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Tim's Cards > RPD Test1 > Flashcards

RPD Test1 Flashcards

1
Q

3 types of RPD’s:

A

Tooth borne

Tooth-mucosa borne

Implant-assisted

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2
Q

Clasp-Retained RPD’s: Resistance to vertical dislodging forces:

Resistance to lateral, torsional, horizontal forces:

Resistance to vertical seating forces:

A

Retention

Stability (Bracing)

Support

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3
Q

A tooth, a portion of a tooth, or that portion of a tooth or of a dental implant that serves to STABILIZE or retain a prosthesis:

A

Abutment

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4
Q

Any type of device used for the stabilization or retention of a prosthesis:

A

Retainer

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5
Q

6 advantages of RPD vs FPD:

A

Abutment teeth may not require restoration (more conservative)

Better OH

Cross-arch stabilization

Reduced Fees

More esthetic (sometimes - if clasps not visible )

Replace bony & soft tissue contours

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6
Q

Implants can be used for Distal Support by placing as posteriorly as possible - this refers to _____ forces

A

Downward

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7
Q

Support is gained by the most ______ placement possible

Retention is gained by the most ______ placement possible

A

posterior

anterior

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8
Q

Treatment sequence (4 part):

A

Examination

Diagnosis

Treatment Plan

Treatment

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9
Q

Hypersensitivity, mobility, and soft tissues are all part of what in the Treatment sequence?

A

Examination

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10
Q

T/F

Examination phase includes radiographs

A

True

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11
Q

4 things looking for in Radiographic Examination:

A

Pathology

Caries

Quantity of bone

Quality of bone

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12
Q

In the Diagnosis/Tx planning phases, what 7 things can you do with Mounted Diagnostic Casts:

A

Preliminary Design

Tx Sequence

Path of Placement

Unfavorable tooth position, contours, inclinations

Embrasure clearance

Occlusion/articulation

Interarch distance

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13
Q

The component of a RPD used to retain and prevent dislodgment - consists of clasp assembly or precision attachment

A

Direct Retainer

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14
Q

What partially encompasses or contacts the abutment tooth - acts as a direct retainer?

A

Clasp Assembly

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15
Q

What portion of the Clasp Assembly in stabilizing and retaining the RPD

A

Clasp

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16
Q

What are the 3 parts of a Clasp Assembly?

A

Rest

Retention

Reciprocation

(latter 2 are the Clasp)

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17
Q

Plates or Bars - connects one side to the other

Smaller portion connects to clasps or rests:

A

Major Connector

Minor Connector

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18
Q

RPD component functioning through a lever action:

A

Indirect Retainer

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19
Q

What area of an RPD connects the resin base and can be open lattice or mesh:

A

Plastic retention (Denture base) area

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20
Q

Most posterior portion of an open lattice w/ no posterior teeth in an RPD

A

Tissue stop

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21
Q

The location of the Fulcrum Line is criteria for selection of the Maxillary Major Connector

A

True

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22
Q

Maxillary Major Connector has to be ___mm from gingival margins

If less, use what type of design?

A

6mm

Plate type design

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23
Q

The Maxillary Major connector’s anterior borders must follow what?

The posterior borders end where?

A

Valleys of Rugae

Hard palate - do NOT extend onto soft palate

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24
Q

What type of Maxillary Major connector is used with questionable teeth?

A

Plate type design

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25
Q

5 types of Maxillary Major Connectors:

A

Anterior palatal strap

Posterior palatal strap

Ateroposterior palatal strap

Modified palatal plate

Complete palatal plate

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26
Q

Location of edentulous area, functional depth of lingual vestibule, anticipated loss of natural teeth, inclination of remaining teeth - all are criteria selection for what?

A

Mandibular Major Connector

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27
Q

How deep does the Lingual Vestibule need to be for a Mandibular Major Connector?

A

7mm

3mm from tooth, 4mm of connector

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28
Q

If 3mm from gingival margins cannot be obtained for a Mandibular Major Connector (for total of 7mm), what type of designs should be used?

