TMJ Clinical Signs Flashcards
what muscle pulls the disc forward during mouth closure
lateral pterygoid
what are the two functions of the disc
separates the joint cavity into two functional components
force dispersion
what does the upper joint do
plane gliding joint for translation of mandible condyles
what does the lower joint do
hinge joint, permits rotation of condyles
function of the retrodiscal laminae
stabilize the disk
prevent excessive translation of the disc over the condyle
with anterior dislocation of the disc, laminae may be approximated btw mandibular condyle and mandubular fossa
what does the tempromandibular ligament do
helps prevent posterior dislocation of the joint
prevents medial slippage of disc
counter lateral pterygoid pull
what muscles elevate the jaw
temporalis
masseter
medial pterygoid
lateral pterygoid
what muscles depress the jaw
the suprahyoid and infrahyoids
what are the categories of TMD
myofacial
disc displacement
degenerative/inflammatory
mechanism for masticatory muscle disorders
strain
overuse injury
centrally mediated pain
what can masticatory muscle disorders result in
reduced motion and alter occlusion
trigger points with pain referral to face, teeth, auricular area, temporal, periocular & upper cervical
masticatory muscle disorders physical exam results
tender muscles
limited ROM - pain at end range
pain with resistance testing
pain with tongue depressor biting on ipsi side
what is seen with joint dysfunction
preauricular pain
painful palpation at joint line
pain w compressive loads
disc displacement with reduction
audible clicking and/or palpable clicking
motion intact
disc displacement without reduction
catching sensation with opening/closing
limitations in opening ROM
