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Occlusion > Occlusal Morphology > Flashcards

Occlusal Morphology Flashcards

1
Q

What are the 3 structures controlling movement patterns?

A

Left TMJ, Right TMJ, and Anterior teeth

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2
Q 
If  the posterior teeth make  \_\_\_\_\_ during lateral or  protrusive movement:
•We lose the class III lever advantage
•We lose the biomechanical advantage of muscle  inhibition, and the masseter, temporalis and medial pterygoid  muscles can contract
•We initiate the class  I or the class  II levers which can create heavy pressures on posterior  teeth.
A

contact

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3
Q

Condylar Guidance and The two temporomandibular joints are the ____ controlling factors

A

Posterior

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4
Q

The angle at which the condyle moves away from a horizontal reference plane

A

Condylar guidance angle•

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5
Q

Is the condylar guidance angle greater or lesser for the rotating and protruding condyle?

A

Lesser

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6
Q

Is the condylar guidance angle greater or lesser for the orbiting?

A

Greater

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7
Q

_____ condyle Moves forward, downward, and inward•Moves over the steeper medial wall of the fossa•Larger angle than protrusive

A

Orbiting Condyle

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8
Q

_____ Condyle Movement•Moves forward and downward, contacting the articular eminence.•Smaller angle than the orbiting condyle

A

Protrusive condyle movement

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9
Q

Angle made between the protrusive movement of the condyle and the orbiting border movement

A

Fisher Angle

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10
Q

What are the 2 anterior controlling factors?

A

Anterior guidance and anterior teeth

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11
Q

Determine how the anterior portion of the mandible moves

A

Anterior teeth

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12
Q
  • Dictated by how the incisal edges of the mandibular teeth glide over the lingual inclines of the maxillary teeth.
  • A variable rather than a fixed factor
A

Anterior Guidance

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13
Q 
Altered by:
•Restorations
•Orthodontics
•Extractions
•Caries
•Habits
•Tooth Wear
A

Anterior guidance

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14
Q

_____ Influenced by pathway the cusp tip travels across it’s opposing tooth•Must harmonize with the opposing tooth

A

Tooth Morphology

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15
Q

Should there be any cusp tips touching in mandibular excursions?

A

No

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16
Q

Each cusp tip moves laterally, through a ____ or ______ on the opposing tooth.

A

groove or embrasure space

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17
Q

T/F: The nearer a specific tooth is to the anterior teeth, The more the anatomy of the anterior teeth will influence it’s movement

A

True

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18
Q

______ angle dictates anterior teeth disclusion

A

Anterior angle

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19
Q

_____ angle dictates posterior teeth disclusion

A

Condylar

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20
Q

Should cusp tips with flatter posterior and anterior controlling factors be flatter or steeper?

A

Flatter

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21
Q

Should cusp tips with steeper posterior and anterior controlling factors be flatter or steeper?

A

Steeper

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22
Q

Do you want sharp or flat cusps?

A

Sharp

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23
Q

What are the 2 factors influencing the vertical determinants?

A

Height of cusps and depths of fossa

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24
Q

The _____ the eminence•The more the condyles must move inferiorly•Thus greater vertical movement•Thus allows for steeper posterior cusps

A

steeper

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25
Q

The steeper the angle of the eminence the _____ the posterior cusp tips may be

A

steeper

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26
Q

As horizontal overlap increases the anterior guidance angle _____

A

decreases

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27
Q

As vertical overlap increases the anterior guidance angle _____

A

increases

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28
Q

______ in Horizontal Overlap leads to Decreased anterior guidance angle•Less vertical component•Flatter posterior cusps are required.

A

Increase

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29
Q

An imaginary surface that touches the incisal edges of the incisors and cusp tips of the occluding surfaces of the posterior teeth.

A

Plane of Occlusion

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30
Q

If there is a greater angle of the plane of occlusion, you can have flat or steep cusps?

A

Steeper cusps

31
Q

AS THE PLANE OF OCCLUSION BECOMES MORE PARALLEL TO THE ANGLE OF THE EMINENCE, THE POSTERIOR CUSPS MUST BE MADE _______

A

SHORTER

32
Q

THE FLATTER THE PLANE OF OCCLUSION, THE ______ THE CUSP HEIGHT CAN BE

A

GREATER

33
Q

If the Curve of Spee has a SHORT RADIUS: the ANGLE at which the mandibular teeth move away from the maxillary teeth WILL BE ____ THAN WITH A LONG RADIUS, therefore the CUSPS will need to be SHORTER

A

LESS

34
Q

If the Curve of Spee has a SHORT RADIUS: the ANGLE at which the mandibular teeth move away from the maxillary teeth WILL BE Less THAN WITH A LONG RADIUS, therefore the CUSPS will need to be ______

A

SHORTER

35
Q

Curve of Spee, a longer radius causes a _______ plane of occlusion.

