Temporomandibular Joint Flashcards
where do the mandibular condyles sit?
in the mandibular fossa
what structures are anterior and posterior to the mandibular fossa?
articular eminence anteriorly
postglenoid tubercle posteriorly
what is a feature of the mandibular fossa?
it is thin bone
what structure has high forces when biting?
articular eminence
what kind of cartilage does the articular eminence contain?
fibrocartilage
where is most of the pressure directed to in the TMJ?
articular eminence
where can the posterior aspect of the mandibular condyle be felt?
in the external meatus
the articular surface of the mandible is considered congruent/incongruent
incongruent
mandible is concave or convex?
convex
is the articular eminence concave or convex?
convex
where should you put your fingers to palpate the TMJ?
tragus
what does the inferior TMJ consist of?
mandibular condyle and inferior surface of disc
what does the superior TMJ consist of?
articular eminence and superior surface of disc?
what is the classification of the inferior TMJ?
hinge
what is the classification of the superior TMJ?
gliding
when do you get the anterior translation of the joint?
open mouth wider
what CAN’T the articular disc do?
repair and remodel
what does the anterior joint capsule restrict?
posterior translation
what does the inferior lamina of the bilaminar retrodiscal pad limit?
forward translation of the mandible
where is the joint capsule the most strong?
most dislocated in which direction?
laterally
anterior
what movements do the temporomandibular ligament limit?
downward translation, posterior translation, and rotation during mandibular depression
what movements do the stylomandibular ligament limit?
protrusion
what movements do the sphenomandibular ligament limit?
anterior translation
what gliding kinematics can occur?
anterior and lateral glide
