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Prostho II > RPDs > Flashcards

RPDs Flashcards

1
Q

What is a removable partial denture?

A

Replaces some teeth in a partially dentate arch

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2
Q

What is another name for a removable partial denture?

A

Partial removable dental prosthesis

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3
Q

What sometimes implies the need for treatment with RPD?

A
  • tooth loss

- subsequent alveolar bone loss

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4
Q

What is the final aim of and RPD?

A

functional and esthetic rehabilitation

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5
Q

The fewer teeth that are missing, the more suitable a ______ denture is

A

fixed partial

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6
Q

The more teeth that are missing, the more suitable a ____ is

A

RPD

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7
Q

Besides number of teeth missing, these must be considered for an RPD… (5)

A
  • Bone loss (residual ridge volume)
  • Location of remaining teeth
  • Condition of remaining teeth
  • length of edentulous areas
  • intermaxillary relationship
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8
Q

RPD classifications? (3)

A
  • Tooth supported
  • Tissue supported
  • Tooth and tissue supported
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9
Q

Tooth supported denture: support and retention is where?

A

lays over teeth

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10
Q

Tooth supported denture: edentulous areas?

A

bounded

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11
Q

Tooth supported denture: Kennedys class?

A

III & IV

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12
Q

Tooth supported denture: better alternative?

A

fixed partial denture

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13
Q

Tooth supported denture: indications? (2)

A
  • long edentulous areas
  • periodontially damaged teeth
  • if da patient POOR
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14
Q

Tissue supported dentures: support?

A

soft tissues

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15
Q

Tissue supported dentures: designed with? (3)

A
  • large major connectors
  • wrought wire clasps
  • extended bases
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16
Q

Tissue supported dentures: more frequently on mandible or maxilla?

A

mandible

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17
Q

Tissue supported dentures: indications? (2)

A
  • few remaining teeth

- periodontically damaged

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18
Q

Tissue supported dentures: Ideal abutment teeth? (2)

A
  • 4 symmetrical

- canines and 2nd molars

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19
Q

Tissue supported dentures: Other favorable abutment teeth arrangements? why? (2)

A
  • 2 symmetrical abutment teeth (ex. 2 canines or 2 premolars)
  • allows extended bases in front and behind abutment teeth
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20
Q

Tissue supported dentures: Which teeth do not make sense preserving?

A

-incisors or 3rd molars

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21
Q

Tooth and tissue supported denture: Kennedys class?

A

I-!V

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22
Q

What si the most frequent type of RPD?

A

tooth and tissue supported denture

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23
Q

What is the most complex type of RPD?

A

tooth and tissue supported denture

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24
Q

Tooth and tissue supported denture: No possibility of placing a FPD occurs in which kennedys class? (2)

A

I & II

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25
Q

Tooth and tissue supported denture: Kennedys class III design and teeth? (2)

A
  • Designed determined by quality of abutment teeth and length of edentulous area
  • at weak teeth : no occlusal rest
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26
Q

Tooth and tissue supported denture: Kennedys class IV with three incisors missing?

A

better to make FPD

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27
Q

Tooth and tissue supported denture: KEnnedys class IV with 4 incisors missing OR 3 incisors and a canine?

A

better to make FPD

28
Q

Tooth and tissue supported denture: KEnnedys class IV 4 incisors and a canine missing

A

better to make a RPD

29
Q

RPDs restore/ preserve… (4)

A
  • esthetics
  • phonetics
  • proximal contact points (only preserve)
  • VD
30
Q

RPDs improve…

A

masticatory efficiency

31
Q

RPDs prevent… (3)

A
  • migration
  • rotation
  • extrusion
32
Q

RPDs bear…

A

adequate forces tot he supporting tissues to preserve them

33
Q

What is a major connector for an RPD?

A

part of the RPD that joins components on opposite sides of the arch

34
Q

Components major connectors: rigidity?

