13. interim rpd
DESCRIPTION
interim removable partial dentureTRANSCRIPT
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Interim Removable Partial Dentures
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Interim Removable Partial DenturesShort period of timePrior to a definitive dentureAcrylic major connector, wrought wire clasps
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IndicationsLarge pulps (cant fabricate bridge)Clinical crowns too shortNo usable undercuts
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IndicationsChildren - permanent prosthesis would be quickly outgrownTemporary space maintenance (caries, trauma, congenitally missing teeth)
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IndicationsTemporary time or financial constraintsSudden loss of teeth, before sufficient healing has occurred (accidents, after extractions)
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IndicationsTransitional DentureTransition to a complete dentureTeeth need to be extracted but not immediately (medically compromised)Patient is not psychologically prepared
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IndicationsTreatment DentureImprove a condition before a definitive denture
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IndicationsTreatment DentureTissue conditioning
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IndicationsTreatment DentureImplant healing
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IndicationsTreatment DentureAlteration of vertical dimension / occlusionDetermine how patient will respond to changes (TMD)Surgical Splint Removal of palatal tori
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Interim Prosthesis FabricationPreliminary impressionsDesign the definitive partial denture (interim denture will use similar design)
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Interim Prosthesis FabricationOptional Step (preferred) Tooth preparations for a definitive RPD New alginate impression
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Interim Prosthesis FabricationMaxillo-mandibular relationsArticulate casts
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DesignClasps (Wrought wire 0.02)Circumferential
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DesignClasps (Wrought wire 0.02)Ball claspsRest and retentive elements
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DesignClasps (Wrought wire 0.02)Adams claspsRest and retentive elements
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DesignBracingLingual/palatal major connector provides bracingContacts teeth at the heights of contour
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DesignRestsUsually wrought wire Acrylic may be used over cingulum rest seatsLonger term use - cast retainers
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DesignMajor ConnectorsFull palatal coverage increases strength & stabilityExtend denture to first molarRetentive clasps embedded into major connector
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Prescription WritingMark teeth to be extracted on the cast & write the teeth number on the prescriptionDraw a line around the teeth where the cast should be surgerized
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Prescription WritingSurvey the cast & mark height of contour & retention areas (0.02)Indicate type of retentive clasp, rest & bracing
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Prescription WritingIndicate where rests, retention arms & bracing are to be placed, state tooth # & surfaceDraw the outline of the denture on the castIdentify shade & mould of teeth selectedState the type of occlusion required
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AdjustmentCommonly adjust:
interproximal extensions (A)where clasp exits from resin (B)tissue undercuts (C)
(McCracken's Removable Partial Prosthodontics, 11th Ediion. Elsevier, 2005)
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FlipperSlang - No Clasps