tempromandibular joint Flashcards
(26 cards)
what type of joint is a tmj joint
synnovial bilateral joint made up of glidinga nd hinge movements
the tmj influences what
function esthetics and structural harmony of the face
what are the bones that form the tmj
mandubula and temporal joint
the mandibular condyle articulates with what of the temporal bone
mandibular condyle
mandibular fossa
articular tubercle
the upper compartment and lower compartment
of the articular surface is between what
disc and temporal bone
condyle and the disc
the sides of the tmj is strengthened by what ligament
collateral ligament and the lateral tempromandibular ligamrnt is the strongest
what are the two accessory ligament associated with the tmj
stylomandibular ligament
sphenomandibular ligament
What nerve innervates the tmj
trigeminal nerve
the affernt innervation of the tmj are what nerves
mandibular nerve and auriculo temporal nerve
addiitional nerve that innervates the tmj
deep temporal and maseteric
what are the four arteries that supply the tmj
superficial temporal
deep auricular
anterior tympanic
ascending pharyngeal
explain the translatory movement of the tmj
its in the superior part of the joint
it provides ant and inferior movement of the mandible
explain the hinge movement of the tmj
its in the inferior partof the tmj
it permits the opening of the mandible
what are the muscles of mastication
temporalis
masseter
pterygoideus lateralis
pterygoideus medialis
muscles for mandibular depression
digastricus
stylohyodieus
geniohyodieus
sternohyodieus
omohyoideus
what are the normal rom for tmj
mandibular depression-40-60
lateral deviation-8-12
protruction=8-12
retruction=3mm
a shift in the midline during the opening that dissapears with continued opening is what
deviation
a shift in the middle to one side that decomes greater with the opening and is maintained in that postion at maximum opening is what
deflection
in the ausculation of the tmj why does clicking occur
the incordinated movement of the condlar head and tmj disc
what are the differentaited clickings heard in the tmj
initial
intermediate
terminal
reciprocal
what is tmd=tempromandibular disroders and its characteristics
cluster of joint and muscle disorders in the orofacial area
xtreristiics
pain
joint sound
irregular jaw functions
signs and symptoms of tmd
jaw clicking
difficulty in opening the mouth
popping sounds in the ear
stiff or sore jaw muscles
with age change what happens to the condyles
thinning
thicker
flat
osteoporosis
with age changes what happes to the disc
becomes thinner
hyalinization and chondriod changes
