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)

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FlipperSlang - No Clasps