Interim Removable Partial Interim Removable Partial DenturesDentures

Interim Removable Partial Interim Removable Partial DenturesDentures

• Short period of timeShort period of time• Prior to a definitive denturePrior to a definitive denture• Acrylic major connector, wrought wire Acrylic major connector, wrought wire

claspsclasps

IndicationsIndications

• Large pulps (can’t fabricate bridge)Large pulps (can’t fabricate bridge)• Clinical crowns too shortClinical crowns too short

− No usable undercutsNo usable undercuts

IndicationsIndications

• Children - permanent prosthesis would Children - permanent prosthesis would be quickly outgrownbe quickly outgrown

• Temporary space maintenance (caries, Temporary space maintenance (caries, trauma, congenitally missing teeth)trauma, congenitally missing teeth)

IndicationsIndications

• Temporary time or financial constraintsTemporary time or financial constraints• Sudden loss of teeth, before sufficient Sudden loss of teeth, before sufficient

healing has occurred (accidents, after healing has occurred (accidents, after extractions)extractions)

IndicationsIndications

• Transitional DentureTransitional Denture− Transition to a complete dentureTransition to a complete denture

• Teeth need to be extracted but not Teeth need to be extracted but not immediately (medically immediately (medically compromised)compromised)

• Patient is not psychologically Patient is not psychologically preparedprepared

IndicationsIndications

• Treatment DentureTreatment Denture− Improve a condition before a definitive Improve a condition before a definitive

denturedenture

IndicationsIndications

• Treatment DentureTreatment Denture− Tissue conditioningTissue conditioning

IndicationsIndications

• Treatment DentureTreatment Denture− Implant healingImplant healing

IndicationsIndications

• Treatment DentureTreatment Denture− Alteration of vertical dimension / Alteration of vertical dimension /

occlusionocclusion• Determine how patient will respond Determine how patient will respond

to changes (TMD)to changes (TMD)− Surgical SplintSurgical Splint

• Removal of palatal toriRemoval of palatal tori

Interim Prosthesis FabricationInterim Prosthesis Fabrication

• Preliminary impressionsPreliminary impressions• Design the definitive partial denture Design the definitive partial denture

(interim denture will use similar design)(interim denture will use similar design)

Interim Prosthesis FabricationInterim Prosthesis Fabrication

• Optional Step (preferred) Optional Step (preferred) − Tooth preparations for a definitive Tooth preparations for a definitive

RPD RPD − New alginate impressionNew alginate impression

Interim Prosthesis FabricationInterim Prosthesis Fabrication

• Maxillo-mandibular relationsMaxillo-mandibular relations• Articulate castsArticulate casts

DesignDesign

• Clasps (Wrought wire 0.02”)Clasps (Wrought wire 0.02”)− CircumferentialCircumferential

DesignDesign

• Clasps (Wrought wire 0.02”)Clasps (Wrought wire 0.02”)− Ball claspsBall clasps

• Rest and retentive elementsRest and retentive elements

DesignDesign

• Clasps (Wrought wire 0.02”)Clasps (Wrought wire 0.02”)− Adams claspsAdams clasps

• Rest and retentive elementsRest and retentive elements

DesignDesign

• BracingBracing− Lingual/palatal major connector Lingual/palatal major connector

provides bracingprovides bracing− Contacts teeth at the heights of Contacts teeth at the heights of

contourcontour

DesignDesign• RestsRests

− Usually wrought wire Usually wrought wire − Acrylic may be used over cingulum Acrylic may be used over cingulum

rest seatsrest seats− Longer term use - cast retainersLonger term use - cast retainers

DesignDesign• Major ConnectorsMajor Connectors

− Full palatal coverage increases Full palatal coverage increases strength & stabilitystrength & stability

− Extend denture to first molarExtend denture to first molar− Retentive clasps embedded into major Retentive clasps embedded into major

connectorconnector

Prescription WritingPrescription Writing

• Mark teeth to be extracted on the cast & Mark teeth to be extracted on the cast & write the teeth number on the write the teeth number on the prescriptionprescription

• Draw a line around the teeth where the Draw a line around the teeth where the cast should be surgerizedcast should be surgerized

Prescription WritingPrescription Writing

• Survey the cast & mark height of contour Survey the cast & mark height of contour & retention areas (0.02”)& retention areas (0.02”)

• Indicate type of retentive clasp, rest & Indicate type of retentive clasp, rest & bracingbracing

Prescription WritingPrescription Writing

• Indicate where rests, retention arms & Indicate where rests, retention arms & bracing are to be placed, state tooth # & bracing are to be placed, state tooth # & surfacesurface

• Draw the outline of the denture on the Draw the outline of the denture on the castcast

• Identify shade & mould of teeth selectedIdentify shade & mould of teeth selected• State the type of occlusion requiredState the type of occlusion required

AdjustmentAdjustment

Commonly adjust:

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

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

‘‘Flipper’Flipper’

• Slang - No ClaspsSlang - No Clasps