Tmj Flashcards
What type of joint is the TMJ joint
Synovial, condyloid and hinge, diarthrosis, uniaxial
What are the articular surfaces of the TMJ joint
Convex condyles of the mandible
and
the concave mandible fossa
and
the convex articular eminence of the temporal bone
TMJ accessory ligaments
Fibrous joint capsule (medial and lateral collateral ligaments)
Temporomandibular ligament
Stylomandibular ligament
Sphenomandibular ligament
Fibrocartiliginous articular disc (that divides the two cavities)
TMJ movements
Depression
Elevation
Lateral deviation
Protraction
Retraction
TMJ joint
Upper joint =
Lower joint =
Upper joint = (translation) PLANE Gliding
Lower joint = HINGE (ginglymus)
TMJ articular surface contains
ARTICULAR DISC
ARTICULAR TUBERCLE
MANDIBULAR FOSSA
MANDIBULAR CONDYLE
TMJ articulation
CONVEX CONDYLES OF THE MANDIBLE
CONCAVE MANDIBULAR FOSSA ON TEMPORAL BONE
TMJ ligaments
FIBROUS CAPSULE (medial and lateral collateral ligaments)
TEMPOMANDIBULAR LIGAMENT
TMJ accessory ligaments
STYLOMANDIBULAR LIGAMENT
SPHENOMANDIBULAR LIGAMENT
The joint capsul and all ligaments limit motion of the mandible,
Especially ___________ and __________
Depression and retraction
Protrusion is limited by_____________ ligament
Stylomandibular
Temporalis movement
(Strongest) closes the job and moves the jaw backwards)
Medial pterygoid
Closes the jaw- elevation and protraction of the mandible
Lateral PTERYGOID movements
Opens the jaw, protraction of the mandible
Masseter movements
Closes the jaw, elevates mandible during chewing and clenches teeth
