TMJ Part 2

Question 1

Phase I

Answer 1

Rotation
Lower Compartment

Question 2

Phase II

Answer 2

translation
Upper compartment

Question 3

Phase II Opening

Answer 3

Translate anteriorly

Question 4

Phase II Closing

Answer 4

translate posteriorly

Question 5

opening combines movements
closing ____

Answer 5

reverses

Question 6

Phase I opening

Answer 6

rotation of condyle in lower compartment
first 11-25 mm

Question 7

Phase II Opening

Answer 7

anterior translation of disk/condyle together in upper compartment

Question 8

Total excursion

Answer 8

40-50 mm

Question 9

Closing or elevation occurs in reverse pattern as opening

Answer 9

Translate posteriorly

Roll anteriorly, glide posteriorly

Question 10

At the end of this phase (I) the disc is more

Answer 10

Posteriorly rotated position in relation to condyle

Question 11

Superior striatum becomes tight as the condyle and disc

Answer 11

Translate anterior

Question 12

Disc is affected by its own self seating, disc is rotated further

Answer 12

Posteriorly on condyle

Question 13

Mandibular Protrusion and Retrusion
Occur in the

Answer 13

upper compartment

Question 14

Protrusion

Answer 14

mandible juts forward
6-9 mm

Question 15

Retrusion

Answer 15

mandible pulls back
3 mm

Question 16

Lateral deviation primary

Answer 16

Ipsilateral condyle spins in transverse plane
Contralateral condyle translates anteriorly

Question 17

Lateral Deviation Secondary

Answer 17

Ipsilateral condyle spins In the frontal plane about an A-P axis
Contralateral condyle is Displaced inferiorly

Question 18

Lateral deviation range is

Answer 18

8-11 mm

Question 19

Issue with lateral deviation, PT should focus on side

Answer 19

contralateral to movement issue

Question 20

Chewing and Grinding

Answer 20

Combo of all motions at the TMJ

Question 21

Mandibular Depressors

Answer 21

Gravity
Suprahyoids (anterior/post digastric)
Inferior lateral pterygoid

Question 22

Inferior lateral pterygoid

Answer 22

Forward translation/protrusion of mandibular condyle in phase II

Question 23

Mandibular Elevators (Closing)

Answer 23

Temporalis
Masseter
Medial Pterygoid
Superior lateral pterygoid

Question 24

masseter and medial Pterygoid create a

Answer 24

sling for the TMJ and work synergistically to close

Question 25

Superior lateral pterygoid plays roles by Keeping disk

Answer 25

slightly forward during closing

Question 26

- Right Lateral Deviators

Answer 26

Left Medial and Lateral Pterygoids Right Posterior Temporalis

Question 27

- Left Lateral Deviators

Answer 27

Right Medial/Lateral Pterygoids Left Posterior Temporalis

Question 28

Protruders

Answer 28

Bilateral inferior Pterygoids assist by medial pterygoids

Question 29

Retruders

Answer 29

Posterior Temporalis Posterior Digastric Deep masseter

Question 30

Roles of Muscles while chewing Maintain appropriate alignment between

Answer 30

Disc and mandibular condyle

Question 31

- High bite resistance between molars (halls cough drop)

Answer 31

reduces pressure ipsilaterally compress contralaterally

Question 32

Strong concentric contraction moves disc

Answer 32

anteriorly

Question 33

Low bit resistance between molars (grape) Disc in relatively ideal position between

Answer 33

Condyles and articular eminence

Question 34

Face and skull grow rapidly during

Answer 34

first 6 years

Question 35

Dimensions of face, including the mandible

Answer 35

Grow more rapidly than those of skull most pronounced in ramus

Question 36

During growth and development, mandibular angle decreases from

Answer 36

140-110

Question 37

Postural forces and actual function of the TMJs will affect development of the

Answer 37

Dentofacial structures

Question 38

Cervical muscle weakness > subsequent forward head posture, creating

Answer 38

anterior open back Lengthening of lower part of face and increased Mandibular angle

Question 39

Lack of dental force equilibrium and alignment >

Answer 39

Change shape of maxilla and mandible and TMJ function

Question 40

Forward head posture creates passive tension in selected

Answer 40

Suprahyoid and infrahyoid muscles, altering the Resting posture of mandible

Question 41

Effects of Forward Head Posture on Hyoid Bone and its Attachments Mandible is pulled

Answer 41

Posteriorly and inferiorly, changing the position of the Condyle within the TMJ