TMJ and Muscles of Mastication

Question 1

3 Major components of TMJ anatomy are …

Answer 1

1. Mandibular condyle
2. Articular Fossa and Eminence (of temporal bone)
3. Articular disc

Question 2

In what directions does the mandibular condyle have the greatest dimension?

Answer 2

Greatest dimension is mediolateral for the mandibular condyle

Question 3

Articular ____ is the nonfunctioning portion of TMJ, and Articular ________ is the functioning portion of TMJ

Answer 3

Articular Fossa is the Nonfunctioning portion of TMJ, and Articular Eminence is the functioning portion of the TMJ

Question 4

When we say TMJ, how many are we referring to?

Answer 4

two

Question 5

Where is the articular disc located?

Answer 5

Articular disc is between the mandibular condyle and the articular fossa/eminence

Question 6

What is the movement(s) of the mandible?

Answer 6

Mandible glides and rotates

Question 7

Articular disc ensures maximal _________

Answer 7

Maximal intercupation is ensured by articular disc

Question 8

Articular disc acts as a _________ between two bones

Answer 8

Articular disc acts as a SHOCK ABSORBER between 2 bones

Question 9

What kind of joint is the TMJ?

Answer 9

TMJ = synovial joint

Question 10

What are the functions of the ligaments of the TMJ?

Answer 10

Ligaments of TMJ 1. SUPPORT the joint, and 2. LIMIT movement (prevent stretching too far)

Question 11

T/F: Ligaments of TMJ are elastic bands that move the joint

Answer 11

FALSE, although ligaments are elastic band….they DO NOT move the joint