A

Plate type designs

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29
Q

Metal of the surface of ______ is highly polished

on _____ isn’ t highly polished

A

Mandibular Major Connector

Maxillary

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30
Q

The portion of a dental prosthesis (RPD) that is reduced to eliminate excessive pressure:

A

Relief Area

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31
Q

Name 2 types of RPD:

A

Tooth borne

Tooth-mucosa borne

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32
Q

4 types of Mandibular Major Connectors:

A

Lingual bar

Sublingual bar

Lingual plate

Labial bar

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33
Q

2 requirements for a Minor Connector:

A

Rigid

Max exposure (must not impinge on marginal gingival tissues)

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34
Q

How thick should the Minor Connector-Rest Junction be?

A

1.5mm

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35
Q

The Minor Connector should be located __mm from other vertical components

A

5mm

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36
Q

4 components of a Clasp Assembly:

A

Clasp

Reciprocal Clasp

Cingulum

Rest

Minor connector

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37
Q

3 types of Rests:

A

Cingulum

Incisal

Occlusal

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38
Q

2 components of a Clasp:

A

Retentive component

Bracing (stabilizing) component

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39
Q

What side of the Clasp engages the Undercut?

What side doesn’t?

A

Retentive

Bracing

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40
Q

T/F

Encirclement (180 at least) and Passivity are requirements of Clasps

A

True

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41
Q

3 Clasp Categories:

A

Suprabulge - cast circumferential

Infrabulge - cast bar

Combo

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42
Q

3 types of Suprabulge (circumferential) Clasps:

A

Cast circlet (Akers)

Embrasure

RPC (RPA)

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43
Q

2 types of Bar (Infrabulge) clasps:

A

RII

RPI

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44
Q

T/F

Rests are a type of Indirect Retainer

A

True

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45
Q

3 types of Indirect Retainers:

A

Rests

Minor connectors/proximal plates

Lingual plate major connector

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46
Q

If you have a Clasp, you need a _____

A

Rest

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47
Q

T/F

RPD clasp needs a rest otherwise would move in a cervical direction and cause trauma

A

True

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48
Q

A Rest directs forces where?

A

Long axis of tooth

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49
Q

Rest dimension should be ____ faciolingual width of tooth

Marginal ridge reduced ___ mm

(__mm if using Gold)

A

1/3

  1. 5 mm
  2. 0 mm
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50
Q

The angle of the minor connector and the rest should be ____

A

less than 90 degrees

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51
Q

2 adjacent occlusal rest seats form what?

A

Embrasure clasps

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52
Q

What type of Rest Seat is saddle shaped, has a potentially objectionable metal display, and has greater mechanical advantage than lingual rest seats?

A

Incisal rest seats

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53
Q

Type of rest seat w/ inverted U/V that may require use of restoration to establish

A

Cingulum

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54
Q

What Rest seat is placed in the mesial or distal half o fthe tooth at the junction of the middle and gingival one third?

A

Ball

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55
Q

Rest Seat prep sequence:

A

Guiding plane

Rest seat

smooth/polish

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56
Q

2 types of denture bases that contact mucosa:

A

Resin on metal

metal

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57
Q

What type of RPD has an internal finish line of the metal component?

A

Maxillary (tooth or tooth-mucosa borne)

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58
Q

If Internal/External finish line, External should be ____

Internal should be ____

A

less than 90 degrees

90 degrees

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59
Q

T/F

Use a metal denture base for max strength and when relining is not anticipated

A

True

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60
Q

T/F

A surveyor can be used to evaluate esthetics

A

True

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61
Q

T/F

The height of contour and the survey line are the same

A

False

*different if tilt

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62
Q

T/F
RPD should help to eliminate oral disease, preserve what remains, restore function and esthetics and not interfere with patients speech

A

True

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63
Q

What teeth are lost first?

Which tend to be last?

