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Removable Partial Dentures > RPD Insertion > Flashcards

RPD Insertion Flashcards

1
Q

what is the objective of the insertion appointment

A
  • to fit the denture base to the edentulous ridge
  • to correct the occlusal discrepancies
  • to adjust retentive clasps if necessary
  • ton instruct the patient in home care
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2
Q

the denture base will usually exhibit heavy contact with the:

A

lateral walls, both buccal and lingual or palatal of the ridge

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3
Q

the denture base will exhibit light or no contact with:

A

the ridge crest

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4
Q

what are the most frequently observed undercutareas

A
  • undercuts buccal to the edentulous ridge in the mandibular premolar
  • maxillary tuberosity area
  • mylohyoid ridge
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5
Q

denture base flange length contributes to:

A
  • resistance to horizontal or lateral displacement of the denture
  • a major share of vertical support for the partial denture
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6
Q

where are tooth-borne RPD evaluated and adjusted for occlusion

A

intra orally

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7
Q

how do you correct occlusal discrepancies in tooth tissue borne RPD

A

clinical remount

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8
Q

how should natural teeth contact

A

teeth which contact without the prosthesis in place continue to do so with the prosthesis in place

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9
Q

what are the steps in the clinical remounting procedure

A
  • facebow
    -pick- up impression
    -block out undercuts
    -remount cast and intra occlusal record
  • articulation
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10
Q

what does selective grinding do

A
  • by altering the incline of a cusp, intereferences can be eliminate without changing cusp height
  • the cusp tips should not be relieved arbitrarily
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11
Q

how should you adjust the retentive clasp

A
  • at time of insertion use slightly less than maximum retention
  • clasps should be adjusted in small increments
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12
Q

what tool should be used to adjust the half round, cast circumferential retentive clasp

A
  • No. 139 plier
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13
Q

what is the home care instructions

A
  • brush the RPD using soap and a denture brush
  • prosthesis should be removed for 8 hours each day and soaked upon removal
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14
Q

what does soaking denture do

A

prevents distortion of the acrylic resin

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15
Q

why should the patient not soak in RPD in bleach

A

it will cause the metal to corrode and make the framework more brittle

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16
Q

how should the patient remove the RPD from the mouth

A

grasp acrylic resin denture bases on each side of the arch and carefully withdraw the removable partial denture from the mouth

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17
Q

when are adjustments done

A
  • 24 hours after delivery and 1 week after insertion
  • prosthesis should be inserted 4-5 hours before the appointment so that problem areas can be visualized
  • use PIP to aid in locating overextension or pressure area
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18
Q

what are common complaints

A
  • problems with phonetics
  • cheek or tongue biting
  • difficulty in chewing
  • loose denture
  • gagging
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19
Q

what causes problems with phonetics

A
  • improper placement of the prosthetic anterior teeth or changes in the contour of the anterior palate
20
Q

what happens if there is improper placement of maxillary and mandibular premolars if positioned too far lingually

A

the action of the tongue may be limited and speech may be affected

21
Q

how are phonetics affected if positioned too far buccally

A

whistling or slurring of speech

22
Q

how can you correct an RPD positioned too far buccaly

A

soft utility wax adapted to the lingual surfaces of the premolar teeth to decrease the escape of air and the whistling or slurring effect

23
Q

what is cheek biting caused by

A

insufficient horizontal overlap between maxillary and mandibular teeth

24
Q

how can horizontal overlap be increased to stop cheek biting

A
  • if artificial teeth are correctly positioned- round the buccal cusps of mandibular posterior teeth to move cusps slightly lingual
  • if artifical teeeth are incorrectly positioned reset teeth
25
Q

what is tongue biting caused by

A

the artifical teeth being positioned too far lingually and there is a decrease in the tongue space

26
Q

how do you fix tongue biting

A
  • gentle rounding or rolling the lingual cusps and recontouring of the lingual surfaces of the mandibular teeth
  • if tongue biting continues after the teeth have been reshaped the artificial teeth need to be reset
27
Q

when would the patient have difficulty chewing

A

if the patient has been missing teeth for several years they have lost neuromuscular skills required to incise and grind food
- chewing pattern will be reestablished

28
Q

during early period of adjustment to RPD patient should avoid:

A

extremely tough, stringy, or sticky food

29
Q

how can difficulty chewing be affected by occlusal surfaces of teeth

A
  • if the occlusal anatomy is not adequate the tooth will be inefficient in chewing
30
Q

how can occlusal surfaces be modified to help with chewing difficulties

A
  • additional sluiceways and grooves should be added to the occlusal surface to increase the cutting efficiency
31
Q

what is gagging caused by and how is it fixed

A
  • poor adaptation of a maxillary RPD to the tissues of the hard palate due to faulty impression
  • if maxillary RPD is overextended posteriorly- trim the posterior border of the major connector
  • overextension both in length and bulk of the denture base flanges at the distal extension areas
  • increase/decrease in occlusal vertical dimension
32
Q

what is soft tissue laceration or ulceration of the soft tissues caused by

A

an overextended denture base

33
Q

what should cause suspiscion of over extension

A

increased redness or translucency

34
Q

when does translucent appearance of soft tissue appear

A

just before actual ulceration occurs

35
Q

what is erythema and what is it caused by

A
  • redness of soft tissues
  • roughness of the denture base or a slightly rubbing movement of the denture base against soft tissues
  • occlusal discrepancies or prematurities
36
Q

how can you identify irregularities on the intaglio surface

A

to pass a fingertip or gauze pad over the intaglio surface of the resin

37
Q

how do you confirm the roughness of the RPD causing soft tissue irritation

A

PIP

38
Q

when soft tissue irritation has been eliminated, evaluate:

A

all teeth that are in contact with the prosthesis

39
Q

how should natural teeth be evaluated

A

with prosthesis out of the mouth, mesial, distal, buccal and lingual pressure should be applied

40
Q

what is irritation to teeth caused by

A

pressure from the partial denture such as pressure from the metal or resin of the prosthesis on the abutment teeth upon which the prosthesis is seated

41
Q

how can irritation to teeth be evaluated

A

producing an area of show through in the disclosing wax

42
Q

if there is no show through in disclosing wax and teeth are irritated what should you suspect

A

occlusal trauma caused by interference between a natural tooth in one arch and the metal of the prosthesis in the opposite arch

43
Q

if the RPD exhibits instability what should you do

A

adjust one or more of the retentive clasps and if this does not work remake the RPD

44
Q

what do you need to be careful of when adjusting posterior extension of RPD major connector in maxillary

A

dont remove the beads
- if you do food will trap there

45
Q
A

Removable Partial Dentures (21 decks)

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