5] Examination Of TMJ

Question 1

Strongest muscle in the body

Answer 1

Masseter

Question 2

Headache or facial pain associated with
disorder of the cranium, neck, eyes, ears,
nose, sinuses, teeth, mouth, or other facial structures

Answer 2

TMD

Question 3

Disc attaches to the condyle how?

Answer 3

Via medial and lateral collateral ligs

Question 4

Joint structure of the capsule

Answer 4

Highly innervated and vascularized

Question 5

3 ligaments

Answer 5

Temporomandibular
Sphenomandib
Stylomandib

Question 6

Innervation

Answer 6

Trigeminal nerve

Trigeminal-cervical complex

Question 7

Action of temporalis

Answer 7

Elevation

Ipsi deviation

Question 8

Action of masseter

Answer 8

Elevation

Question 9

Action of medial pterygoid

Answer 9

Elevation
Contra deviation
Protrusion

Question 10

Action of lateral pterygoid

Answer 10

Depression
Protrusion
Contra deviation

Question 11

Action of supra hyoids

Answer 11

Depression and swallowing

Question 12

Action of infrahyoids

Answer 12

Swallowing

Question 13

How much mandible depression is normal?

Answer 13

40-50 mm

Question 14

How much mandibular depression is functional?

Answer 14

30 mm

Question 15

2 phases of mandibular depression

Answer 15

Anterior rotation of the condyle accounts for the first 11-25mm of opening
• Translation of the disc/condyle complex accounts for the remainder of opening

Question 16

Controlled by the digastrics, inferior head of the lateral pterygoid, and gravity

Answer 16

Mandibular depression (opening)

Question 17

Controlled by the temporalis, masseter, medial pterygoid, and superior head of the lateral
pterygoid muscle

Answer 17

Mandibular elevation (closing)

Question 18

Superior/posterior translation of upper joint

followed by rotation of the condyle below the disc in the lower joint

Answer 18

Mandibular elevation (closing)

Question 19

How much protrusion is normal

Answer 19

5-10 mm

Question 20

Protrusion is controlled by

Answer 20

bilateral action of the masseter,

medial pterygoid, and lateral pterygoid muscles

Question 21

Retrusion is done by

Answer 21

deep masseter, posterior

temporalis, diagstric & suprahyoid muscles

Question 22

How much lateral deviation is normal?

Answer 22

8-12 mm

Question 23

Lateral deviation is done by

Answer 23

lateral pterygoids and ipsilateral temporalis

Question 24

What type of joint is TMJ

Answer 24

Synovial

Question 25

Reduction is when there is

Answer 25

Clicking

Question 26

What is resting occlusion

Answer 26

The manner in which the upper and lower teeth come together

Question 27

• Jaw clenching/grinding is linked to increased
masticatory muscle activation & pain,
increased cervical and trunk muscle activation

Answer 27

Bruxism

Question 28

Explain active disc reposition technique

Answer 28

Movement:

1. Lateral deviation to contralateral to side of displacement
2. Maximal mandibular depression
3. Mandibular elevation while maintaining lateral deviation
4. Slow return to resting occlusion

Question 29

Rocobado 6 x 6

Answer 29

• Mandibular rest position
• Controlled mandibular rotation
• Rhythmic stabilization
• Cervical joint liberation
• Axial extension
• Shoulder girdle retraction

Question 30

Normal mandibular opening

Answer 30

35-50 mm

25-35 functional