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Tim's Cards > Occlusion - Quiz 1 > Flashcards

Occlusion - Quiz 1 Flashcards

1
Q

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

A

Craniomandibular Apparatus

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2
Q

What 2 fossae does the Temporal Bone create?

What about these fossae limit movement?

A

Glenoid
Mandibular

Shape

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3
Q

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

A

Condyle

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4
Q

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

A

Two

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5
Q

Ligaments supporting the TMJ have what two functions?

A 
Limit mandibular movement
Protect musculature (esp. during extreme movement)
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6
Q

Ligaments supporting the TMJ are NOT…

3 things

A

Elastic
Contractile
Innervated

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7
Q

What does the Stylomandibular ligament limit?

A

Excessive Protrusion

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8
Q

The Sphenomandibular ligament limits ____ movement and _____ movements.

A 
Protrusive
Lateral Mandibular (lt and rt)
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9
Q

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

A

Pure Hinge Axis

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10
Q

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

A

15-20 mm

Incisal Edges (Max to Mb)

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11
Q

The Temporomandibular Disc consists of hyaline connective tissue.

A

False

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12
Q

T/F

The Temporomandibular Disc possesses innervation and has significant vascularization

A

False

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13
Q

T/F

The temporomandibular Disc interfaces between the mandible and the temporal bone

A

True

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14
Q

T/F

The temporomandibular Disc is pliable and bi-concave.

A

True

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15
Q

The collateral ligaments of the Temporomandibular Disc attach to where?

A

Condyle in medial and lateral position

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16
Q

What type of connective tissue makes up the Temporomandibular Disc?

A

Fibrous

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17
Q

What is another term for Maximum Intercuspation?

What is a “common” term?

A

Centric Occlusion

Habitual Occlusion
achieved by habit

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18
Q

Maximum intercuspation describes what aspect of tooth position?

A

Occlusal

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19
Q

T/F

In Maximum Intercuspation the teeth are in the most comfortable position

A

True

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20
Q

In terms of achievability and reproducability, describe Maximum Intercuspation.

A

Easily Achievable

Not always Reproducible

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21
Q

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

A

15%

22
Q

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

A

Maximum Intercuspation

23
Q

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

A

Must move out of ideal position

Anterior, Superior, and Slightly lateral to Maximum Intercuspation position

24
Q

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

A

False

*Posterior Teeth

25
Q

T/F

The first tooth contact is usually on two or more anterior teeth

A

False

*Posterior teeth

26
Q

What is implied by the term Canine Protected Articulation?

A

Only canines touch during complete extent of Lateral Movement

27
Q

What type of Occlusal Scheme is Group Function Occlusion?

A

Secondary

most practical approach

28
Q

What type of occlusal scheme is ideal?

What type do older patients usually exhibit?

A

Canine Protected Articulation

Group Function

29
Q

What occurs simultaneously in Ideal Occlusion?

A

Centric relation and maximum intercuspation

30
Q

In Ideal Occlusion, how many teeth contact simultaneously?

A

All of them

31
Q

What occurs in Posterior Teeth in Ideal Occlusion?

2 things

A

Long axis occlusal forces

Posterior tooth contacts dominant

32
Q

In Ideal Occlusion, what guides eccentric movements?

A

Anterior teeth

33
Q

T/F

In Ideal Occlusion, Crossover Contacts are seen in Posterior teeth.

A

False

*no crossover contacts

34
Q

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

A

Slightly Anterior

Middle

35
Q

Name 4 actions of the Masseter

A

Elevation
Clenching
Protrusion
Lateral movement

*NOT primary protrusive/lateral movement muscle

36
Q

T/F

The Masseter is the primary muscle for Protrusion and Lateral Movement

A

False

37
Q 
3 major/1 minor function of the Medial Pterygoid
normal
not-primary
primary
parafunctional
A

Elevation
Protrusion (not primary)
Mediotrusive (primary)

Clenching (parafunctional)

38
Q

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

A

Inferior Head - Lateral Pterygoid

39
Q

T/F

The Inferior Head of the Lateral Pterygoid can be palpated

A

False

40
Q

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

A

Opening

41
Q

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

A

Inferior Head Lateral Pterygoid

42
Q

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

A 
Elevate hyoid
Elevate base of tongue 
Depress mandible when hyoid fixed
Assist in cranium stabilization (during Mb mvmt) 
Speaking/Swallowing control
43
Q

Describe 4 aspects of Normal Early Jaw Opening

A

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

44
Q 
Match the following Muscles to vectors:
Anterior Temporalis
Posterior Temporalis
Masseter
Posterior Digastric
Inferior heat Lateral Pterygoid
A 
Superior and slightly anterior 
Posterior and slightly superior
Superior and slightly anterior
Superior and Posterior
Anterior
45
Q

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

A

Centric Relation

46
Q

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

A

Medial Pterygoid

47
Q

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

A

Posterior

48
Q

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

A

Posterior

49
Q

When will orthopedic stability be achieved in occlusion?

A

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

50
Q

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

A

Maintain condyles in Muculoskeletally stable positions

Tim's Cards (140 decks)

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