TMJ and occlusion

Question 1

What muscles open the mouth?

Answer 1

Lateral pterygoid

Geniohyoid
Mylohyoid
ABG

Question 2

What muscles close the mouth?

Answer 2

Masseter
Temporalis
Medial pterygoid

Question 3

What muscles are involved in protrusion?

Answer 3

Masseter
Medial pterygoid
Lateral pterygoid

Question 4

What muscles are involved in retrusion?

Answer 4

Temporalis
Geniohyoid
ABG

Question 5

What muscles are involved in lateral excursion?

Answer 5

Lateral pterygoid
Medial pterygoid

Question 6

What muscles are involved in lateral movement?

Answer 6

Masseter
Temporalis

Question 7

What innervates the MOM?

Answer 7

Vc

Question 8

What innervates masseter?

Answer 8

Masseteric nerve

Question 9

What innervates Temporalis?

Answer 9

Deep temporal nerve

Question 10

What innervates the pterygoids?

Answer 10

Nerve to m. Pterygoid
Nerve to l. Pterygoid

Question 11

What innervates Geniohyoid?

Answer 11

C1

Question 12

What innervates mylohyoid?

Answer 12

Nerve to mylohyoid

Question 13

What innervates ABG?

Answer 13

Nerve to mylohyoid

Question 14

What movement is jaw opening?

Answer 14

Hinge

Question 15

What movement is wide jaw opening?

Answer 15

Hinge and slide

Question 16

What movement is protrusion?

Answer 16

Slide

Question 17

Where does the condyle sit?

Answer 17

Glenoid fossa

Question 18

What does the lateral ligament function to do?

Answer 18

Restricts posterior, lateral and inferior movement

Restricts contra lateral medial movement

Limits extent of pure hinge movement

Question 19

What are the accessory ligaments?

Answer 19

Stylomandibular
Sphenomandibular
Pterygomandibular

Question 20

What is the function of accessory ligaments?

Answer 20

Limits range of movement

Question 21

What are the 2 compartments of the articular disk?

Answer 21

Upper - slide
Lower - hinge

Question 22

What are the 5 zones of the articular disk ?

Answer 22

Anterior extension
Posterior extension
Disc; anterior band, int zone, posterior band

Question 23

What part of the disk if continuous with the lateral pterygoid?

Answer 23

Anterior extension

Question 24

What parts of the TMJ are innervated?

Answer 24

Joint capsule

Question 25

What is the main source of innervation to the TMJ?

Answer 25

Trigeminal- mandibular division - auriculotemporal

Question 26

What is the blood supply to the TMJ?

Answer 26

Branches of external carotid - maxillary - superficial temporal

Question 27

What are the 4 types of articulators?

Answer 27

Simple hinge Plane line Average value Semi adjustable

Question 28

What is the purpose of a simple hinge articulator?

Answer 28

Holds casts together

Question 29

What is the purpose of simple hinge articulator?

Answer 29

Holds casts together

Question 30

What is the purpose of plane line articulator?

Answer 30

Restorations involving guidance Arbitrary hinge

Question 31

What is the purpose of an average value articulator?

Answer 31

Fixes prostheses for teeth involved in guidance Removable prostheses

Question 32

What is the name of the mandibular semi adjustable articulator?

Answer 32

Debar Mark II (arcon)

Question 33

What other instrument is needed to take a measurement with the denar articulator?

Answer 33

Face bow

Question 34

What is the semi adjustable denar articulator used for?

Answer 34

Bridges/ crowns involved in guidance

Question 35

What measurements do u need for using the semi adjustable articulator?

Answer 35

RCP relevant excursions

Question 36

what position is reproducible?

Answer 36

Rested position

Question 37

What are index teeth?

Answer 37

Teeth that are in contact Canines Molars

Question 38

What planes are used for the Fox’s guide plane?

Answer 38

Frankfort Interpapilliary

Question 39

What can be used to examine ICP and excursions?

Answer 39

Articulating paper

Question 40

What is the importance of OVD RVD and FWS?

Answer 40

Face height Eating

Question 41

How do you get patient into RCP?

Answer 41

Tongue to roof of mouth

Question 42

How can you assess vertical dimensions?

Answer 42

Willis gauge Mirror handle

Question 43

How do you calculate FWS?

Answer 43

RVD-OVD

Question 44

What materials are available for recording occlusion?

Answer 44

Carding wax Silicone bite registration paste

Question 45

what is ICP?

Answer 45

intercuspal position

Question 46

what is RCP?

Answer 46

retruded contact position?

Question 47

what is OVD?

Answer 47

occlusal vertical dimension

Question 48

what is RVD?

Answer 48

rest vertical dimension

Question 49

what occurs on the working side during a lateral excursion?

Answer 49

teeth in contact bennet movement (rotation around vertical axis, lateral movement)

Question 50

what happens on the non-working side during a lateral excursion?

Answer 50

teeth do not contact bennet angle (downwards, forwards over eminence, medial movement)