A

Posteriors

Mandibular anteriors

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64
Q

Resistance to removal from the tissues or teeth

A

Retention

65
Q

Resistance to movement in a horizontal direction

A

Stability

66
Q

Resistance to movement towards the tissues or teeth

A

Support

67
Q

A tooth that supports a partial denture

A

Abutment

68
Q

A component of a partial denture that provides both retention and support for the partial denture

A

Retainer

69
Q

Angle viewed between a vertical rod contacting an abutment tooth and the axial surface of the abutment cervical to the height of contour

A

Angle of Cervical Convergence

70
Q

A Palatal Major Connector is greater than ____mm in width

Palatal Bar is less than __mm in width

A

8mm

8mm

71
Q

Vertically parallel surfaces of abutment teeth shaped to direct a prosthesis during placement/removal

A

Guiding Planes

72
Q

Functional Impression vs. Static Form

A

Harder vs softer matl.

*records in function vs. not supporting a functional load

73
Q

Simultaneous contact of both maxillary and mandibular teeth

A

Balanced Occlusion

74
Q

Dynamic registration of opposing dentition

A

Functional Occlusal Registration

75
Q

More than relining - replacement of the entire denture base w/o changing occlusion

A

Rebasing

76
Q

Resurfacing of denture base with new matl to make it fit the underlying tissue more accurately

A

Relining

77
Q

RPD component used to retain or prevent dislodgment (consists of clasp assembly or precision attachment)

A

Direct Retainer

78
Q

RPD part that assists in preventing vertical displacement of distal extension via lever over fulcrum

A

Indirect Retainer

79
Q

Clasp Assemblies partially encompass of contact the ______

A

Abutment

80
Q

2 types of clasp arms that terminate in the undercut

A

Bar Clasp (comes off denture framework)

Circumferential

81
Q

Clasp arms operate by friction

A

False

82
Q

Resists movement away from tissue:

Resists lateral movement:

Resists movement toward tissue:

A

Retention

Stability

Support

83
Q

4 Tx objectives for RPD’s

A

Eliminate disease

Preserve remaining teeth and supporting structures

Restore/improve mastication esthetics and phonetics

Restore health, comfort, quality of life

84
Q

5 phases of the Problem List

A

Urgent

Control

Re-evaluation

Definitive

Maintenance

85
Q

Major connectors must be ______

A

Rigid

86
Q

3 Functions of the Major Connector:

A

Unification

Stress Distribution

Cross-Arch Stabilization (Counterleverage)

87
Q

T/F

Major connectors should be placed as far from the FGM as possible and practical

A

True

88
Q

What 2 soft tissue areas are of utmost concern when designing a Major Connector

A

Moveable part of Mx Soft Palate

Mb lingual frenum

89
Q

Major connectors in the upper arch should terminate ___mm or more from the gingival crest tissues

A

6mm

90
Q

What Maxillary design is circular and especially useful in cases with a torus

A

Anterior-Posterior Palatal Strap

*If less than 8mm, Palatal Bar

91
Q

3 cases to use a Full Palatal Plate:

A

Long distal extension

6 or less Ant. teeth

Primary abutments periodontically involved

92
Q

When to use a Palatal Bar?

A

When no other option viable

*usually too much bulk

93
Q

What type of connector is poor from a biomechanical standpoint and shouldn’t be used unless absolutely necessary?

*Tori prevents use of other connectors

A

Palatal Horseshoe Plate

94
Q

Maxillary Major connectors should be how far away from the FGM?

Mandibular Major connectors should be how far away from the FGM?

If this distance isn’t possible in either arch, where should the border of the connector be?

A

6 mm

3 mm

On teeth

95
Q

The most commonly used Mandibular Major Connector:

A

Lingual bar

96
Q

A Lingual Bar (Mandibular) requires a vestibule how deep?

