Interim Removable Interim Removable Partial DenturesPartial Dentures

By : Ahmed Ali AbbasBy : Ahmed Ali Abbastheoptimalsmile.wix.comtheoptimalsmile.wix.com

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

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

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)

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)

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

IndicationsIndications

Treatment DentureTreatment Denture Improve a condition before Improve a condition before a definitive denturea definitive denture

IndicationsIndications

Treatment DentureTreatment Denture Tissue conditioningTissue conditioning

IndicationsIndications

Treatment DentureTreatment Denture Implant healingImplant healing

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

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)

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

Interim Prosthesis Interim Prosthesis FabricationFabrication

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 Rest and retentive elementselements

DesignDesign

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

Rest and retentive Rest and retentive elementselements

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

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

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

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

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

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

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