TMJ (p. 293)

Question 1

What is the TMJ?

Answer 1

Temporomandibular joint. Articulation between the temporal bone and the mandible.

Question 2

How is the TMJ formed?

Answer 2

Mandibular condyle fits into the mandibular fossa of the temporal bone.

Question 3

What is the articular disc?

Answer 3

A small fibrous pad of dense collagen tissue. Devoid of any blood vessels or nerve fibers.

Question 4

Where is the articular disc found?

Answer 4

Between the mandibular condyle and the mandibular fossa of the temporal bone.

Question 5

What is the function of the articular disc?

Answer 5

Nonossified bone that permits the complex movement of this joint

Question 6

What kind of joint is the TMJ?

Answer 6

Bilateral synovial joint

Question 7

What are the articulating surfaces of the TMJ?

Answer 7

Temporal bone and mandible

Question 8

The TMJ is actually…

Answer 8

Two joints that function as one.

Question 9

Where is the mandible fused? Why?

Answer 9

At the midline, so the left and right joints are interrelated in their movements

Question 10

What are the parts that make up the mandible?

Answer 10

3 bony parts:

1. Mandibular/glenoid fossa
2. Condyloid process
3. Articular eminence