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Occlusion > Station Exam > Flashcards

Station Exam Flashcards

1
Q

alginate impression mixing time:

A

45-60 seconds

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2
Q

Time available from start of mix to final time at which impression can be seated without distortion:

A

working time

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3
Q

Time required for solution to gel reaction:

A

setting time

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4
Q

Setting time may also be called:

A

gelation

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5
Q

Setting time for alginate impressions:

A

3-4 minutes

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6
Q

What should the thickness of uniform distribution of an alginate impression be?

A

2-6mm

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7
Q

Describe how to remove an impression from patients mouth:

A

sharp snapping action after breaking border seal. Do not twist or rock

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8
Q

Criteria for accurate casts:

  1. free of ___/___.
  2. surface should be ___, ___ and free from ___
  3. should extend to all __.
  4. Base should be ___ thick at thinnest place
  5. Base should be ___
  6. Base should not interfere with ___
  7. Casts should have a horizontal land area of ___ at the ___
  8. Side walls of the base should be trimmed ___
  9. Should be accurate and in ___; otherwise remake
  10. Should appear ___ and free from any ___ or ___.
A
  1. voids/nodules
  2. hard, dense; grinding sludge
  3. required areas
  4. 10-15mm thick
  5. flat
  6. articulation
  7. 2-3mm; periphery of vestibule
  8. vertical
  9. MIP
  10. clean; debris or sludge
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9
Q

Label A-D:

A

A: Face bow
B: Index/level
C: Transfer assembly
D: Orbital pointer

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10
Q

The type of facebow that we used in lab:

A

Denar Slidematic Facebow- arbitrary type

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11
Q

What is the purpose of a facebow?

A

record spatial relationship of maxillary arch to some anatomic reference point(s)

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12
Q

How do we determine the 3rd point of reference?

A

43mm from maxillary incisor incisal edge

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13
Q

The 3rd point of reference should be:

A

repeatable and reproducible

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14
Q

Label A-E:

A

A: Upper member
B: Lower member
C: Anterior/incisal pin
D: Mounting ring
E: Condylar mechanism

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15
Q

What type of articulator is an Arcon?

A

Semi-adjustable

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16
Q

Describe an Arcon semi-adjustable articulator:

A

condyles in lower member and condylar inclination in upper member

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17
Q

The purpose of an articulator is:

A

a mechanical device that simulates mandibular movements of condyles in their fossa

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18
Q

When articulating the lower cast, adjust the incisal guid pin to ____ and use:

A

0 degrees; 2-step mounting techique

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19
Q

Tooth-dependent position which is independent of condylar position:

A

maximum intercuspation (MI)

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20
Q

Describe MI:

A

maximum intercuspation: tooth dependent position, independent of condylar position

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21
Q

TMJ dependent position which is independent of tooth position:

A

Centric relation

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22
Q

Describe CR:

A

Condyles in most anterior-superior position, independent of tooth position

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23
Q

Important for deprogramming muscle of mastication to achieve and successfully record CR:

A

Anterior deprogrammer

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24
Q

Anterior deprogrammer is important for ____ to achieve and successfully record ___.

A

deprogramming muscles of mastication; CR

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25
Q

What is this device and describe the function:

A

anterior deprogrammer; important for deprogramming muscles of mastication and to achieve and successfully record CR

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26
Q

What is this device and what is the purpose?

A

Leaf gauge; finds the first point of contact in CR

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27
Q

A leafe gauge finds the ____ in ____.

A

first point of contact in CR

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28
Q

Label A-E

A

A: Functional cusp bevel
B: Retention groove
C: Axial reduction
D: Chamfer margin
E: Morphologic occlusion reduction

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29
Q

On a #19 full gold crown prep: (reductions)

A: functional cusp bevel:
B: Retention groove:
C: Axial reduction:
D: Chamfer margin:
E: Functional cusp
F: Central fossa:
G: Non-functional cusp:

A

A: 1.5 and tapers to 1.0mm
B: full depth of 170L bur
C: 0.5-1.0mm
D: 0.5mm
E: 1.5mm
F: 1.5mm
G: 1.0mm

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30
Q

The morphologic occlusion reduction includes the reduction of:

A

functional cusp, central fossa, and non-functional cusp

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31
Q

In a #19 full gold crown prep, what is reduced more, the functional or non-functional cusp?

