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1、大連醫(yī)科大學碩士學位論文Theapplicationofdifferentgingivalretractionmethodsforporcelain·fixedprosthodonticsMasterdegreecandidate：YangYangSupervisor：AssociateProfessorLiuYangVice·supervisor：AssociateProfessorLiuYangMajor：MasterofStomatologyAbstractObjective：Thisresearcha
2、imstocompareclinicaleffectsregardingseveralgingivalretractionmethodsinporcelain—fixedprosthodontics．MaterialandMethods：37patientsrequiringporcelain—fixedprosthesiswereincludedinthestudyfromMar．2012toMar．2013，Totally60teeth(anteriorteeth：38posteriorteeth：22)
3、withhealthyperiodontalconditionwereevaluated，amongwhich36teethwithnormalclinicalcrownheightaswellaswithoutgingivaldefect；14residualroots；10teethwithshortclinicalcrownheight．Afterpreparation，werandomlydividedallofteethpreparedintofourgroupswithfourgingivalre
4、tractionmethods(thesinglecordtechnique；thedoublecordtechnique；retractionassistedbytemporarycrown；gingivalretractionpaste)andeachgroupcontained15teeth．Afterthegingivalcontraction，makingimpressionwithsiliconrubberoragarandalginatecombinationimpressionmaterial
5、immediately，thenwemadeplatercast．Finallyalltheteeth、gums、impressionsandcastswerevisuallyinspectedandevaluatedbyonedentist．Results：Inthesampleofteethwithnormalclinicalcrownheightaswellaswithoutgingivaldefect，therateuptostandardofthedoublecordtechnique，retrac
6、tionassistedbytemporarycrown，gingivalretractionpastewashigherthanthesinglecordtechniquerespectively．Whileretractionassistedbytemporarycrown，gingivalretractionpastereachedhigherrateinthesampleofresidualrootsandteethwithshort’clinicalcrownheight．大連醫(yī)科大學碩士學位論文C
7、onclusion：thedoublecordtechnique，retractionassistedbytemporarycrown，gingivalretractionpastecouldachievedesiredeffectofgingivalretraction；Eitherthemethodofretractionassistedbytemporarycrownorgingivalretractionpastereachesbettereffectinthecaseofresidualrootan
8、dtoothwithshortcrownheight．Keywords：TemporarycrownGingivalretractioncordGingivalretraction大連醫(yī)科大學碩士學位論文不同排齦方法在口腔瓷固定修復中的應用碩士生姓名：楊揚指導教師：劉洋副教授指導小組：劉洋副教授專業(yè)名稱：口腔醫(yī)學碩士刖舌修復體邊緣適合性很大程度上決定著修復的成敗，而合理的排齦會極大程度的減少牙齦出血
