TMJ

Question 1

Joint capsule tissue type

Answer 1

Fibrous connective tissue

Question 2

TMJ superior capsule attachment

Answer 2

Rim of temporal articular surface

Question 3

TMJ inferior capsule attachment

Answer 3

Condylar neck

Question 4

Where are medial and lateral attachments present?

Answer 4

Only in inferior joint space to medial and lateral poles

Question 5

What does the lateral capsule become?

Answer 5

TMJ ligament

Question 6

Anterior capsule blends with ____ and ____

Answer 6

Lower head of external pterygoid and anterior disc

Question 7

Where does the posterior capsule attach near?

Answer 7

Post glenoid spine

Question 8

Lateral ligament prevents what?

Answer 8

excessive A-P and lateral movements

Question 9

Besides preventing specific movements, what else is the lateral ligament responsible for?

Answer 9

It is the main suspension ligament during moderate opening

Question 10

Temporomandibular ligament

Answer 10

outer oblique
inner horizontal

Question 11

Stylomandibular ligament

Answer 11

extracapsular
styloid process of temporal bone to posterior aspect of mandible

Question 12

Stylomandibular ligament prevents what?

Answer 12

Extreme opening

Question 13

Sphenomandibular ligament

Answer 13

extracapsular ligament
superior attachment

Question 14

Sphenomandibular ligament responsibilities

Answer 14

Suspends mandible during wide opening
Limits inferior displacement

Question 15

Medial ligaments

Answer 15

Sphenomandibular
Stylomandibular

Question 16

Medial/Lateral Disc attachments

Answer 16

medial and lateral poles by medial and lateral collateral ligaments

Question 17

Posterior superior disc attachment

Answer 17

Superior lamina/stratum

Question 18

Posterior inferior disc attachment

Answer 18

Inferior lamina/stratum

Question 19

Anterior disc attachment

Answer 19

Capsule and superior fibers of the superior lateral pterygoids

Question 20

What is a source of TMJ pain and why?

Answer 20

The retrodiscal laminae (sup. & inf.)
getting pinched, pushed anteriorly

Question 21

Articular Disc Structure

Answer 21

fibrocartilagenous

Question 22

Vascular and neural structure of the articular disc

Answer 22

aneural and avascular

Question 23

Function of the articular disc

Answer 23

shock absorber
improves congruency of joint surfaces

Question 24

Attachments of articular disk

Answer 24

Capsule-A&P
Condyle-M&L via the M&L CLs

Question 25

Retrodiscal laminae attachments

Answer 25

Anterior tympanic plate Posterior capsule

Question 26

Retrodiscal laminae function

Answer 26

keeps disc from moving too far anteriorly

Question 27

Superior belly of lateral pterygoid attachment

Answer 27

Anterior to disc

Question 28

Superior belly of lateral pterygoid function

Answer 28

control posterior movement when closing mouth (eccentrically controls disk)

Question 29

Upper compartment location

Answer 29

between disk and mandibular fossa of temporal bone

Question 30

Lower compartment location

Answer 30

between disk and condyle of mandible

Question 31

Opening/Closing of mouth movement

Answer 31

Depression/Elevation

Question 32

Opening/Closing of mouth plane and axis

Answer 32

sagittal plane coronal axis through condyles

Question 33

Phases of Opening/Closing of mouth

Answer 33

Phase 1 Early Phase 2 Late

Question 34

Opening of mouth movements

Answer 34

Phase 1: Rotation (LC) Phase 2: Translation (UC)

Question 35

Phase 1 of mouth opening

Answer 35

Lower compartment rolls posteriorly and glides anteriorly

Question 36

Phase 2 of mouth opening

Answer 36

Upper compartment translates anteriorly

Question 37

Explain what happens during closing of the mouth

Answer 37

Phases are reversed Posterior translation of upper compartment first Anterior roll and posterior glide of lower compartment

Question 38

Opening Phase 1 measurements

Answer 38

First 11-25 mm

Question 39

Total excursion of movement

Answer 39

40-55 mm

Question 40

Mandibular Protrusion and Retrusion Plane

Answer 40

Translational Sagittal Plane

Question 41

Mandibular Protrusion and Retrusion Plane Compartment

Answer 41

Upper

Question 42

Protrusion distance

Answer 42

6-9 mm

Question 43

Retrusion distance

Answer 43

3 mm

Question 44

Mandibular Lateral Deviation planes of movement

Answer 44

Primary & Secondary Occur at the same time

Question 45

Mandibular Lateral Deviation (Primary)

Answer 45

Ipsilateral condyle spins in transverse plane about the vertical axis Contralateral condyle translates anteriorly

Question 46

Mandibular Lateral Deviation (Secondary)

Answer 46

Ipsilateral condyle spins in the frontal plane about the sagittal axis Contralateral condyle is displaced/distracted inferiorly

Question 47

Mandibular Lateral Deviation Excursion

Answer 47

8-11 mm