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Tim's Cards > Occlusion Test 1 > Flashcards

Occlusion Test 1 Flashcards

1
Q

In the temporomandibular ligament:

What limits normal rotational opening movement?

A

Outer Oblique Portion

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2
Q

In the temporomandibular ligament:

What limits posterior movement of the Condyle and Disc?

A

Inner Horizontal Portion

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3
Q

T/F

In Centric Relation, the condylar position does NOT need any tooth contact to be obtained

A

True

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4
Q

Where is the Condyle positioned in proper Centric Relation?
Where is the disc?
(between what 2 things is the disc?)

A

Superior and Anterior

Properly interposed between Condyle and Temporal Bone

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5
Q

What does the Centric Relation of the mandibular position describe?

A

Most stable position

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6
Q

What is the position of the mandible that displays minimal tonus?

A

Centric Relation

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7
Q

T/F

The Centric Relation exhibits articulation on the thickest portion of the articular disc

A

False

*thin portion

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8
Q

In Maximum Intercuspation in Clinical conditions, what determines the occlusal position?

A

The teeth

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9
Q

If centric relation and maximum intercuspation do not coincide, the patient will…

A

Have a “slide”

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10
Q

T/F
In Maximum Intercuspation in Clinical Conditions, the occlusal forces will concentrate down the long axis of posterior teeth
It will also be dynamic and change throughout a patient’s life.

A

True

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11
Q

What are 3 normal functional activities of the Temporalis?

1 Parafunctional?

A

Elevation
Retraction (retrusion)
Positions mandible to obtain centric relation

Clenching

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12
Q

T/F

The temporalis causes clenching when muscle is overused and produces lateral movements of the mandible

A

False

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13
Q

What establishes the mid-most position of the mandible at the Centric Relation?
It is the relationship of the medial pole of the condyle and the…

A

Medial Pterygoid on One Side

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14
Q

What makes the normal curve of occlusion possible?

A

Medial Pole of Condyle prevents Posterior Teeth from moving TOWARD the midline by STEEP medial wall of fossa.

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15
Q

Superior Head of the Lateral Pterygoid
2 Normal functions:
1 Pathology:

A

Sustains Consistent position Articular Disc
Progressively active during closing

Spasms due to occlusal dysfunction

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16
Q

The Superior Head of the Lateral Pterygoid works with action/inactivity of the….

A

Inferior head lateral pterygoid

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17
Q

T/F
The clinician can palpate some portion of the Superior Head of the Lateral Pterygoid even through it is deep in placement and mostly covered by the Medial Pterygoid.

A

True

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18
Q

The Superior Head of the Lateral Pterygoid is progressively active during opening movement of the mandible and is deep in placement and is mostly covered by the masseter, so the clinician cannot palpate some portion of the muscle

A

False

  • progressively active during Closing
  • *covered by the Medial Pterygoid
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19
Q

T/F

The mylohyoid muscle will slightly close the mandible

A

False

*slightly depress (open)

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20
Q

Name 3 actions of the Mylohyoid muscle

A

Slightly depress (open) mandible
Elevate hyoid, tongue, floor oral cavity
Speaking/Swallowing

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21
Q

What occurs during normal jaw opening movement, during the latter stages of mandibular opening?

A

The inferior head of the lateral pterygoid is at maximum point of contracture

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22
Q

T/F
In late normal jaw opening, the condyle has moved anteriorly as far as possible, the articular disc is posterior, and the superior retrodiscal tissues are at maximum tautness

A

True

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23
Q

Which of muscle of mastication exhibits a superior and slightly medial force vector in the frontal plane?

A

Medial Pterygoid

*superior and slightly medial = Mediotrusive

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24
Q

T/F
The temporomandibular joint is innervated by one nerve that provides motor innervation and a different nerve that provides sensory innervation to individual muscles

A

False

*same nerve

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25
Q

T/F

The same nerve provides motor and sensory innervation to the temporomandibular joint

A

True

*Trigeminal (V)

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26
Q

What provides most of the innervation to the Temproromandibular joint?
Additional innervation provided by what 2 nerves branching from V3?