Flat on the tissue side, ____ on the tongue

Occluso-gingival width of ____to____ mm

Thickness of ____to_____mm

A

7-8 mm or more

convex

4 - 6 mm

1.5 - 2 mm

97
Q

A Lingual Bar with extension over the cingula of Anterior Teeth:

  • most often used when there is less than 3mm from the FGM
  • can be contraindicated by mobile teeth (perio)
A

Lingual Plate

98
Q

Lingual bar + secondary bar on cingula (mandibular):

*not recommended

A

Continuous Bar Retainer (Kennedy Bar, Double Lingual Bar)

99
Q

T/F

Indications for a Mandibular Labial Bar are extremely rare and may include severe lingual inclination of the teeth

A

True

100
Q

2 Types of gridwork minor connectors connecting denture base and teeth to the major connectors:

A

Open Lattice - can interfere if too thick

Mesh - less retention of acrylic

101
Q

Relief under the Gridwork should start how far away from the tooth?

*metal wears less, better hygiene next to tooth

A

1.5 - 2 mm

102
Q

Junction of Gridwork to major connector is a Butt joint with relief so must be at what angle?

A

Acute

103
Q

Mandibular Gridwork should extend ____ the way from abutment to the retromolar pad

It should NOT extend where?

A

2/3

Ascending portion of the pad

104
Q

Maxillary gridwork extension to Hamular notch:

A

2/3

105
Q

Major connector should be at least __mm away from imaginary line of teeth

A

2mm

106
Q

T/F

A tissue stop is an extension of metal through the framework contacting the ridge

A

True

107
Q

What contacts guide planes (a type of minor connector)?

A

Proximal Plates

108
Q

T/F

Guide plates can’t be in undercut so wax is used to create zero degree blockout

A

True

109
Q

4 parts, extra-coronal direct retainer:

A

retentive arm

reciprocal (bracing) arm

rest

minor connector

110
Q

T/F

Retention should be uniform (undercuts should be the same measurement e.g. 0.1)

A

True

111
Q

T/F

The clasp arm engaging the undercut should be flexible

A

True f

112
Q

What type of clasp is used for Kennedy Class III’s?

A

Cast Circumferential (Circlet/Akers)

113
Q

Wha is the clasp of choice in tooth-borne cases?

A

Cast Circumferential (Circlet/Akers)

114
Q

Cast Circumferential has a ______-bulge bracing (reciprocal) arm that is thicker and located in the _____ 1/3 of the tooth

the _____-bulge retentive arm is in the ____ 1/3 of the tooth

A

Suprabulge, Middle 1/3

Infrabulge, Gingival 1/3

115
Q

A double Akers Clasp, aka…

A

Embrasure Clasp

116
Q

3 Stress-Releasing clasp assemblies for Class I and II RPD’s

A

RPI (bar clasp w/ mesial rest)

RPA

Combo

117
Q

Rests should be in contact with the adjacent teeth

A

False

118
Q

The proximal plate in an I-bar construction should be ___mm thick
(the I-bar itself comes off of the gridwork)

A

1 mm

119
Q

A combination clasp has what shape wire?

A

Round (flexible)

120
Q

Cast Circumferential clasps are used for every class except?

Indirect Retainers are used for every Class except?

A

Class I

Class III

121
Q

Indirect Retainers should be placed where?

A

As far as possible from distal extension base

BUT, incisors often not strong enough, so furthest Canine/Premolar

122
Q

T/F

Indirect retainers are auxiliary cingulum rests or occlusal rests, not bar retainers or lingual plates

A

True

123
Q

The struts of an Open Lattice in the Mb and Mx are _____ wide (the struts themselves)

The distance between struts is 5-7 mm for premolars and ____ for molars (Mb and Mx)

A

1.5-2.0 mm

7-10 mm

124
Q

T/F

The Flange should generally be shortened rather than extended to adapt mucosa

A

True

125
Q

T/F
Denture bases should have internal/external finish lines that do not coincide and are acute

The external metal finish line should end 2mm lingual to replacement teeth

A

True

True

126
Q

Occlusal rests for molars and Mx premolars are ____ the facio-lingual tooth width or ___ the inter-cusp width.