A

flatter plane

36
Q

A shorter radius cause a more ______ plane of occlusion.

A

acute

37
Q

As the mandible moves forward, the posterior part of the plane will also move forward and will contact the maxillary arch. The _____ the arc (curve of Spee), the more probable is the chance of contact.

A

greater

38
Q

As the mandible moves forward, the posterior part of the plane will also move forward and will contact the maxillary arch. Thus with a ____ arch, the cusps can be slightly longer.

A

flat

39
Q

The mandible is moving away from a horizontal reference plane at a 45 degree angle. The flatter the plane of occlusion, the greater will be the angle at which the mandibular posterior teeth move away from the maxillary posterior teeth and therefore the _____ the cusp can be.

A

taller

40
Q

If the plane of occlusion is rotated more posteriorly, it can be seen that more posterior teeth will be positioned distal to the perpendicular from the reference plane, and will have to have _____ teeth to prevent contact which can be classified as interferences.

A

shorter

41
Q

Posterior teeth located _____ to the radius need shorter cusps than those located _____ to the radius.

A

distal; mesial

42
Q

An angle formed between the path of the orbiting condyle and the protrusive movement path of the condyle as measured on the horizontal plane.

A

Bennett Angle

43
Q

What 3 movements does the orbiting condyle make?

A

Downward
Forward
Inward

44
Q

The tight ____ ligament on the rotating condyle will prevent lateral movement of this condyle

A

Capsular ligament

45
Q

_____ ligament: VERY TIGHT•PURE ARCING MOVEMENT AROUND THE ROTATING CONDYLE•NO LATERAL TRANSLATION OF THE MANDIBLE

A

Temporomandibular ligament

46
Q

THE MORE MEDIAL THE MEDIAL WALL IS FROM THE CONDYLE ,THE _____ LATERAL TRANSLATION MOVEMENT

A

MORE

47
Q

The greater the lateral translation movement the _____ the posterior cusp tips must be.

A

shorter

48
Q

Latero-superior movement requires a _____ posterior cusp

A

shorter

49
Q

Inferior movement allows _____ cusps

A

taller

50
Q

The rotating condyle movements occur within a ___ degree cone

A

60 degree cone

51
Q

The more superior the lateral translation movement of the rotating condyle (1), the _____ is the posterior cusp.

A

shorter

52
Q

The more inferior the lateral translation movement (3) the ______ is the cusp.

A

taller

53
Q

If the space btwn condyle and fossa is denser and does not allow the immediate movement, the result is (2), which displays a more gradual ______

A

progressive side shift

54
Q

If you have immediate movement due to larger distance between condyle and medial wall of fossa on lateraltrusive movement, you will have the movement called ______

A

immediate side shift

55
Q

The greater the distance of the tooth from the rotating condyle the _____ the angle formed by the laterotrusive and mediotrusive pathways.

A

wider

56
Q

Teeth in the anterior, e.g., premolars will have _____ angles between working and balancing pathways

A

larger

57
Q

Teeth in posterior e.g., molars, will have _____ angles between working and balancing pathways

A

smaller

58
Q

Greatest angle between working and balancing pathways are by teeth ______ from both rotating condyle and midsagittal plane

A

furthest away

59
Q

Smallest anges between working and balancing pathways are generated by teeth _____ both the rotating condyle and midsagittal plane

A

nearer

60
Q

As the amount of lateral translation movement increases, the angle between the mediotrusive and laterotrusive pathways generated by the centric cusp tips ______

A

increases

61
Q

The greater the intercondylar distances, the ______ the angle formed by the laterotrusive and mediotrusive pathways.

A

smaller

62
Q

As intercondylar distance increases the distance between the condyle and the tooth ______

A

increases

63
Q

Greater vertical overlap leads to ____ cusps

A

Taller

64
Q

Greater horizontal overlap leads to ______ cusps

A

Shorter

65
Q

More parallel to the condylar guidance leads to _____ cusps

A

Shorter

66
Q

More acute the curve of spee requires ______ cusps

A

Shorter

67
Q

Greater the lateral translation movement requires _____ cusps

A

Shorter

68
Q

More superior movement of the rotating condyle in lateral translation movement requires _____ cusps

A

Shorter

69
Q

Greater immediate side shift in lateral translation movement requires _____ cusps

A

Shorter

70
Q

Greater the distance from rotating condyle leads to ____ the angle is between laterotrusive and mediotrusive pathways

A

Wider

71
Q

Greater the distance from midsagittal plane, the _____ the angle is between laterotrusive and mediotrusive pathways

A

Wider

72
Q

Greater the lateral translation movement, the ____ the angle between laterotrusive and mediotrusive pathways

A

Wider

73
Q

Greater the intercondylar distance, the _____ the angle between laterotrusive and mediotrusive pathways

A

Smaller

Occlusion (13 decks)

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