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MSK3 > TMJ > Flashcards

TMJ Flashcards

1
Q

mm of mastication

A

Temporalis
Masseter
Medial Pterygoid
Lateral Pterygoid

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2
Q

temporalis
action

A

elevate mandible

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3
Q

masseter action

A

elevation and protrusion of mandible

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4
Q

medial pterygoid action

A

elevation and protrusion of mandible

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5
Q

lateral pterygoid action

A

protrude and depress mandible, lateral deviation of mandible

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6
Q

infa hyoid’s innervations

A

Innervated by branches of C1-C3
Depress hyoid

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7
Q

suprahyoids

A

Elevates hyoid
Digastric: depresses mandible against resistance and elevates hyoid

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8
Q

arthrology of TMJ

A

50% of motion occurs as rolling in the lower joint
Condyle on the temporal bone
Disc remains stationary

50% of motion occurs in the upper joint as gliding
Begins at mid-opening
Disc pulled anteriomedially by lateral pterygoid
Condyle along sigmoid-shaped temporal bone
Disc slides along with condyle

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9
Q

ROM norms for TMJ

A
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10
Q

differential for TMJ

A

cervical refferal
intra oral - dental
peripheral neuralgia
cardiac referral
HA- cervicogenic?

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11
Q

mastication mm disorder

A

Strain
Direct trauma (blow to the face, excessive widening with dental procedure, etc.)

Overuse injury:
Parafunctions (grinding, nail biting, etc.)
Guarding

Centrally mediated pain

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12
Q

s/s of mastication mm disorder

A

Can result in reduced motion & alter occlusion
Can result in trigger points with pain referral to face, teeth, auricular area, temporal area, periocular area, & upper cervical area

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13
Q

PE for mastication mm disorder

A

Tenderness & increased turgor of muscles of mastication
Aberrant motion pattern with AROM testing
limited ROM
Pain with resistance testing to involved structure
Pain with tongue depressor biting on ipsilateral side

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14
Q

MOI for joint dysfunction

A

Macrotrauma
Microtrauma
E.g. repetitive loading with condyle sliding over disc, repetitive compression/ tensile loading of retrodiscal tissue

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15
Q

DDWR vs DDWOR

A

DDWR
Audible clicking and/ or palpable clicking (1/3 trials)
Joint motion typically intact
DDWOR
Report of catching sensation with opening/ closing
Limitations in opening ROM

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16
Q

DDWR vs DDWOR

A

DDWR
Audible clicking and/ or palpable clicking (1/3 trials)
Joint motion typically intact
DDWOR
Report of catching sensation with opening/ closing
Limitations in opening ROM

17
Q

general findings for joint dysfunciton

A

Preauricular pain commonly primary complaint
Painful palpation of joint line
Pain with tests that place compressive load on joint structures

18
Q

pathomechanics deviation
C
S

A

c-type curve
Anterior displacement of a disc (ipsilaterally) without reduction or unilateral muscle hypomobility
Hypomobility of ipsilateral joint
S-type curve
Muscular imbalance or medial displacement
Condyle “walks around the disc”

19
Q

biomechanics for deviation

A

Early deviation: spasm
Late deviation: capsulitis/ tight capsule

20
Q

clicking vs reciprocal clicking

A

Clicking
Partial anterior displacement or dislocation of the disc in resting position
Opening click indicating reduction of the disc as the mandibular condyle passes over the posterior border
Reciprocal Clicking: Clicking occurs with closing
Condyle slips posteriorly over (anteriorly) displaced disc

21
Q

open lock what is it

A

Condyle moves over the anterior rim of the disc at max opening
The disc lies posterior to the condyle outside of the fossa, preventing the condyle from sliding back
Masseter and temporalis guard

22
Q

closed lock what is it

A

Disc displacement without reduction
Partial anterior displacement or dislocation of the disc in resting position
Mandibular condyle unable to pass over the posterior border of the disc with opening (disc remains bunched anterior to the mandibular condyle)

23
Q

OMs

A

PSFS
Tampa Scale of Kinesiphobia for TMD
Temporomandibular Pain Disorder Screening Instrument

24
Q

what is malocclusion

A

how far your chin sticks out or in

25
Q

open bite malocclusion

A

(space between front teeth when mouth is closed)
chin so far back teeth aren’t fully closed

26
Q

Retrognathism malocclusion

A

jaw slightly posterior

27
Q

prognathism malocclusion

A

jaw forward under bite
like a super hero
can talk about mandible or maxilla

28
Q

how many TMD need sx

A

20%

MSK3 (6 decks)

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