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Tim's Cards > RPD II > Flashcards

RPD II Flashcards

1
Q

How is the Tx plan for an RPD pt finalized?

A

Diagnostic Assessment

*with casts

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2
Q

T/F

You might need to remove Tori surgically before making an RPD

A

True

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3
Q

What is the final mouth prep alteration done before accepting the definitive RPD design?

A

Alteration of Abutment contours

*can only be limited changes in enamel

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4
Q

How are major contour changes prior to RPD definitive design accomplished?

A

Crown

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5
Q

T/F

Rest seats are done entirely in enamel

A

True

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6
Q

T/F

Because rest seats are done entirely in enamel anesthesia is avoided so pt can tell dentist when sensitivity is felt

A

True

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7
Q

Prepare occlusal rest seats with medium round burs # ___ or # ___

A

2 or #4

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8
Q

Tooth prep sequence (3 things):

A

Guide Planes

Enameloplasty

Rest seats

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9
Q

T/F

Undercuts should be gentle when making enameloplasty

A

True

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10
Q

M/D measurement for Rest Seats:

A

2.5 mm

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11
Q

T/F

Alternative cingulum rests are smile shaped

A

True

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12
Q

For a Master Cast: How much space should be in the Custom Tray made by light cured resin?

How is this attained?

A

2 mm

Wax spacer

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13
Q

How many pounds should stone be vacuumed under?

A

27 lbs

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14
Q

In what 2 cases would you use Record Bases?

A

Not enough teeth for stable interdigitation

if mount in CR

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15
Q

T/F

Making Record Base: Blue line at vestibule depth, , adapt 15 mm strip of Triad, cut with Bard Parker knife

A

True

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16
Q

T/F

Do not remove material from the Intaglio Surface of a Record Base

A

True

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17
Q

How much space should there be between the Record Base and the opposing teeth?

A

1-2 mm

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18
Q

2 options for making a bite registration for a Record Base:

A

Notch ridge and apply PVS (Regisil), trim to cusp tips

Notch ridge and apply Aluwax, trim to cusp tips

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19
Q

Most states require lab work authorizations to be made in ______

A

Duplicate

both dentist and laboratory must keep on record for specified period

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20
Q

Cobalt - Chromium:
According to ANSI/ADA Specification 14, weight of chromium shouldn’t be less than ____%

Total weight of chromium, ____, and _____, should be no less than ______

A

20%

cobalt, nickel, 85%

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21
Q

Alloys used in RPD’s must comply with requirements to what 3 factors?

A

Toxicity

Hypersensitivity

Corrosion

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22
Q

Alloy minimum value for elongation:

Yield Strength:

Elastic modulus:

A

1.5%

500 MPa

170 GPa

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23
Q

3 elements accounting for 82 - 92% of weight for most dental restoration alloys?

A

Chromium

Cobalt

Nickel

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24
Q

T/F

Chromium, Cobalt, and Nickel have relatively little effect on alloy properties

A

True

*properties determined by carbon, molybdenum, beryllium, tungsten, and aluminum

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25
Q

When Chromium content is above ___%, the alloy is difficult to cast and forms a ____ phase

A

30%

brittle

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26
Q

Of the 3 main elements in RPD alloy, which 2 are interchangeable?

Which one increases elastic modulus, strength, and hardness a little more?

A

Cobalt and Nickel

Cobalt

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27
Q

T/F

Increasing Carbon content is a good way to increase hardness of alloy

A

True

.2% change can make alloy unusable

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28
Q

T/F

Molybdenum decreases strength of alloy

A

False

*increases

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29
Q

What incorporates a curved, arcuate, or variable path of placement allowing one or more of the rigid components of the framework to gain access to and engage an undercut?

A

Rotational Path RPD

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30
Q

3 Categories of Rotational Path RPD’s

A

Posterior to Anterior

Anterior to Posterior

Lateral to Lateral

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31
Q

When is the Altered Cast Method for impression making often used?

A

Mandibular distal extension arch forms

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32
Q

What procedure compensates for greater soft tissue displacement of the Mandible and is seldom used in the Maxilla?

A

Altered Cast

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33
Q

The goal of the Altered Cast is to more accurately record the soft tissues with a _______ impression

A

second

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34
Q

Gingival stippers, flippers, muco-adhesion RPD’s aks…

A

Provisional RPDs

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35
Q

Patrix into Matrix is an example of what?

A

Attachment Retained RPD

**precision attachment

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36
Q

In a precision Attachment Retained RPD, where is the receptacle usually located?

Fitting part?

