The flashcards below were created by user Brittanyellis on FreezingBlue Flashcards.

  1. What joints form the TMJ?
    • Hinge joint: for opening and closing- elevation and depression
    • Gliding joint: protractions- anterior directions and retraction- posterior directions
  2. What is the difference between the TMJ and other joints?
    • 1. Fibrocartilage- to withstand heavy duty
    • 2. Articular disc-compenstates for bone shape
    • 3. Bilateral joint- both sides at same time
  3. Coranoid process
    Is an attachment (shark fin- flat and pointy). The articulation of the mandible: smooth articulating surface.
  4. Joint capsule
    • Thick, fibrous capsule that surrounds the joint
    • Wraps superiorly around the articular eminence and fossa
    • Wraps inferiorly around the neck and head of the condyle.
  5. Articular joint disc
    • Sometimes called meniscus¬†
    • Located between the temporal bone and condyle
    • Attached to lateral and medial pole of condole
    • Conforms to the shape of the adjacent articulating bones.
    • Divides TMJ into two spaces- upper and lower synovial cavities
  6. Joint Cavities
    • Joint disc divides the synovial cavity into upper and lower joint cavities
    • Synovial membrane (lining of cavities) secretes synovial fluid to: lubricate cavity, nutritive functions for articular cartilage, and is a shock absorber.
  7. Supporting soft tissues: TMG ligaments
    • 1) TMJ ligament- located on lateral side of joint; reinforces joint capsule; runs from zygomatic arch (anterior to joint capsule) and inserts into posterior surface of rams below condyle; prevents excessive retraction (backwards movement)
    • 2) Sphenomandibular ligament- located on the medial side of the mandible; runs from spine of sphenoid to lingua of mandible near mandible foramen; during protrusion (forward movement), ligament becomes taut.
    • 3) Stylomandibular ligament- located on the posterior aspects of the mandible; runs from styloid process to angle of mandible; during protrusion (forward movement), ligament becomes taut.
Card Set:
2017-06-21 10:50:57

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