13. Interim RPD.ppt
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Transcript of 13. Interim RPD.ppt
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Interim Removable Interim Removable Partial DenturesPartial Dentures
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Interim Removable Interim Removable Partial DenturesPartial Dentures Short period of timeShort period of time Prior to a definitive denturePrior to a definitive denture Acrylic major connector, Acrylic major connector, wrought wire claspswrought wire clasps
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IndicationsIndications
Large pulps (can’t fabricate Large pulps (can’t fabricate bridge)bridge)
Clinical crowns too shortClinical crowns too short No usable undercutsNo usable undercuts
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IndicationsIndications
Children - permanent Children - permanent prosthesis would be quickly prosthesis would be quickly outgrownoutgrown
Temporary space maintenance Temporary space maintenance (caries, trauma, congenitally (caries, trauma, congenitally missing teeth)missing teeth)
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IndicationsIndications
Temporary time or financial Temporary time or financial constraintsconstraints
Sudden loss of teeth, before Sudden loss of teeth, before sufficient healing has sufficient healing has occurred (accidents, after occurred (accidents, after extractions)extractions)
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IndicationsIndications
Transitional DentureTransitional Denture Transition to a complete Transition to a complete denturedenture Teeth need to be extracted Teeth need to be extracted but not immediately but not immediately (medically compromised)(medically compromised)
Patient is not Patient is not psychologically preparedpsychologically prepared
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IndicationsIndications
Treatment DentureTreatment Denture Improve a condition before Improve a condition before a definitive denturea definitive denture
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IndicationsIndications
Treatment DentureTreatment Denture Tissue conditioningTissue conditioning
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IndicationsIndications
Treatment DentureTreatment Denture Implant healingImplant healing
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IndicationsIndications
Treatment DentureTreatment Denture Alteration of vertical Alteration of vertical dimension / occlusiondimension / occlusion Determine how patient will Determine how patient will respond to changes (TMD)respond to changes (TMD)
Surgical SplintSurgical Splint Removal of palatal toriRemoval of palatal tori
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Interim Prosthesis Interim Prosthesis FabricationFabrication
Preliminary impressionsPreliminary impressions Design the definitive partial Design the definitive partial denture denture (interim denture will (interim denture will use similar design)use similar design)
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Interim Prosthesis Interim Prosthesis FabricationFabrication
Optional Step (preferred) Optional Step (preferred) Tooth preparations for a Tooth preparations for a definitive RPD definitive RPD
New alginate impressionNew alginate impression
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Interim Prosthesis Interim Prosthesis FabricationFabrication
Maxillo-mandibular relationsMaxillo-mandibular relations Articulate castsArticulate casts
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DesignDesign
Clasps (Wrought wire 0.02”)Clasps (Wrought wire 0.02”) CircumferentialCircumferential
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DesignDesign
Clasps (Wrought wire 0.02”)Clasps (Wrought wire 0.02”) Ball claspsBall clasps
Rest and retentive Rest and retentive elementselements
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DesignDesign
Clasps (Wrought wire 0.02”)Clasps (Wrought wire 0.02”) Adams claspsAdams clasps
Rest and retentive Rest and retentive elementselements
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DesignDesign
BracingBracing Lingual/palatal major Lingual/palatal major connector provides bracingconnector provides bracing
Contacts teeth at the Contacts teeth at the heights of contourheights of contour
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DesignDesign RestsRests
Usually wrought wire Usually wrought wire Acrylic may be used over Acrylic may be used over cingulum rest seatscingulum rest seats
Longer term use - cast Longer term use - cast retainersretainers
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DesignDesign Major ConnectorsMajor Connectors
Full palatal coverage Full palatal coverage increases strength & increases strength & stabilitystability
Extend denture to first Extend denture to first molarmolar
Retentive clasps embedded Retentive clasps embedded into major connectorinto major connector
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Prescription WritingPrescription Writing
Mark teeth to be extracted on Mark teeth to be extracted on the cast & write the teeth the cast & write the teeth number on the prescriptionnumber on the prescription
Draw a line around the teeth Draw a line around the teeth where the cast should be where the cast should be surgerizedsurgerized
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Prescription WritingPrescription Writing
Survey the cast & mark height Survey the cast & mark height of contour & retention areas of contour & retention areas (0.02”)(0.02”)
Indicate type of retentive Indicate type of retentive clasp, rest & bracingclasp, rest & bracing
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Prescription WritingPrescription Writing
Indicate where rests, retention Indicate where rests, retention arms & bracing are to be placed, arms & bracing are to be placed, state tooth # & surfacestate tooth # & surface
Draw the outline of the denture Draw the outline of the denture on the caston the cast
Identify shade & mould of teeth Identify shade & mould of teeth selectedselected
State the type of occlusion State the type of occlusion requiredrequired
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AdjustmentAdjustment
Commonly 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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‘‘Flipper’Flipper’
Slang - No ClaspsSlang - No Clasps