TMJ

Question 1

Three cardinal features of TMD

Answer 1

Orofacial pain, restricted jaw motion, and joint noise

Question 2

TMJ Joint

Answer 2

Synovial, condylar, modified ovoid, and hinge-type joint

Fibrocartilage, not hylaine

Question 3

Upper cavity of TMJ

Lower cavity of TMJ

Answer 3

Gliding, translation, or sliding

Rotation or hinge

Question 4

Rotation occurs

Answer 4

From beginning to midrange of movement

Question 5

Gliding

Answer 5

Second movement

Translation

Question 6

Both gliding and rotation are essential for

Answer 6

Opening and closing of mouth

Question 7

TMJ resting position

Closed pack

Capsular pattern

Answer 7

Mouth slightly open, lips together, teeth not in contact

Teeth tightly clenched

Limitation of mouth opening

Question 8

Central occlusion

Answer 8

Relation of joint and teeth where maximum contact of teeth (POSITIONED ASSUMED DURING SWALLOWING)

Question 9

Median occlusal position

Answer 9

Teeth fully interdigiated

Question 10

TMJ movement

Answer 10

Actively displace only anterior and slightly lateral

Question 11

As mandible moves forward, disc moves

Answer 11

Medially and posteriorly

Question 12

First phase

Second phase

Answer 12

mainly rotation (primarily inferior joint space)

Mandible and disc move together (translation primarily in superior joint space)

Question 13

Skeleton of tongue

Answer 13

Hyoid bone: serves as attachment for extrinsic tongue muscles and infrahyoid muscles

Provides reciprocal stabilization during swallowing and can affect cervical/shoulder function

Question 14

TMJ joints innervation

Answer 14

Branches of auriculotemperal and masseteric branches of mandibular nerve

DISC is aneural and avascular in intermediate force bearing zone

Question 15

Temporal mandibular ligament

Answer 15

Restrains movement of lower jaw and prevents compression of tissues

Question 16

Sphenomandibular ligament

Answer 16

Guiding restraints to keep condyle, disc, an temporal bone firmly opposed

Question 17

Pain in fully opened position

Biting pain

Answer 17

Extra-articular problem

Intra

Question 18

Limited opening

Answer 18

Disc displacement anterior, inert tissue tightness, muscle spasm

Question 19

Early clicking

Late clicking

Answer 19

Developing dysfunction

Chronic problem

Question 20

stage 1

stage 2

Answer 20

Disc anterior and medial
Inconsistent click, mild or no pain

Disc anterior and medial
Reciprocal click (early opening, late closing)
Severe consistent pain

Question 21

Stage 3

Answer 21

Reciprocal consistent click present (later on opening, early closing

MOST PAINFUL STAGE

Question 22

Closed lock

Open lock

Answer 22

Closed: dislocation

Open: subluxation