A

Auriculotemporal nerve
(75%)

Deep temporal n.
Masseteric n.

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27
Q

What provides the primary vascularization to the temporomandibular joint?

A

Superficial Temporal branch External Carotid Artery

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28
Q

From where does the mandibular condyle receive its vascular supply?
2 sources

A

Through marrow spaces from
Inferior Alveolar a.
Feeder vessels

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29
Q

Why does the Maxillary arch dominate/influence the Mandibular arch?
2 reasons

A

Larger (starting distal 3rd Molar)

Wider

30
Q

Which arch has more to do with esthetics?

A

Maxillary

31
Q

T/F
Esthetics are embedded more in the mandibular arch than in the maxillary arch, because the smile line is extremely evident with mandibular anterior teeth
The maxillary arch is smaller than in the mandible, from the distal of a third molar on one side through the middle of each tooth to the third molar on the other side
The maxillary arch is more narrow, or less in measurement from right to left sides

A

False

32
Q

Regarding the intra-arch alignment of teeth, the maxillary teeth having only one namesake in the opposing arch are the?

A

Third molars

33
Q

What tooth on the maxillary arch only contacts one occlusal tooth?

A

Maxillary 3rd Molars

34
Q

T/F

The ideal plane of occlusion is NOT flat as it allows too many contacts on posterior teeth

A

True

35
Q

The proper plane of occlusion will permit what?

A

Simultaneous functional contacts in Controlled areas

36
Q

What permits maximum use of tooth contacts during function?

A

Curved plane

37
Q

How are teeth positioned in the arches to coordinate varied degrees of inclination?

A

Strategically

38
Q

T/F
The ideal plane of occlusionit is flat, is a curved plane that allows for too many contacts on most posterior teeth on both sides of the mouth, is a flat plane that permits maximum use of tooth contacts during function

A

False

39
Q

When examining the distance between the condyle and the first premolars on one side of the oral cavity, the occlusal forces exerted on the First Premolars are approximately ___ per cent less than those forces exerted on the Third Molars

A

50

40
Q

Where do occlusal contacts ideally occur?

2 places

A

ideally: Between cusp tip and depth of fossa
or: cusp tip and flat surface

*flat surface is More Stable

41
Q

Where should contacts not occur?

A

Cuspal inclines

*less stable

42
Q

Define Class 2 Malocclusion:

2 main things

A

Distal 1st Molar and Canines
(on mandible)

Excessive Anterior horizontal overlap

43
Q

When a patient is in static or stationary occlusion, occlusal contacts should occur between a cusp tip and?

A

The depth of an opposing fossa

44
Q

T/F

The mesiolingual cusp of the maxillary first molar = mesial fossa of the mandibular first molar

A

False

*Central Fossa

45
Q 
Match the following:
Lingual cusp of the Max 1PM
Lingual cusp of the Max 2PM
Mesiolingual cusp Max 1M
Distolingual cusp Max 1M
Mesiolingual cusp Max 2M
Distolingual cusp Max 2M
A

Distal marginal ridge/distal fossa Mb 1PM
Distal marginal ridge/distal fossa Mb 2PM
Central fossa Mb 1M
Distal marginal ridge/distal fossa Mb 1M
Central fossa Mb 2M
Distal marginal ridge/distal fossa Mb 2M

46
Q

The condition in which maximum intercuspation is on occlusal inclines, leading to excessive wear, fractures, etc is called?

A

Bruxism

47
Q

During a right lateral movement of the mandible, the left side of the mandible is termed the?

A

Non-working side

48
Q

The pathway of the maxillary cusps positioned over the mandibular teeth which is parallel to the mandibular molar lingual groove and travels toward the tongue is termed?

A

Working

49
Q

The Working Pathway of Maxillary Cusps positioned over the Mandibular teeth travels in what direction?
2 things

A

Parallel to Lingual Groove

Travels Toward the Tongue

50
Q

Regarding maxillary cusp positioning over Mandibular teeth, the nonfunctional area is ____ than the functional area.

