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occlusion > 12 final > Flashcards

12 final Flashcards

1
Q

the factors that determine the pattern of mand movement are:

A

TMJs and anterior teeth

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2
Q

to maintain harmony the posterior teeth need to pass close but ________ the opposing teeth during mand movement

A

not contact

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3
Q

(posterior controlling factors)
1. the angle at which the condyles move away from a horizontal reference plane is referred to as the=

  1. the condylar guidance is considered to be a ______since in the healthy patient it is unalterable
A

condylar guidance angle

fixed factor

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4
Q

(anterior controlling factors)

1.the ______determine how the anterior portion of the mand move

  1. as the mand protrudes or moves laterally, the incisal edges of the mand ant teeth occlude with
  2. the steepness of the lingual surfaces determines the amount of _______movement of the mandible
A
  1. anterior teeth
  2. the lingual surfaces of the max anterior teeth
  3. vertical movement
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5
Q

the anterior guidance is considered to be a _______rather than a fixed factor. it can be altered by:

A

variable

altered by pathologic conditions (caries, wear, dental procedures)

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6
Q

we want posterior teeth to pass close to, but not contact opposing teeth during mand movement

A

superio-inferior movement (vertical component)

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7
Q

the length of a cusp and the distance it extends into the depth of an opposing fossa depends on:
1
2
3

A
  1. anterior controlling factor of mand movement
  2. posterior controlling factor of mand movement
  3. nearness of the cusp to those controlling factors
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8
Q

vertical determinants control the function of the superior-inferior movement and influence the factor of:

A

cusp height and fossae depth

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9
Q

horizontal determinants influence the ________on the occlusal surfaces and the _____________in the horizontal plane

A

direction of grooves and ridges

placement of the cusps

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10
Q

6 vertical determinants:

A
  1. curve of spee
  2. condylar guidance
  3. anterior guidance
  4. nearness of the cusp to the controlling factor
  5. plane of occlusion
  6. mand lateral translation movement
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11
Q

posterior controlling factors:

A

fixed factors
condylar guidance
the two TMJs

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12
Q

as the mandible is protruded, the condyle descends along the articular eminence

A

condylar guidance

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13
Q

angle at which the condyle moves away form the horizontal reference plane

A

condylar guidance

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14
Q

when the mandible makes a __________movement, the condylar guidance angle is greater than when the mandible makes a ____ movement

A

lateral (greater)

protrusive

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15
Q

the steeper the eminence:

A
  1. the more the condyle must move inferiorly
  2. there is greater vertical movement
  3. it allows for steeper posterior cusps
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16
Q

the steeper the angle of the eminence, the steeper the

A

cusps

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17
Q

anterior controlling factors:

A

anterior teeth and anterior guidance

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18
Q

what determines how the ant portion of mand moves

A

anterior teeth

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19
Q

ant guidance is altered by:
1
2
3
4
5
6

A
  1. restorations, ortho, ext, caries, habits, tooth wear
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20
Q

the anterior guidance angle is formed by the intersection of the ______and the ____of the anterior teeth

A

horizontal plane

disclusive pathway

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21
Q

the anterior guidance angle is influenced by

A

VO and HO

22
Q

what stays the same and which varies
HO and VO

A

HO stays the same and VO varies

23
Q

increase in VO overlap=
increase in HO overlap=

A

increase VO overlap= increases anterior guidance angle

increase HO overlap=decreases in anterior guidance angle

24
Q

increased anterior guidance angle=

A

more vertical component and allows steeper posterior cusps

25
Q

the nearer a tooth is to the TMJ, the more the joint anatomy will influence its eccentric movement and the less the ___________influences its movement

A

anterior teeth

26
Q

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

A

plane of occlusion

27
Q

as the plane of occlusion becomes more parallel to the angle of eminence, the posterior cusps may be made

A

shorter

28
Q

anteroposterior curve from the tip of the mand canine along BUCCAL cusp tips of man posterior teeth

A

curve of spee

29
Q

with a (short/long) radius, the curve will be more acute

(curve of spee)

A

short

shorter cusps

30
Q

the flatter the plan of occlusion, the greater the

A

cusp height

31
Q

if curve of spee has short radius:

A

angle which mand teeth move away from max teeth will be less than long radius

so cusps will need to be shorter

32
Q

if the plane of occlusion is rotated more anterior then:

A

more teeth anterior to perpendicular line and would need TALLER CUSPS

33
Q

if plane of occlusion is rotated more posterior then:

A

more teeth posterior to perpendicular lone and would need SHORTER CUSPS

34
Q

this is a bodily sideshift of the mand during lateral movements

A

mandibular lateral translation

35
Q

how much inward movement is done during mandibular lateral translation????

meaning what does this depend upon

A
  1. medial wall of fossa on orbiting side
  2. inner portion of TM ligament attached to lateral pole of rotating condyle
36
Q

the more medial the medial wall is from the condyle, the more

A

lateral translation movement

37
Q

the lateral translation movement is described in

A

amount
timing
direction

38
Q

the greater the amount of lateral translation, the _______the posterior cusps must be

A

shorter

39
Q

with the rotating condyle,
laterosuperior movement requires _____posterior cusps

and inferior movement requires ____cusps

A

laterosuperior movements= shorter

inferior= taller cusps

40
Q

called immediate lateral translation (or immediate sideshift)

A

early translation (of condylar lateral translation)

41
Q

called progressive lateral translation (or progressive sideshift)

A

late lateral translation

42
Q

shift seen before the condyle begins to translate from the fossa

A

immediate lateral translation

43
Q

***condylar guidance-steeper the guidance

A

taller cusps

44
Q

***anterior guidance- greater VO

greater HO

A

taller

shorter

45
Q

***plane of occlusion- more parallel to the condylar guidance

A

shorter

46
Q

***curve of spee-more acute the curve

A

shorter cusps

47
Q

***lateral translation- greater the movement

A

shorter cusps

48
Q

***more superior movement of rotating condyle

A

shorter cusps

49
Q

***greater immediate side shift

A

shorter cusps

50
Q
A

occlusion (9 decks)

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