nature and usage of Interim Removable Partial Dentures

about nature and usage of interim RPD

1. Interim Removable Partial Interim Removable Partial
DenturesDentures

2. 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

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 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)

7. 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)

11. 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

15. IndicationsIndications
Treatment DentureTreatment Denture
Improve a condition before a definitive Improve 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 respond Determine 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 denture Design 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 definitive Tooth preparations for a definitive
RPD RPD
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 connector Lingual/palatal major connector
provides bracingprovides bracing
Contacts teeth at the heights of contourContacts teeth at the heights of contour

28. 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

29. 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

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 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

31. 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

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 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

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