A

rigid and doesn’t bend through mastication

35
Q

If a components major connector is more than 6mm wide it is considered…

A

a plate

36
Q

If a components major connector is less than 6mm wide it is considered…

A

a bar

37
Q

Types of maxillary major connectors? (8)

A
  • palatal plate
  • middle palatal plate (palatal strap)
  • middle posterior palatal plate
  • Complete palatal plate (complete palatal coverage)
  • U-shaped or anterior palatal plate
  • antero-posterior palatal palte
  • antero-posterior palatal bar
  • posterior palatal bar
38
Q

Types of mandible major connectors? (2)

A
  • lingual bar

- double lingual bar (or lingual bar with continuous bar indirect retainer)

39
Q

Major connector materials ? (3)

A
  • metal (usally Co-Cr alloy)
  • acrylic resin
  • both
40
Q

What is a minor connector?

A

connects the major connector /base of RPD and other units (ex. clasp assembly, indirect retainers, occlusal rests, cingulum rests, proximal plates)

41
Q

What is the function of a minor connector?

A

distribute functional load, mainly from major connector to abutment teeth

42
Q

What is a proximal plate?

A

-match guiding planes prepared over abutment teeth

43
Q

Function of proximal plates? (4)

A
  • limit and guide the insertion and removal of the denture
  • improve stability
  • reciprocation
  • reduce embrasures
44
Q

What is an occlusal rest?

A
  • rigid extension of a RPD

- contacts occlusal surface of tooth/restoration, occlusal surface of which may have been prepared to recieve it

45
Q

What is an incisal rest?

A
  • rigid extension of RPD that contacts a tooth at the incisal edge
46
Q

Incisal rest and vertical forces?

A

neutralize vertical forces that tend to embed the denture over supproting tissues

47
Q

Incisal rest and horizontal forces?

A

They oppose horizontal forces

48
Q

What is a direct retainer? (2)

A
  • Used to retain and prevent dislodgement

- consists of a clasp assembly or precision attachment

49
Q

Types of retainers? (2)

A

Direct

indirect

50
Q

Types of direct retainers? (2)

A
  • Clasp assemblies

- Friction retainers (attachments)

51
Q

Types of direct retainer with clasp assemblies? (2)

A
  • Cast retainer

- Wrought wire retainers

52
Q

Types of direct retainer with clasp assemblies with cast retainers? (2)

A
  • Circumferential retainers

- Bar or contact point retainers

53
Q

Types of (Direct) circumferential retainers?(10)

A
  • Akers or ney’s n.1
  • REverse akers clasp
  • ring
  • double akers (bonwill)
  • C clas/hair-pin
  • Buch & Carmona
  • Single-continuous arm clasp
  • Nally-martinet
  • Posterior action
  • Multiple clasp
54
Q

Types of (Direct) bar or contact point retainers? (3)

A
  • Roach ( I, T, Y)
  • RPI
  • RPA
55
Q

Circumferential retainers consist of? (4)

A
  • Occlusal rest
  • Body
  • Reciprocal arm
  • Retentive arm
56
Q

The retentive arm is composed of? (2)

A
  • Rigid part above the survey line

- flexible part below survey line

57
Q

What is an indirect retainer?

A

Assists the direct retainer in preventing displacement of the distal extension of denture base

58
Q

How does a indirect retainer function?

A

Through levelr action on the opposite side of the fulcrum line when the denture base moves away from the tissues in pure rotation about the fulcrum line

59
Q

Indirect retainers used in what type of denture?

A

tooth and tissue supported

60
Q

Indirect retainers prevent…?

A

The posterior part of the denture from dislodging

61
Q

Indirect retainers stability?

A

Horizontal and vertical

62
Q

Indirect retainer types? (3)

A
  • Occlusal rest
  • Incisal rest
  • Continuous lingual arm
63
Q

What is a base? (2)

A
  • Supports the artificial teeth

- rests on the foundation tissues and replaces the alveolar structures and gingival tissues

64
Q

Base extension depends on?

A

Kind of support of the denture

65
Q

Base can be made of? (3)

A
  • Metal
  • Acrylic resin
  • Acrylic resin with metallic mesh framework

Prostho II (12 decks)

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