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Flashcards in TMJ Deck (19):
1

TMJ ROM

Full opening: 40-60mmLateral deviation: 8-12mmProtrusion: 3-6mm

2

To which surface of the joint is the disc more attached to?

Convex surface of the mandibular condyle

3

What are the disc's medial/lateral attachments?

Medial collateral ligaments and lateral collateral ligaments connect the disc to the medial and lateral poles of the condyle

4

What are the disc's posterior attachments?

The disc is continuous with the posterior attachment

5

What are the disc's anterior attachments?

The disc is attached to the joint capsule and the superior lateral pterygoid

6

What type of joint is the TMJ and what motions does it do?

Modified hinge; Anterior gliding and hinge-like rotation

7

What are the two phases of mouth opening?

Phase 1: First 10-15mm, rotation occurs in this phase.Phase 2: After 15mm, the head of the mandible and the articular disc glide anteriorly.

8

What is functional opening?

About 40mm

9

What muscles contribute to mouth closing?

TemporalisMasseterMedial pterygoid

10

What muscles contribute to protrusion?

Medial pterygoidLateral pterygoid

11

What muscles contribute to retrusion?

Posterior fibers of temporalis

12

What muscles contribute to mouth opening?

Lateral ptyergoid
Digastric
Stylohyoid
However, gravity does most of the work here.

13

TMJ joint noises and what they might mean

Clicking: disc dysfunction and/or hyper mobility
Grinding: arthritis

14

3 diagnostic categories

Joint abnormalities
Congenital structure abnormalities
Idiopathic loss of functional mobility

15

Synovitis and capsulitis s/sx

Pain in the pre auricular area
Unable to close back teeth together
Openning

16

TMJ hypermobility s/sx

"my jaw feels like it's going out of place"
Joint noises
Joint catching while in the open position
Mandibular depression >40mm and deviation toward the noninvolved side
Palpable irregularities with closing

17

Disc displacement with reduction s/sx

Popping and clicking with mouth opening and closing
Reciprocal click

18

Disc displacement without reduction s/sx

Intermittent locking w/o joint noises
Opening limited to 20-25mm with deflection toward involved side
Limited lateral excursion toward the contralateral side

19

Treatments for TMJ dysfunction

Postural reeducation
Modalities for pain
Inflammation reduction
Biofeedback
Joint mobs
AROM and muscle strengthening
Edu re: eating soft foods, decreasing habits that stress the TMJ, maintaining the rest position of the tongue