A

functional cusp

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32
Q

What is used for the preliminary crown impression?

A

reduction index (putty matrix)

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33
Q

What is the purpose of the reduction index made from putty matrix?

A

to evaluation occlusal reduction

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34
Q

29 All ceramic crown preparation guidelines:

A: Occlusal reduction:
B: Axial reduction:
C: Occlusal convergence:
D: Cervical finish line:
E: ____ line angles
F: Occlusocervical length:

A

A: 1.5-2.0mm
B: 1.5mm
C: 6-10 degrees
D: 1.0mm
E: rounded
F: greater than 3mm

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35
Q

Posterior crown reduction criteria:

____mm margin

____mm axial

____mm occlusal

____ internal/external line angles

_____ shoulder margin design or ____

A

1.0-1.2mm margin
1.5mm axial
1.5-2.0mm occlusal

rounded internal/external line angles

modified shoulder margin design or heavy chamfer

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36
Q

A CEREC crown can be made of:

A
  1. zirconium
  2. glass ceramic
  3. ceramo-metal
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37
Q

A CEREC crown compared to a full gold crown requires:

A

More rounded and reduction of prep is needed

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38
Q

What are the steps to CEREC crown preparation?

A
  1. scan
  2. mill
  3. stain
  4. glaze
  5. fire
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39
Q

The first step in making a custom anterior guide table:

A

mix monomer (liquid) and duralay-methyl methacrylate resin (powder)

40
Q

When making a custom anterior guide table, what is the liquid, what is the powder?

A

Liqiud= monomer
powder= duralay (methyl methacrylate resin)

41
Q

When making a custom anterior guide table, the casts will be in:

A

MIP

42
Q

When making a custom anterior guide table, the upper member of articulator should:

A

open/close WITHOUT interference

43
Q

When making a custom anterior guide table, there should be a _____ of the incisal pin as it ____.

A

there should be a clear undisputed view of the incisal pin as it contacts the custom table

44
Q

When making a custom anterior guide table:

The pin SHOULD be contacting the table during:

A

exursive movements

45
Q

When making a custom anterior guide table:

The pin SHOULD be contacting the table throughout excursive movements and the anterior teeth:

A

should be in contact the movement as well

46
Q

When we waxed up crowns #6 and #8, we set the stone casts to ____ and evaluated ___ and ____.

A

MIP; right lateral excursive & protrusive

47
Q

When we waxed crowns #28, #29, and #30, we used ____ to check for interoccclusal contacts:

A

Delar Powdered Wax

48
Q

When we waxed crowns #28, #29, and #30, the Delar powdered was was used to check:

A

interocclusal contacts

49
Q

When we waxed crowns #28, #29, and #30, the stone casts were set to ___.

A

MIP

50
Q

In mandibular posterior teeth, the functional cusp is the ____, and the non-functional cusp is the ____

A

functional cusp= buccal

non-functional cusp= lingual

51
Q

When we waxed crowns #28, #29, and #30, we evaluated what movements?

A

excursive and protrusive

52
Q

When we waxed crowns #28, #29, and #30, the ML cusp of the maxillary 1st molar should contact:

A

central fossa of #30

53
Q

When we waxed crowns #28, #29, and #30, the _____ of ____ should contact the central fossa of #30

A

ML cusp of maxillary 1st molar

54
Q

One cusp occluding in three different areas of opposing tooth:

A

tripodization

55
Q

When we waxed crowns #28, #29, and #30, the distal cusp tip of #30 should contact:

A

distal fossa of maxillary 1st molar (only cusp that doesn’t to occlude with the opposing fossa)

56
Q

Shim Stock is used to evaluate:

A

occlusal contacts

57
Q

Used to evaluate occlusal contacts:

Used to evaluate where occlusal adjustments need to be made:

A

shim stock

articulating paper

58
Q

Describe ideal contacts of posterior teeth:

A

posterior teeth should have multiple, even, bilateral and simultaneous occlusal contacts

59
Q

describe ideal contacts of anterior teeth:

A

anterior teeth should have lighter occlusal contacts hen posterior teeth are in MIP

60
Q

Why should anterior teeth have lighter occlusal contacts when posterior teeth are in MIP?

