An interim removable partial denture is a short-term denture used prior to a definitive denture. It is made of acrylic with a major connector and wrought wire clasps. It can be used when teeth have large pulps preventing bridges, when clinical crowns are too short or there are no undercuts. It provides temporary space maintenance for issues like caries, trauma, or missing teeth. It can also be used as a transitional or treatment denture before a final denture. The fabrication involves impressions, design of clasps and rests, and articulation of casts. Adjustments may be needed to proximal extensions, where the clasp exits the resin, or tissue undercuts.

1. Interim Removable PartialInterim Removable Partial
DenturesDentures
By : Ahmed Ali AbbasBy : Ahmed Ali Abbas
theoptimalsmile.wix.comtheoptimalsmile.wix.com

2. Interim Removable PartialInterim Removable Partial
DenturesDentures
• Short period of timeShort period of time
• Prior to a definitive denturePrior to a definitive denture
• Acrylic major connector, wrought wireAcrylic major connector, wrought wire
claspsclasps

3. 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

4. IndicationsIndications
• Children - permanent prosthesis wouldChildren - permanent prosthesis would
be quickly outgrownbe quickly outgrown
• Temporary space maintenance (caries,Temporary space maintenance (caries,
trauma, congenitally missing teeth)trauma, congenitally missing teeth)

7. IndicationsIndications
• Temporary time or financial constraintsTemporary time or financial constraints
• Sudden loss of teeth, before sufficientSudden loss of teeth, before sufficient
healing has occurred (accidents, afterhealing has occurred (accidents, after
extractions)extractions)

11. IndicationsIndications
• Transitional DentureTransitional Denture
− Transition to a complete dentureTransition to a complete denture
•Teeth need to be extracted but notTeeth need to be extracted but not
immediately (medicallyimmediately (medically
compromised)compromised)
•Patient is not psychologicallyPatient is not psychologically
preparedprepared

15. IndicationsIndications
• Treatment DentureTreatment Denture
− Improve a condition before a definitiveImprove a condition before a definitive
denturedenture

16. IndicationsIndications
• Treatment DentureTreatment Denture
− Tissue conditioningTissue conditioning

17. IndicationsIndications
• Treatment DentureTreatment Denture
− Implant healingImplant healing

18. IndicationsIndications
• Treatment DentureTreatment Denture
− Alteration of vertical dimension /Alteration of vertical dimension /
occlusionocclusion
•Determine how patient will respondDetermine how patient will respond
to changes (TMD)to changes (TMD)
− Surgical SplintSurgical Splint
• Removal of palatal toriRemoval of palatal tori

21. Interim Prosthesis FabricationInterim Prosthesis Fabrication
• Preliminary impressionsPreliminary impressions
• Design the definitive partial dentureDesign the definitive partial denture
(interim denture will use similar design)(interim denture will use similar design)

22. Interim Prosthesis FabricationInterim Prosthesis Fabrication
• Optional Step (preferred)Optional Step (preferred)
− Tooth preparations for a definitiveTooth preparations for a definitive
RPDRPD
− New alginate impressionNew alginate impression

23. Interim Prosthesis FabricationInterim Prosthesis Fabrication
• Maxillo-mandibular relationsMaxillo-mandibular relations
• Articulate castsArticulate casts

24. DesignDesign
• Clasps (Wrought wire 0.02”)Clasps (Wrought wire 0.02”)
− CircumferentialCircumferential

25. DesignDesign
• Clasps (Wrought wire 0.02”)Clasps (Wrought wire 0.02”)
− Ball claspsBall clasps
•Rest and retentive elementsRest and retentive elements

26. DesignDesign
• Clasps (Wrought wire 0.02”)Clasps (Wrought wire 0.02”)
− Adams claspsAdams clasps
•Rest and retentive elementsRest and retentive elements

27. DesignDesign
• BracingBracing
− Lingual/palatal major connectorLingual/palatal major connector
provides bracingprovides bracing
− Contacts teeth at the heights ofContacts teeth at the heights of
contourcontour

28. DesignDesign
• RestsRests
− Usually wrought wireUsually wrought wire
− Acrylic may be used over cingulumAcrylic may be used over cingulum
rest seatsrest seats
− Longer term use - cast retainersLonger term use - cast retainers

29. DesignDesign
• Major ConnectorsMajor Connectors
− Full palatal coverage increasesFull palatal coverage increases
strength & stabilitystrength & stability
− Extend denture to first molarExtend denture to first molar
− Retentive clasps embedded into majorRetentive clasps embedded into major
connectorconnector

30. Prescription WritingPrescription Writing
• Mark teeth to be extracted on the cast &Mark teeth to be extracted on the cast &
write the teeth number on thewrite the teeth number on the
prescriptionprescription
• Draw a line around the teeth where theDraw a line around the teeth where the
cast should be surgerizedcast should be surgerized

31. Prescription WritingPrescription Writing
• Survey the cast & mark height of contourSurvey 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

32. 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 theDraw 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

33. AdjustmentAdjustment
Commonly adjust:
• interproximal extensions (A)
• where clasp exits from resin (B)
• tissue undercuts (C)
(McCracken's Removable Partial Prosthodontics, 11th
Ediion. Elsevier, 2005)

34. ‘‘Flipper’Flipper’
• Slang - No ClaspsSlang - No Clasps