Flashcards in Temporomandibular Joint Deck (16):
What type of joint is the temporomandibular joint?
What is the classification for the temporomandibular joint?
Compound hinge and gliding joint
The temporomandibular joint is covered by what?
Fibrocartilage instead of hyaline
Fibrocartilage is more resistant to what?
Damage and can regenerate
What seperates an upper (above disc) from a lower (below disc) compartment?
What movement occurs in the upper compartment?
Protraction and retraction (gliding)
What movement occurs in the lower compartment?
Elevation and depression (hinge)
What bones are involved in the temporomandibular joint?
Condyle of Mandible
Articular eminence of temporal bone
What is the ROM for temporomandibular joint?
Side to side
What muscles are acting during elevation of the temporomandibular joint?
What muscles are acting during depression of TMJ?
What muscles are acting during protraction of TMJ?
Anterior part of temporalis
Superficial fibers of masseter
What muscles are acting during retraction of TMJ?
Posterior part of temporalis
Deep part of masseter
During side to side movement what muscles are being used in TMJ?
Pterygoids acting alternately
What part of the lateral pterygoid is partially inserted into the anterior portion of intra-articular disc?