A

anterior teeth are not axially loaded

61
Q

In MIP, desired outcome =

A

centric stops

62
Q

In MIP, describe desired outcome (centric stops) (3):

A

A. at least 3 maxillary and 3 mandibular posterior teeth in each quadrant are contacting

B. Most of the anterior teeth are contacting

C. Anterior teeth exhibit lighter contacts that posterior teeth

63
Q

Its recommended to adjust ____ versus _____.

A

adjust the enamel layer of maxillary lingual fossae vs. incisal edges

64
Q

Why is it recommended to adjust the enamel layer of maxillary lingual fossa vs. mandibular incisal edges whenever possible?

A

to avoid altering esthetics

65
Q

Describe working side interference during lateral excursive movements:

A

Inner inclines maxillary buccal cusps & outer inclines of mandibular buccal cusps

66
Q

Describe non-working or balance interference during lateral excursive movements:

A

Inner inclines of maxillary cusps and inner inclines of mandibular buccal cusps

67
Q

Working side interference and non-working or balancing interference occur during:

A

lateral excursive movements

68
Q

Interference during protrusive movements:

Anterior guidance should be present during ___

A

excursive movements

69
Q

During excursive movements, anterior teeth should:

A

anterior teeth should disclude the posterior teeth during excursive movements

70
Q

maxillary arch working cusps:

A

lingual cusps (6)

71
Q

maxillary arch non-working cusps:

A

buccal cusps (6)

72
Q

mandibular arch working cusps:

A

buccal cusps (7)

73
Q

mandibular arch non-working cusps:

A

lingual cusps (6)

74
Q

How many centric occlusion contacts should we have on each side in the maxillary arch

A

6

75
Q

MAX: Describe protrusive pathway:

A

from centric occlusion contact –> mesial

76
Q

MAX: Describe working pathway:

A

from centric occlusion contact —> mesial-buccal

77
Q

MAX: What side is the working side during a right lateral shift?

A

right side

78
Q

MAX: What side is the working side during a eft lateral shift?

A

left side

79
Q

MAX: Describe non-working pathway:

A

from centric occlusion —> lingual

80
Q

MAX: What side is the non-working side during a right lateral shift?

A

left side

81
Q

MAX: What side is the non-working side during a left lateral shift?

A

right side

82
Q

In the mandibular arch, how many centric occlusion contacts are present on each side?

A

5

83
Q

In the mandibular arch, describe protrusive pathway:

A

from centric occlusion contact toward distal

84
Q

In the mandibular arch, describe working pathway:

A

from centric occlusion contact –> lingual

85
Q

In the mandibular arch, what side is the working side during a right lateral shift?

A

right side

86
Q

In the mandibular arch, what side is the working side during a left lateral shift?

A

left side

87
Q

In the mandibular arch, describe non working pathway:

A

from centric occlusion contact —> out distal bucccal

88
Q

In the mandibular arch, what side is the non-working side during a right lateral shift?

A

left side

89
Q

In the mandibular arch, what side is the non-working side during a left lateral shift?

A

right side

90
Q

What is the purpose of an occlusal guard?

A

improve muscular pain conditions & protect teeth and supportive structures

91
Q

How does an occlusal guard improve muscular pain conditions?

A

by altering sensory input to CNS

92
Q

What does an occlusal guard protect teeth/supportive structures from?

A

abnormal occlusal forces

93
Q

A stabilization appliance is usually for:

A

maxillary arch

94
Q

the purpose of a stabilization appliance is to:

A

eliminate orthopedic instability between occlusal position and the joint position as well as treat muscle pain disorders

95
Q

In a stabilization appliance, the condyles will be:

A

in most stable musculoskeletal position the same time as teeth are contacting evently/simultaneously

Occlusion (5 decks)

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