TMJ Flashcards
TMJ ligament
OI: neck of mandible to zygoma
A: prevent post/inf displacement
strongest ligament
Sphenomandibular ligament
from Meckel’s cartilage
sphenoid spine to lingua of mandible
Stylomandibular ligmant
from styloid process to mandibular angle
movement of the upper compartment
translation
movement of the lower compartment
rotation
vascular region
bilaminar zone
innervation
auriculotemporal
n to masseter
post. deep temporal n
What n supplies pain sensation from the capsule and disc?
auriculotemporal
What type of joint is the TMJ?
synovial joint
diarthrosis
What type of cartilage is in the TMJ?
dense fibrous CT (fibrocartilage)
What a supply the TMJ?
sup temporal
deep auricular
ant tympanic
ascending pharyngeal
What does the intrinsic TMJ ligamanet do?
prevent post/inf displacement
What 2 extrinsic ligaments stabilize the TMJ?
sphenomandibular
stylomandibular
Describe the articulating disc
biconcave
avascular
divides upper/lower compartment
what is located in the upper compartment?
articular eminence
mandibular fossa and disc
what is located in the lower compartment?
condyle and disc
what zone of the articulating disc are thin/thick?
thin: intermediate
thick: post > ant
What forces would be applied to reduce a luxated TMJ?
inf/post
TMJ disc displacement most commonly occurs
anteriomedially
S/S of ant disc displacement
clicking upon opening/closing
what the the region of the TMJ disc that has the most dense organized elastic fibers?
post-supeior lamina of bilaminar zone