The functional pathway is all the area the mandible can _____

The non-functional pathway is the area the mandilbe ________.

A

Larger

Move in to

Cannot move into

51
Q

T/F

The non-functional pathway is the area that the mandible cannot normally move into

A

True

52
Q

What direction will the Mesiofacial Cusp on a Left Mb 1M travel during a Non-working movement?
(direction and through which embrasure)

A

Max 1M mesial marginal ridge Diagonally through Lingual embrasure between Max 2PM and Max 1M

53
Q

Diagram Max 1M, arrow pointing outward. What Mb movement indicated?

A

Working Laterotrusion

54
Q

Diagram Max 1M, arrow pointing inward (diagonally and posteriorly over distolingual cusp toward lingual). What Mb movement indicated?

A

Non-functional

55
Q

When viewing a pantographic tracing of mandibular border movements from a sagittal view at the level of the mandibular central incisors, which position exhibits tooth contact?

A

Edge-to-edge incisal

56
Q

When viewing a pantographic tracing of mandibular border movements from a horizontal view at the level of the mandibular central incisors, which position is the most anterior?

A

Maximum Protrusion

57
Q

When viewing a pantographic tracing of mandibular movement at the condylar level on the left side, the long sloping arc that travels mediotrusively and anteriorly is called the?

A

Non-working condyle pathway

58
Q

What happens during the first part of the lateral movement of the mandible?
The movement is measured as the distance between what 2 things?

A

Medial pole Non-working condyle moves
(down articular eminence against medial wall of fossa)

Non-working condyle
Mesial wall glenoid fossa

59
Q

If condylar guidance was the only vertical determinant of occlusion, what would the Cusp Angles need to be in order to avoid collision in eccentric movements?

A

Less than angle of Articular Eminence

60
Q

If a patient has a loose temporomandibular ligament on their working side and a sizable distance between the medial wall of the fossa and medial pole of the condyle on the non-working side, this would cause?

A

The cusp heights on the non-working side to be shorter

61
Q

T/F

Anterior guidance is a function of the relationship between the maxillary and mandibular ANTERIOR teeth.

A

True

62
Q

T/F

Anterior guidance consists of the vertical and horizontal overlaps as measured at the Anterior teeth

A

True

63
Q

What happens to the Anterior Guidance angle when Vertical overlap increases?
(when horizontal overlap remains unchanged)

A

Anterior Guidance Angle Increases

64
Q

In a patient exhibiting both anterior and posterior controlling factors of 45 degrees each, what would be the angle of the mandibular first premolar as it moves away from the horizontal reference plane when the mandible is opened?

A

45 Degrees

65
Q

As the plane of occlusion becomes ______ parallel to the angle of the articular eminence, the posterior cusps will need to be _____ in order to avoid collisions with each other.

A

More nearly

Shorter

66
Q

The less parallel the horizontal reference plane is to the Condylar Guidance Angle, the ______ the cusps _____ be

A

Steeper

CAN

67
Q

Regarding the timing of mandibular lateral translation, the cusps on the non-working side must be shorter if?

A

The immediate sideshift has a noticeable measurement

68
Q

The Direction and Location of _____ and _____ on occlusal surfaces are influenced by Horizontal Determinants

A

Ridges

Grooves

69
Q

Horizontal Determinants influence _____ of cusps during eccentric movements (cusps pass between ridges and over grooves)

A

Placement

70
Q

When examining mandibular movement on the Non-working side, the closer the tooth is to the midline, the _______ the angle between the laterotrusive and mediotrusive pathways.

A

Smaller

71
Q

When contemplating the effect of anterolateral and posterolateral translation of the Working condyle, the more posterolateral the movement of the working condyle, the _______ is the angle formedby the mediotrusive and laterotrusive pathways.

A

Larger

72
Q

When altering the vertical determinants of occlusal morphology by making the plane of occlusion more parallel to condylar guidance, the effect on cusp height and fossa depth will display?

A

Shorter Posterior Cusps

Tim's Cards (140 decks)

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