Dh--Oral Biology-Temporomandibular Joint

Front 1

Cracking Sound

Back 1

Crepitus

Front 2

Myofacial pain and dysfunction

Back 2

MPD

Front 3

Temporomandibular disorder

Back 3

TMD

Front 4

Temporomandibular Joint

Back 4

TMJ

Front 5

Articulation between the condyle of the mandible and the glenoid fossa of the temporal bone. Highly Specialized Joint

Back 5

Temporomandibular Joint

Front 6

TRUE or FALSE
TMJ differs from other joints because of fibrocartilage covers the bony articulating surfaces, its rotational and transitional movement and its dependence on contralateral joint

Back 6

TRUE

Front 7

Where is the articulating disk interposed?

Back 7

between the temporal bone and the mandible

Front 8

What does the disk divide?

Back 8

The superior joint space and the inferior joint space

Front 9

What type of movement occur in superior joint space?

Back 9

Translational Movement

Front 10

What type of movement does inferior joint space function in?

Back 10

Rotational movement

Front 11

What type of fluid do both the superior and inferior spaces contain?

Back 11

Synovial Fluid

Front 12

This fluid provides nourishment and lubrication to avascular structures.

Back 12

Synovial Fluid

Front 13

What surfaces are avascular?

Back 13

Disk and Bony

Front 14

What are the Elevator Muscles?

Back 14

Masseter, temporalis, and medial pterygoid

Front 15

What are the Closer Muscles?

Back 15

Mostly Lateral Pterygoid

Front 16

What percentage of the population has significant TMD related jaw pain or dysfunction?

Back 16

5%

Front 17

There are 4 Causes of TMJ Disorder what are they?

Back 17

1. Direct Trauma
2. Indirect Trauma
3. Parafunctional habits (clenching, bruxism)
4. Misc.

Front 18

What makes up the Misc. category of the causes of TMJ disorder?

Back 18

Dentofacial deformities, psychosocial factors, systemic disease (Oa, RA), result of condylar hypoplasia or hyperplasia, iatrogenic causes, corticosteriod injection of joint indiscriminately.

Front 19

TRUE or FALSE
TMJ disorders can also be caused by disorders of the mastication muscles or internal derangement of the joing components.

Back 19

TRUE

Front 20

What history may be associated with TMJ disorders?

Back 20

Joint Sx, Pain, Mastication problems, Trismus, Malocclusion, Parafunctional Habits, Denta sxs, Hx of extensive dental/ortho tx, Hx of surgical tx of jaws, progession of sxs, precipitatin events (mastication, 3rds out, yawning)

Front 21

Crepitus occurs in what percent of asymptmatic patients?

Back 21

33%

Front 22

What would you examine for TMJ disorder?

Back 22

Muscles of Masitcation; Joint; Cervical Spine; Oral Cavity; Auscultation; Moce mandible in normal rotation, right and left later excursion; Interincisal opening, checking for deviation; Protrusive and retrusive.

Front 23

TRUE or FALSE
Radiographic studies helpful in determining cause of pain and dysfunction

Back 23

TRUE

Front 24

TRUE or FALSE
Panoramic, transcranial imaging for identifying gross bone changes.

Back 24

TRUE

Front 25

Tomography assesses condylar position and range of mobility

Back 25

TRUE

Front 26

This comprimises 50% of all TMD. Characterized by Dysfunctional muscle hyperactivity with regional pain, tenderness of affected muscles, reduced opening, and complaints of malocclusion.

Back 26

Myofacial Pain and Dysfunction

Front 27

Jaw locking, jaw deflection, restricted excursive movements

Back 27

Disk displacement

Front 28

Immobility because of fibrous or bony union between the articulating structures of the joint

Back 28

Ankylosis

Front 29

Dislocation and subluxation

Back 29

Hypermobility

Front 30

Degenerative Joint disease. Degenerative changes of articular cartilage with associated remodeling. Pain worse in the evening, limited opening, crepitus

Back 30

Osteo Arthritis

Front 31

50-75% have TMJ involvement. Pain worse int he morning, limited opening, occlusal changes, edema, tenderness

Back 31

Rheumatoid Arthritis

Front 32

What are some non-surgical treatments to help with TMJ Disorders?

Back 32

Phamagologic Therapy (muscle relaxants, botulism toxin, anti-anxiety agents to reduce hypertonicity); moist heat; PT; Soft Diet; Jaw Stretching; Coordination exercises; Occlusal Adjustment, ortho therapy

Front 33

What is the goal of non-surgical treatment in TMJ disorders?

Back 33

To improve function (range of motion) and reduce pain.

Front 34

What is the second phase in treatment of TMJ disorders?

Back 34

Occlusal Appliances

Front 35

They relax muscles, protect dentition, stabalize and protect joint, relieve the load on the disk.

Back 35

Occlusal Appliances

Front 36

TRUE or FALSE
Botox is used to treat severe bruxism to provide muscle relaxation and reduce muscle inflammation of Masseter muscle and TMJ capsule.

Back 36

TRUE

Front 37

Rare. 6-8% of osteosarcomas start in the jaw

Back 37

Tumors