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RemoveablepartialdentureSummary01Removablepartialdentureisadentalprosthesisthatreplacesthelostnaturaldentitionandassociatedstructuresofmaxillaormandible;itcanberemovedconvenientlyfromthemouthbythepatient.Indication02Avarietyofdentitiondefects,especiallythosewithfreeendteeth.01Teethmissingwithalveolarbone,jaworsofttissuedefect.02Theneedfortransitionaldentureintheprocessoftoothextractionhealing.03Periodontaldiseaseneedsactivesplintfixationforlooseningteeth.04Verticalocclusaldistanceistoolowduetoseverewearandtearontheocclusalsurfaceorlossofmanyteeth.05Afterextraction,makeanimmediatedentureorotherspecialneeds06formation03RestAnyunitofapartialdenturethatrestsonatoothsurfacetoprovideverticalsupportiscalledarest.01Maintainsestablishedocclusalrelationshipsbypreventingsettlingofthedenture.02Preventionoffoodimpactionandsometimes,itcanbeusedasrestorationofocclusion03Maintainscomponentsintheirplannedpositions.Itswidthandthicknessshouldmeettherequirementsofmaterials.Thewidthis1/3ofmolars'dentaldiametersor1/2ofpremolars.Thelengthisusually1/4ofthemolar’mesiodistalor1/3ofthepremolar.Thethicknessisabout1~1.5mm.Retaineristhepartofremovablepartialdenturetoresistdislocationandobtainretention,supportandstabilityDirectretainersAuxiliarydirectretainer，mainlyenhancesthestabilityofdentureandpreventsthedenturefromwarping,swinging,rotatingandsinking.IndirectretainersThedirectretainerresiststhedisplacementofthedentureawayfromthebaseandplaysamajorroleinretentioncontinuousclaspringclasphalfandhalfclasplongarmclaspcombindclaspmesio-restbuccalIrodclaspdistalmiddlepanelconnectorMajorconnectorsconnectsthecomponentsonthedenture,suchasclaspsandbrackets,withthemajorconnectorsandbase.MinorconnectorsAmajorconnectoristheunitofpartialdenturethatconnectthepartsoftheprosthesislocatedononesideofthearchwiththoseontheoppositeside.PalatalplatelingualplateMajorconnectorsbaseplateThedenturebasesupportsartificialteethandeffectsthetransferofocclusalforcestosupportingoralstructures.Connection：Arrangeartificialteeth,connectdenturepartsintoawhole.Repairdeficiency：Repairofalveolarbone,jawandsofttissuedefectsTransferocclusalforce：Bear,transferanddispersionofartificialteethocclusalforceRetentionandstabilization：PreventrotationandwarpingofdentureRepairofmaxillarysinusfistulawithdenturebaseArtificaltoothReplacemissingnaturalteethwithartificialteethtorestorecrownshapeandmasticatoryfunctionReplacementofmissingnaturalteethtorestorearchintegrityEstablishnormalocclusion,alignmentandadjacencytorestoremasticatoryfunction.AuxiliarypronunciationRestorationofdentitionshapeandfacialshapeTopreventtheremainingteethelongation,tilt,shiftandrelationshipdisorderconclusion04KennedyⅡrestclaspconnctorartificaltoothcaseRPDUsenaturalteeth,basemucosaandbonetissueassupport；Reliedonretainerandbasetoreposition；Restorationoftheshapeandfunctionofmissingteethwithartificialteeth；Restorationofalveolarridge,jawandsurroundingsofttissuewithdenturebasematerial.Thankyou!