Intro & Anatomy Flashcards
is a ginglymoarthrodial joint
with hinging or rotation movements in one plane
(ginglymoid joint) & gliding or translation movements
in another plane (arthrodial joint)
The TMJ
_____ contains
the synovial f luid, limits its
motion and maintains the
relationship between the joint
components.
A fibrous capsule
transports nutrients to & waste
products from the articular surfaces & lubricates joint
Synovial f luid(synovia)
What are the 3 Functions of Disc?
- Distributes loading forces
- Decreases wear
- Stabilizes condylar movement
- Articular portion is composed of dense fibrous
connective tissue NOT cartilage - Has some ability to repair itself
- Is devoid of nerves or blood vessels in the
intermediate zone which articulates with the
superior aspect of the condyle - The posterior attachment of the disc is highly
vascularized and innervated
Disc
What is the most innervated and vascular portion of the articular disc?
Posterior/ retrodiscal tissue
The articulating surfaces are lined with dense
______ which
allows for a greater ability to heal
fibrocartilage
A thin layer of cartilage covers the articulating surface
of the bones.
Plays an important role as a stress absorber during
function.
Research suggests that compressive loading is highest
in the anteromedial region of the condyle (1).
Composed of cells and extracellular matrix (i.e.
collagens & proteoglycans).
Articular Cartilage
____ ligaments
Allow the disc to move in anterior-posterior direction
during condylar translation.
Discal ligaments may become inf lamed & painful
because they are vascularized and innervated.
Discal ligaments
_____ ligaments
Attach the disc to the condyle on the medial & lateral
surfaces
Allow the disc to rotate on the condyle during condylar
translation.
Caspular ligaments
____ ligaments (2)
Limits inferior movement
of mandible
Sphenomandibular and Sytlomandibular ligaments
What are the 2 arteries that supply TMJ?
Superficial temporal and maxillary arteries
What 2 nerves innervate the TMJ?
Auriculotemporal V3 and Masseteric nerves
_____ occurs
between inferior
disc surface and
condyle
Rotation
_____ occurs
between the superior
disc surface and fossa
Translation
