Quiz 1

Question 1

Craniomandibular apparatus

Answer 1

The cranai-mandibular complex including the artiulation of the teeth and the surrounding structures. Liming movement.

Question 2

Temporal bone

Answer 2

a portion of the bone that forms the glenoid or mandibular fossa. The shape of the fossa limits mandibular movement.

Question 3

Chondyle

Answer 3

the portion of the mandible that articulates the mandibular fossa. There is a left and right condlye. The shape of the condlye limit the movement of the mandibular movement. The mandubile is the only place in the human body that posses 2 axis of rotation

Question 4

Function of the ligaments(5 things)

Answer 4

Limit mandibular movement, protect the muscles form extreme movement, non-elastic, non-contractile, no innervations

Question 5

Sylomandibular

Answer 5

limits excressive protrusive movement on the mandible

Question 6

Sphenomandibular

Answer 6

limits protrusive and lateral movement (from either left or right) of the mandilbe

Question 7

what bone in the body has 2 axis of rotation?

Answer 7

chondlye

Question 8

Limitation of movement with temporomandibular ligament (2)

Answer 8

• The position of the temporomandibular ligament is designed to limit the pure hinge axis rotation movement of the mandible.
• The full length of the TM ligament occurs no more than 15-20mm of opening as measured btwn the incisal ridge of the maxillary and mandibular incisor.

Question 9

Temporomandibular or articular disc (7)

Answer 9

Fibrous CT, Interface btwn the temporal and the mandible, Pliable texture, Biconcave in shape, Collateral ligament attached it to the chondyle in a medial and lateral position, not innervated, not vasculatar

Question 10

Maximum intercuspation (TOOTH) (5)

Answer 10

Also known as centric occlusion, which is now obsolete
commonly referred to as habitual cencentic or habitural occlusion because that patient can achieve this position be habit
Maximum intercuspation describes an occlusal relationship or tooth position
The teeth are contacting in a position that the patient finds comfortable
It is easily achievable but not easily reproducable

Question 11

Slide from centric relation to maximum intercuspation (4)

Answer 11

look at slide

Question 12

Canine protected articulation

Answer 12

Implies that only carnines are involved lateral movements

-ideal occlusal scheme

Question 13

group function occlusion entails

Answer 13

the posterior and some anterior teeth are in some contact during the complete extent of lateral movement
- considered the secondary occlusal scheme or the most practical approach

Question 14

older patients commonly exhibit?

Answer 14

group function occlusion

Question 15

Ideal (no slide) occlusion (6)

Answer 15

Centric relation and maximun intercuspation occur simulaneously
all teeth contract simultanously
all occlusal forces on posterior teeth are directed do the long axis of the teeth
Posteror teeth contacts dominate over anterior tooth contacts
no eccentric movement are guided by the anterior teeth
no crossover contacts posterior teeth should be seen

Question 16

what is the correct alignment of the articular disc

Answer 16

proper alignment of the articular dics is slightly anterior and the thinnest and most articulated portion is in the middle section.

Question 17

Masseter actions (4)

Answer 17

Elevates the mandible in a superior direction evenually contact the maxillary teeth
Aids with protursive and lateral movement ( both minimal players)
Causes clenching of the teeth ( parafunctional activity)

Question 18

Medial Pterygoid actions (4)

Answer 18

Elevates the mandible in a superior direction evenually contact the maxillary teeth
Aids with protursive
produces mediotrusive movement
Parafunctional– minor in clenching of the teeth

Question 19

Lateral Pterygoid (inferior head) (4)

Answer 19

it is active during opening movment of the mandible- normal

Primarily involved in protrusive and lateral movment

most frequent muscle of mastification to exhibits spasms as a result of some type of occlusal dysfunction— parafunctional

muscle of mastification is so deep that the clinican can’t palpate it.

Question 20

Suprahyoid accessory muscles (5)

Answer 20

Elevates the base of the tongue and the hyoid

depresses the mandible with the hyoid bone is fixed

assist in stabilizing the cranium and the mandible during normal mandibular movements

important in controlling the pharxyn and esophagus during swallowing and speaking activities

Question 21

Normal jaw opening movement

Answer 21

refer to slide

Question 22

Anterior temporalis force vector

Answer 22

superior and slightly anterior

Question 23

Posteroir temp force vector

Answer 23

posterior and slightly superior

Question 24

Middle temp force vector

Answer 24

superfial and slightly posterior

Question 25

Masseter force vector

Answer 25

superficial and slightly anterior

Question 26

Posterior digastic mucsle force

Answer 26

superior and posterior

Question 27

inferior head of the lateral pterygoid muscle force vector

Answer 27

anterior

Question 28

What is the first, starting point for condyle-disc movment

Answer 28

centric relation

Question 29

funtional elevator- unilateral contraction medial pterygoid

Answer 29

will produce mediotrusive movement and protrusion

Question 30

what is a mediotrusive movement (medial pterygoid)

Answer 30

movement of the mandible on the same side toward the midline

Question 31

Retrodiscal tissue construct

Answer 31

The bilateral region is looes vascular tissue which is the posterior attachment of the articular disc and also fills with fluid

The retrodiscal area is the posteror part that splits btwn the inferior and superior retrodiscal ligament, posterior to the articular disc

Question 32

when will orthopedic stability exist?

Answer 32

will exist only when the stable intercuspal position of the teeth is in harmony with the musculoskeletal stable position of condyle in fossa.
is needed to minimize muscle dysfunction

Question 33

With the teeth apart, the elevator muscles to attempt to keep the condyle…

Answer 33

in their musculoskeletally stable position