A

Crown of Abutment tooth (matrix)

Pontic or Denture framework (patrix)

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37
Q

Matrix and Patrix can be switched in Extracoronal Locator Attachment

A

True

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38
Q

A Master Cast or Diagnostic Cast should have a minimum cross section of ___ to ____ mm through its narrowest section

A

10-12mm

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39
Q

T/F

Preprosthetic surgery includes removal of gross bony undercuts, enlarged tuberosities, large tori

A

True

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40
Q

If there is inflammation/irritation, distortion of anatomic features (rugae, etc) or a burning sensation of ridges, tongue, cheeks, lips - what is needed?

A

Conditioning of Abused/Irritated tissues

*remove insult, adjust denture

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41
Q

What are 3 preps for Abutment Teeth?

A

Enameloplasty

Existing restoration

New restoration (Survey Crown)

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42
Q

Class III guide planes should be how tall?

Class I or II?

A

2-4 mm

1.5-2 mm

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43
Q

Tooth prep sequence on Enamel/Existing Restorations:

4 steps

A

Prep guide planes

Modify contours

Alginate

Rest seat prep

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44
Q

When should the need for crowns on abutment teeth for RPD’s be established?

A

Diagnosis/Tx planning phase

45
Q

Extensive caries, heavily restored teeth, ______ treated teeth, recontouring, ______, and intra or extra _____ attachments

All are indications for Survey Crowns:

A

Endodontically

Splinting

Coronal

46
Q

Patrix to Matrix intracoronal attachment must have enough ______ on the survey crown

A

Occlusal space

47
Q

RPD survey crown sequence of tooth prep:

4 steps

A

Prox/lingual guiding planes

Proximal box

Final prep

Full arch impressions

48
Q

T/F

Take a Survey Crown with a Triple Tray

A

False

***Full Arch Impression (never triple tray)

49
Q

RPD Survey Crown wax pattern formation (5 steps):

A

Guiding plane

Retentive undercut

Reciprocating arm

Rest seat

Cutback for PFM

50
Q

How deep should rest seats be on a Survey Crown?

Survey Crown embrasure Rest Seat depth?

A

1.5 mm

2 mm

51
Q

Prior to cementation what should be done to a Survey Crown?

A

Survey

52
Q

What are the 2 reasons to use a Custom Tray for Final RPD Impressions?

A

Increases accuracy (less tissue displacement)

Lowers cost (less matl used)

53
Q

Shaping the border of a custom tray by manipulating the tissues adjacent to the borders to duplicate the contour and size of the vestibule:

A

Border Molding

54
Q

Metal Alloys must meet what 5 criteria for RPD’s?

A

Biocompatible

Biologically inert

Versatile (castability)

Rigidity

Resilient (proper give/flex)

55
Q

Type IV gold (extra hard):

Low gold:

A

75% or greater Au and Pt

less than 75% Au and Pt

56
Q

Cobalt Chromium %’s

***most common

A

60% cobalt

30% chromium

5% molybdenum

57
Q

Nickel Chromium %’s

*less common

A

65% nickel

16% chromium

9% Molybdenum

58
Q

T/F

Nickel Chromium is more common than Cobalt Chromium

A

False

59
Q

What increases strength, hardness, and casting temp?

What increases ductility, decreases strength and casting temp?

What increases corrosion resistance?

A

Cobalt

Nickel

Chromium

60
Q

3 advantages to Base Metal Allow vs Gold:

2 advantages:

A

Decrease weight, cost, Increase corrosion resistance

casting technique, clasp adjustability

61
Q

T/F

Gold must be thicker to achieve same rigidity and therefore has more bulk in pts mouth

A

True

62
Q

The addition of what will cause the Framework or an RPD to seat tighter and prevent food impaction?

A

Bead lines

63
Q

3 Types of Block Out:

A

Shaped (follows contour)

Parallel (guide planes)

Arbitrary (undercuts could be anywhere)

64
Q

To make a Framework, you make a _____ cast from a duplicate master cast, wax up, add _____ and Invest with ______

(then burn out the wax pattern and cast framework)

A

Refractory

Sprue

Ethyl Silicate

65
Q

The Ethyl Silicate Investment is removed from the casted framework with what?

A

sand blaster

66
Q

T/F

The framework can be electrolytically polished

A

True

67
Q

T/F

You can section and solder a frame that isn’t fitting correctly

A

True

68
Q

What is the step after fabrication?

A

Try in

*must be passive fit

69
Q

If the impression is distorted, the framework will not fit ______

A

Passively

70
Q

3 Types of Indicating Medium for Framework Insertion/Adjustment:

A

Aerosol spray (doesn’t convey distance)

Disclosing Wax (conveys distance)

Silicone (Fit Checker - expensive)

71
Q

T/F

With opposing frameworks, adjust the arches together

A

False

**individually, then together

72
Q

Show through means you have what?