____ the mesio-distal tooth length

A

1/3

1/2

1/4-1/3

127
Q

The marginal ridge must be lowered ___to ____ mm to allow sufficient bulk of metal

A

1 to 1.5 mm

128
Q

Deepest occlusal portion of a rest should be ____ mm and angle of rest should be ACUTE

A

1.5 mm

129
Q

A positive rest seat is _____

If not positive work is done by ______

A

Acute

Incline Plane

130
Q

If a rest is prepared next to an existing tooth the seat is flared which direction?

A

Lingually

*don’t want to impinge marginal ridge

131
Q

Embrasure occlusal rests have additional marginal ridge reduction to ______

A

1.5 mm

132
Q

Lingual rest seats (cingulum) are used for what 2 situations?

A

No posterior teeth available

Indirect retention

133
Q

Cingulum rests are an inverted V or U and broadest in the middle, measuring ____ mm F/L in a Positive Rest Seat

M/D length is ____

A

1 mm

2.5 - 3 mm

134
Q

A guide plane in Tooth Supported Segments should be ___ to ___ mm in height

in Distal Extension should be __ to ___ mm in height

A

2 to 4 mm

1.5 to 2.0 mm

135
Q

What RPD is tooth borne with little, if any, soft tissue support?

A

Class III

136
Q

T/F

Class III RPD’s generally do not rotate and no compensation for rotational forces is needed

A

True

137
Q

T/F

Class III RPD’s preferred base is acrylic b/c relining an issue

A

False

*metal preferred, lining not an issue b/c tooth-borne

138
Q

T/F

Three is a Fulcrum Line in Class III RPD’s

A

False

139
Q

T/F

The indirect retention in a Class IV is posterior

A

True

140
Q

T/F

Use a cutting tool to construct guide planes on proximal surfaces using Surveyor

A

True

141
Q

3 planes of rotation:

A

Sagittal

Horizontal

Frontal

142
Q

What Classes are partially tooth and partially tissue supported?

A

I, II, and IV

143
Q

T/F

Soft tissue is 250x more depressable than hard tissue

A

True

144
Q

1st class Lever like a:

2nd class:

3rd class:

A

teeter totter

wheel barrow (fulcrum at wheel)

fishing rod (fulcrum at hand)

145
Q

Distal extension RPD has distal rest on distal abutment, what Class Lever is created?

A

Class I (Pry bar effect extracts tooth)

Retainer at junction of middle/cervical 1/3’s

146
Q

What 6 Methods can decrease the effect of Class I Lever acting on a distal extension RPD?

A

Retention/Retainer

RPI/RPA retainer

Wire clasps

Extended Soft Tissue Bases

Indirect Retainers

Make sure occlusal forces directed in long axis

147
Q

Maxillary Major connector provides ______ and is Polished

Mandibular Major connector doesn’t provide _____ and is NOT polished

A

Support

Support

148
Q

In Hernandez review, anything beyond ___mm is more of a Plate than a Strap

A

12 mm

*but actually 8, no?

149
Q

Polish what surface of a Mandibular Bar?

A

Intaglio

150
Q

What is the ideal undercut for a Rigid Component?

A

.010

151
Q

180 circumference, Retention, Bracing, Support, Reciprocation, Encirclement, Passivity are all requirements of what?

A

Clasp

152
Q

A complete circle flexes in what direction?

Wrought wire semi circle flexes in how many directions?

A

all

2

153
Q

3 types of Suprabulge clasps:

A

Cast circlet (Akers)

Embrasure

RPC (RPA)

154
Q

Rest seat prep sequence:

3 steps

A

Guide planes

Rest seats

polish

155
Q

A Mesial rest disengages ____ and _____

A

apically

mesially

156
Q

An I-bar should be placed where buccally?

A

mid to mesial

157
Q

When would you NOT use a positive rest?

A

Wrought wire clasp

*Flat pulpal floor, circumferential wire around tooth

158
Q

A cingulum rest should be positive

A

True

159
Q

4 types of rests:

A

Occlusal

Incisal

Cingulum

Ball

Tim's Cards (140 decks)

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