interim rpd.ppt - interim removable partial dentures

Download Interim RPD.ppt - Interim Removable Partial Dentures

Post on 15-Jul-2015




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  • Interim Removable Partial Dentures

  • Interim Removable Partial DenturesShort period of timePrior to a definitive dentureAcrylic major connector, wrought wire clasps

  • IndicationsLarge pulps (cant fabricate bridge)Clinical crowns too shortNo usable undercuts

  • IndicationsChildren - permanent prosthesis would be quickly outgrownTemporary space maintenance (caries, trauma, congenitally missing teeth)

  • IndicationsTemporary time or financial constraintsSudden loss of teeth, before sufficient healing has occurred (accidents, after extractions)

  • IndicationsTransitional DentureTransition to a complete dentureTeeth need to be extracted but not immediately (medically compromised)Patient is not psychologically prepared

  • IndicationsTreatment DentureImprove a condition before a definitive denture

  • IndicationsTreatment DentureTissue conditioning

  • IndicationsTreatment DentureImplant healing

  • IndicationsTreatment DentureAlteration of vertical dimension / occlusionDetermine how patient will respond to changes (TMD)Surgical Splint Removal of palatal tori

  • Interim Prosthesis FabricationPreliminary impressionsDesign the definitive partial denture (interim denture will use similar design)

  • Interim Prosthesis FabricationOptional Step (preferred) Tooth preparations for a definitive RPD New alginate impression

  • Interim Prosthesis FabricationMaxillo-mandibular relationsArticulate casts

  • DesignClasps (Wrought wire 0.02)Circumferential

  • DesignClasps (Wrought wire 0.02)Ball claspsRest and retentive elements

  • DesignClasps (Wrought wire 0.02)Adams claspsRest and retentive elements

  • DesignBracingLingual/palatal major connector provides bracingContacts teeth at the heights of contour

  • DesignRestsUsually wrought wire Acrylic may be used over cingulum rest seatsLonger term use - cast retainers

  • DesignMajor ConnectorsFull palatal coverage increases strength & stabilityExtend denture to first molarRetentive clasps embedded into major connector

  • 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

  • Prescription WritingSurvey the cast & mark height of contour & retention areas (0.02)Indicate type of retentive clasp, rest & bracing

  • 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

  • AdjustmentCommonly adjust:

    interproximal extensions (A)where clasp exits from resin (B)tissue undercuts (C)

    (McCracken's Removable Partial Prosthodontics, 11th Ediion. Elsevier, 2005)


  • FlipperSlang - No Clasps