A

Incompletely seated framework

73
Q

A negative likeness of a portion/portions of edentulous denture bearing areas made independent of and after the initial impression of natural teeth - employs impression tray attached to RPD framework.

A

Altered Cast Impression

74
Q

An Altered Cast Impression must capture what 2 things?

How?

A

Anatomic Ridge Form - frame impression

Functional/Supporting Ridge Form - selective pressure

75
Q

A custom tray should be ___ mm short of the vestibule

A

2-3 mm

76
Q

An Altered Cast gives you ______, not ______ of the Edentulous Ridge

A

Functional form

Anatomical form

77
Q

An Occlusal Record is taken with what?

A

Record Base and Wax Occlusal Rim

78
Q

The final record in the Record Base/Wax Occlusal Rim should have how much separation from wax to teeth?

A

1-2 mm

79
Q

Complete Natural Dentition has what type of Occlusion?

Partial Edentulism?

Complete Edentulism?

A

MIP

MIP or MIP=CR

MIP=CR

80
Q

The best fit for the teeth regardless of Condylar Position:

A

MIP

81
Q

CR:

A

superior/anterior position of condyle

82
Q

You should always mount the occlusal relationship by considering which arch?

A

Weaker

83
Q

Tooth borne RPD vs Natural Dentition:

Tooth borne RPD vs Complete Denture

Tooth mucosa RPD vs Natural Dentition

Tooth mucosa RPD vs Complete Denture

Tooth mucosa RPD vs Tooth mucosa RPD

A

MIP

CR (balanced occlusion)

MIP

CR

CR

84
Q

CR should be in Balanced Occlusion in _____ positions while MIP should provide working side contacts in what positions?

Eliminate what interferences?

A

Eccentric

Eccentric

Excursive

85
Q

3 methods to establish occlusal relationships:

A

Hand articulate

Interocclusal reg

Record bases w/ interocclusal reg

86
Q

What denture tooth material is most often used?

What isn’t used any more?

A

Acrylic resin

Porcelain

87
Q

Replacement teeth should oppose natural teeth with minimal wear and what tooth form?

A

22 or 33 degree cuspal inclination

88
Q

External finish line:

Internal finish line:

A

undercut

butt joint (90 degrees)

89
Q

RPD acrylic resin added how?

A

Wax up, invest, burnout, acrylic resin mixed, adapted

90
Q

3 steps in delivery of RPD:

A

Denture base fit

Correct occlusion

Adjust retentive clasps

91
Q

How is the Intaglio of the denture base checked?

A

Same direction PIP

pressure indicating paste

92
Q

What 2 materials are used to detect pressure spots in an RPD?

Where are they used?

A

PIP for Intaglio

Disclosing wax for edges of denture borders

93
Q

What should you do if there are large occlusal discrepancies?

A

Clinical Remount

94
Q

Adjust Clasp with Bird Beak, what technique?

Adjust Clasp with Three Prong, what technique?

A

hold pliers and move frame

squeeze gently

95
Q

2 reasons not to use bleach:

A

pores on acrylic resin

corrode metal

96
Q

3 post delivery adjustment time scale:

A

24 hours

72 hours

1 week

97
Q

After 24 hour, 72 hour, and 1 week adjustments to RPD’s, what is the recall schedule after that?

A

6 month hygiene

annual periodic (clinical/radiographic)

98
Q

Resurfacing the tissue side of RPD w/ new base matl

A

Reline

99
Q

Lab process of replacing entire denture base matl on existing prosthesis

A

Rebase

100
Q

2 Types of Reline:

A

Direct

Indirect

101
Q

T/F

Denture base repair by opening up, repair resin, cure in vacuum

A

True

102
Q

RPD designed for esthetics, stabilization/function used for limited time
(often used to assist determination of therapeutic effectiveness prior to definitive prosthesis)

A

Interim RPD

103
Q

Interim RPD that adds artificial teeth upon loss of natural teeth

A

Transitional RPD

104
Q

Prosthesis to treat/condition tissues

placed in prep for future therapy

A

Treatment RPD

105
Q

Examination and Diagnosis

Survey/design of diagnostic casts

Tx plan

Mouth prep

Final impressions

Survey/design master casts

Work authorization form

A

RPD Tx sequence

106
Q

Framework try-in

Altered cast impression

Record bases

JRR

Esthetic tooth try in

Processing

Lab remount

A

RPD Tx sequence

107
Q

Finish/polish

Clinical remount at delivery

Post op instructions

Post delivery adjustment

A

RPD Tx sequence

108
Q

the distal extension should go how far onto the Retromolar Pad?

A

1-2 mm

109
Q

Clean once a day

Remove at night

No bleach

A

RPD post op instructions

Tim's Cards (140 decks)

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