Occlusion - Quiz 1

Question 1

What is the entire cranial-mandibular complex that encompasses the articulation of the teeth and the surrounding structures that produce and limit movement?

Answer 1

Craniomandibular Apparatus

Question 2

What 2 fossae does the Temporal Bone create?

What about these fossae limit movement?

Answer 2

Glenoid
Mandibular

Shape

Question 3

What is the portion of the mandible that Articulates in the mandibular fossa?

Answer 3

Condyle

Question 4

The mandible is the only bone in the human body that possesses ______ axes of rotation

Answer 4

Two

Question 5

Ligaments supporting the TMJ have what two functions?

Answer 5

Limit mandibular movement
Protect musculature (esp. during extreme movement)

Question 6

Ligaments supporting the TMJ are NOT…

3 things

Answer 6

Elastic
Contractile
Innervated

Question 7

What does the Stylomandibular ligament limit?

Answer 7

Excessive Protrusion

Question 8

The Sphenomandibular ligament limits ____ movement and _____ movements.

Answer 8

Protrusive
Lateral Mandibular (lt and rt)

Question 9

The position of the Temporomandibular Ligament is designed to limit the _____ rotational movement of the mandible.

Answer 9

Pure Hinge Axis

Question 10

At what measurement is the Temporomandibular Ligament at full length?
Measured where?

Answer 10

15-20 mm

Incisal Edges (Max to Mb)

Question 11

The Temporomandibular Disc consists of hyaline connective tissue.

Answer 11

False

Question 12

T/F

The Temporomandibular Disc possesses innervation and has significant vascularization

Answer 12

False

Question 13

T/F

The temporomandibular Disc interfaces between the mandible and the temporal bone

Answer 13

True

Question 14

T/F

The temporomandibular Disc is pliable and bi-concave.

Answer 14

True

Question 15

The collateral ligaments of the Temporomandibular Disc attach to where?

Answer 15

Condyle in medial and lateral position

Question 16

What type of connective tissue makes up the Temporomandibular Disc?

Answer 16

Fibrous

Question 17

What is another term for Maximum Intercuspation?

What is a “common” term?

Answer 17

Centric Occlusion

Habitual Occlusion
achieved by habit

Question 18

Maximum intercuspation describes what aspect of tooth position?

Answer 18

Occlusal

Question 19

T/F

In Maximum Intercuspation the teeth are in the most comfortable position

Answer 19

True

Question 20

In terms of achievability and reproducability, describe Maximum Intercuspation.

Answer 20

Easily Achievable

Not always Reproducible

Question 21

Only _____% of the population have no centric relation to maximum intercuspation discrepancy or slide.

> the centric relation position is anterior, superior and slightly lateral to the maximum intercuspation position

Answer 21

15%

Question 22

At what point will maxillary and mandibular teeth come together most completely?

Answer 22

Maximum Intercuspation

Question 23

When the teeth come fully together what is happening to the condyles?
What direction would that be?

Answer 23

Must move out of ideal position

Anterior, Superior, and Slightly lateral to Maximum Intercuspation position

Question 24

T/F
For patients with a slide, after the first occlusal contact in centric relation is obtained the patient continues to close and slide on inclines of anterior teeth

Answer 24

False

*Posterior Teeth

Question 25

T/F | The first tooth contact is usually on two or more anterior teeth

Answer 25

False *Posterior teeth

Question 26

What is implied by the term Canine Protected Articulation?

Answer 26

Only canines touch during complete extent of Lateral Movement

Question 27

What type of Occlusal Scheme is Group Function Occlusion?

Answer 27

Secondary | most practical approach

Question 28

What type of occlusal scheme is ideal? | What type do older patients usually exhibit?

Answer 28

Canine Protected Articulation Group Function

Question 29

What occurs simultaneously in Ideal Occlusion?

Answer 29

Centric relation and maximum intercuspation

Question 30

In Ideal Occlusion, how many teeth contact simultaneously?

Answer 30

All of them

Question 31

What occurs in Posterior Teeth in Ideal Occlusion? | 2 things

Answer 31

Long axis occlusal forces Posterior tooth contacts dominant

Question 32

In Ideal Occlusion, what guides eccentric movements?

Answer 32

Anterior teeth

Question 33

T/F | In Ideal Occlusion, Crossover Contacts are seen in Posterior teeth.

Answer 33

False *no crossover contacts

Question 34

The proper alignment of the articular disc is _____ and the thinnest, and most articulated portion is in the _____ section

Answer 34

Slightly Anterior Middle

Question 35

Name 4 actions of the Masseter

Answer 35

Elevation Clenching Protrusion Lateral movement *NOT primary protrusive/lateral movement muscle

Question 36

T/F | The Masseter is the primary muscle for Protrusion and Lateral Movement

Answer 36

False

Question 37

``` 3 major/1 minor function of the Medial Pterygoid normal not-primary primary parafunctional ```

Answer 37

Elevation Protrusion (not primary) Mediotrusive (primary) Clenching (parafunctional)

Question 38

What is the primary muscle of mastication involved with Protrusive and Lateral movements?

Answer 38

Inferior Head - Lateral Pterygoid

Question 39

T/F | The Inferior Head of the Lateral Pterygoid can be palpated

Answer 39

False

Question 40

The inferior Head of the Lateral Pterygoid is active during ____ movement of the mandible

Answer 40

Opening

Question 41

What is the most frequent muscle of mastication to exhibit spasm due to occlusal dysfunction?

Answer 41

Inferior Head Lateral Pterygoid

Question 42

The accessory muscles of mastication (geiohyoid, mylohyoid, digastric, stylohyoid) have what 5 collective functions?

Answer 42

``` Elevate hyoid Elevate base of tongue Depress mandible when hyoid fixed Assist in cranium stabilization (during Mb mvmt) Speaking/Swallowing control ```

Question 43

Describe 4 aspects of Normal Early Jaw Opening

Answer 43

Inferior head Lat. Pterygoid contracts (controlled, slow, consistent) Condyle moves anteriorly (beginning posterior border art. eminence travels downward) Articular Disc Moves With Condyle (sup. lat. Pterygoid minimally contracts) Superior Retrodiscal Tissues Slight Tautness

Question 44

``` Match the following Muscles to vectors: Anterior Temporalis Posterior Temporalis Masseter Posterior Digastric Inferior heat Lateral Pterygoid ```

Answer 44

``` Superior and slightly anterior Posterior and slightly superior Superior and slightly anterior Superior and Posterior Anterior ```

Question 45

Which of the following positions during the eight stage sequence of normal condyle-disc movement occurs or is obtained first?

Answer 45

Centric Relation

Question 46

Regarding the Functional Elevators for the muscles of mastication, Unilateral contraction of which muscle will produce mediotrusive movement?

Answer 46

Medial Pterygoid

Question 47

The bilamminar region of the Retrodiscal Tissue is loose vascular tissue which serves as what attachment for the articular disc? (also fills with fluid)

Answer 47

Posterior

Question 48

The retrodiscal area splits between the inferior and superior retrodiscal ligaments _____ to the articular disc.

Answer 48

Posterior

Question 49

When will orthopedic stability be achieved in occlusion?

Answer 49

Intercuspal position is in Harmony with Musculoskeletal position of Condyles in fossa

Question 50

What will the elevator muscles do when the teeth are apart?

Answer 50

Maintain condyles in Muculoskeletally stable positions