior tmj joint

A

2nd joint

Articular eminence + superior surface disc

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10
Q

What is the disc attached to?

A

Medial/ lateral poles of condyles

Allow Condyle to rotate freely on disc in anterior/posterior direction

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11
Q

Disc attached to anteriorly?

What do they restrict?

A

Joint capsule
Lateral pterygoid muscle
Restrict posterior translation of disc

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12
Q

What is the disc attached to Posteriorly?

A

Bilaminar retrodiscal pad

Superior/inferior lamina

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13
Q

Superior lamina of bilaminar retrodiscal pad allows?

A

Disc to translate anteriorly (opening)

Assist with closing

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14
Q

Inferior lamina of bilaminar retrodiscal pad limits?

A

Anterior translation

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15
Q

If someone dislocates their jaw anteriroly what would be stretched?

A

Inferior lamina

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16
Q

Function of Articular disc? (5)

A 
Increase stability
Min loss of mobility
Reduces friction 
Decreases street 
Collage, glyco, elastin= cannot repair/remodel
17
Q

Where is the capsule loose?

A

Anterior (mostly)
medial
Posteriorly

18
Q

Where is the capsule strong ?

A

Laterally

19
Q

TMJ ligament limits?

A

Downward/ posterior motion of mandible
Rotation during mandibular depression
Lateral displacement

20
Q

What does the stylomandibular lig limit?

A

Protrusion

21
Q

Osteokinamatics of tmj

A 
Depression 
Elevation
Protrusion
Retrusion
Lateral excursion
22
Q

ROM for depression

A

40-50 mm

23
Q

What happens in depression?

A 
Anterior roll (condyle/inferior disc) 
Anterior glide (superior disc/ Articular eminence)
24
Q

What happens in elevation ?

A 
Posterior roll (condyle/inferior disc)
Posterior glide (superior disc/ Articular eminence)
25
Q

What controls the disc and attaches anteriorly during elevation ?

A

Lateral pterygoid

Eccentric control

26
Q

What limits protrusion?

A

Superior lamina of retrodiscal tissue

27
Q

Protrusion is important for?

A

Opening/depression

28
Q

Protrusion/Retrusion occur?

A

In the upper tm joint

29
Q

Retrusion is important for?

A

Closing your mouth

30
Q

What is retrusion limited by?

A

Temporomandibular ligament

Compression of retrodiscal area

31
Q

ROM for lateral excursion?

A

8-11 mm

32
Q

Lateral excursion arthro?

A

Ipsilateral condyle = spin in transverse plane in Fossa

Contralateral condyle = translates anteriorly along anterior eminence

33
Q

Deviation?

A

S curve

Mandible moves away from midline then back

34
Q

Deflection?

A

C curve

Mandible moves away from midline doesnt come back

35
Q

Primary muscles of tmj?

A

Temporalis
Masseter
Lateral pterygoid
Medial pterygoid

36
Q

Temporalis?

A

Closing, retrusion

Ipsilateral deviation

37
Q

Masseter?

A

Closing/retrusion

38
Q

Lateral pterygoid?

A

Protrusion
Contralateral deviation
Eccentric control disc upon closing

39
Q

Medial pterygoid ?

A

Closing
Protrusion
Contralateral deviation

40
Q

Secondary muscle?

A

Suprahyoid (mandibular depression)

Infrahyoid (stabalize hyoid)

41
Q

Resting posture of tmj

A

1.5-5 mm open

KINES (4 decks)

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