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Flashcards in TMJ dysfunction Deck (39)
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1

TMJ joint - convex articular condyl of the manidble and the concave articular fossa on the squamous portion of the temporal bone make up this ____ joint

gliding

2

3 parts of meniscus of teh TMJ

thick anterior band
thin intermediate zone
thick posterior band

3

when the mouth is closed, the condyle is separated from the articular fossa of the temporal bone by

the thick posteiror band portion of the meniscus

4

when the mouth is open, the condyle is separated from the articular eminence of the temporal bone by

the thin intermediate zone

5

muscles the depress the mandible INITIALLY

digastric
suprahyoid
opens the mouth
infrahyoid stabilizes the hyoid

6

move mandible lateral and forward to the right

left lateral and medial pterygoids

7

close jaw tightly

temporalis
masseter
medial pterygoid

8

approximates lips and compresses cheeks

buccinator

9

protrudes lower lip (pouting)

depressor labii inferior

10

draw corner of the outh down in a frown

depressor anguli oris and platysma

11

draws tip of chin upwards

mentalis

12

approximates and compresses lips

orbicularis oris

13

protrudes upper lip

zygomatic minor

14

lifts upper border of lip one side without raising lateral angle
snarl

levator anguli oris

15

raises lateral angle of the mouth into a smile

zygomaticus major

16

approximates lips and draws lips and corners lateral into a grimace

risorius

17

signs/symptoms of TMJ disorder

pt may c/o cephalgia, jaw problems, dull ache worse with chewing, tinnitus
difficulty opening mouth - click, crepitans
lateral deviation ofjaw
spasm within facial muscles
onset of TMJ may correspond with onset of stress
ear discomfort

18

types of TMJ dysfunction

opening click
closing click (reciprocal)
inability to fully open jaw (close-locked)
inability to close if TMJ symptoms are bilateral
creptius and grating
fusion of the joints (ankylosis)

19

causes of click

ALMOST ALWAYS D/T DISC DISPLACEMENT
also - adhesions, uncoordinated muscle action of pterygoids, tear or perforation fo disc, osteoarthritis, occlusion imbalances

20

etiology of TMJ SD

trauma - direct/whiplash/third molar extraction/intubation

21

direct blow to closed mouth === ____ injury

posterior capsule injury

22

maloclussions
a
2a
2b
3

1 - 1st molar normal, problem elsewhere for malocclusion
(crowded)
2a - lower 1st molar posterior to upper - RETRUSION
2b - lower 1st molar posterior to upper to great degree - GREATER RETRUSION - OVERBITE
3 - lower 1st molar anterior to upper mandibular protrusion - UNDERBITE

23

mood disorders assocaited with TMD

anxiety
depression
PTSD
history of abuse

24

endocrine causes of TMD

hypocalcemia
chvostek sign and trousseaussight

25

intracapsular causes of TMD

infection
RA
OA
gout
metastatic CA
articular disc displacements

26

extracapsular causes of TMD

myofascial pain of masticatory msucles
TMJD is NIH term for TMD

27

factors NOT associated with increased risk of TMD

genetics
orthodontics

28

epi of TMD

20% of americans affected
more common in young women
#2 cause of facial pain

29

patients with whta dz are more likely to develop TMD

RA
prevalence for TMD comorbidity 53-94%

30

OSE for TMD includes

cranial
C spine
scoliosis
leg length
innominate, sacrum, si