Ch. 29

Question 1

Temperomandibular Joint (TMJ)

Answer 1

This is bilateral and is the articulation between the temporal bone and the mandible.

Question 2

Articular Disc

Answer 2

Fibrous pad of dense collagen tissue that sits between the condyle head and the glenoid fossa

Question 3

• Thickest in Posterior-Posterior Band
• Thinner in Middle-Intermediate Zone
• Thicker In anterior-Anterior Band

Answer 3

Articular Disc

Question 4

Synovial Cavities

Answer 4

Is above/below Disc.

-It secretes synovial fluid for lubrication

Question 5

Where is the entire joint surrounded by a fibrous capsule?

Answer 5

Synovial Cavities

Question 6

What prevents the condyle from being displaced?

Answer 6

Temperomandibular Ligament

Question 7

Retrodiscal Pad

Answer 7

Area posterior to the Disc

-retrodiscal tissues are present (Ex. Loose CT, Nerves, Blood Supply)

Question 8

What is TMJ referred to as ?

Answer 8

The Hinge and Sliding Joint

Question 9

2 movements of the TMJ:

Hinge and sliding Joint

Answer 9

• Rotational

* Gliding

Question 10

Sensory messages apparently from TMJ that are actually traveling to the brain from other regions

Answer 10

Referred pain

Question 11

Which portion of the Disc is NOT innervated?

Answer 11

Central Portion

Question 12

What do popping and clicking sounds mean?

Answer 12

Disc displacement

Question 13

What does it mean when you hear a grinding sound?

Answer 13

• Adhesions In synovial Cavities
• Arthritis
• Disc Perforations

Question 14

Subluxation

Answer 14

Dislocation of the mandible

Question 15

Manual manipulation back into place

Answer 15

Subluxation

Question 16

3 Causes of Subluxation:

Answer 16

• Depth of glenoid fossa
• Height of the articular eminence
• Position of capsule around Joint

Question 17

Bruxism

Answer 17

Grinding of teeth

-usually occurs at night

Question 18

Arthritis is a possibility in this joint

Answer 18

Subluxation