不同黏结材料与金属全冠黏结界面的实验分析

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1、TheExperimentevaluationofinterfacebetweendifferentlutingcementsandcastingmetalfullcrownMasterdegreecandidate：LiuXUSupervisor：ProfessorLiZhenchunMajor：prostheticdentistryAbstraetobjiective：Usedscanningelectronmicroscope(SEM)toobservedinterf．acebetweenlutingcements

2、andconformationofthedentinlayerelements，analysisandcomparisonofallkindsofthelutingandthecombiningmodeofdentinlayer，whichprovidethetheorybasistochoosethedifferentlmingcementsintheclinical．Materialandmethods：Thisexperimentchose8molarteethwhichwererecentpulledoutof,

3、crownmorphologycompletefromthebody．Thesemolarteethwouldbeembeddedfromenamelo—cementaljunctioninplastermould，andthentoregulartoothpreparation，andmadetheseexperimenttoothkeepcontoursandheightrelativelyconsistent．Aftertakingimpressionmold，perfusiongypsummodel，thecas

4、tingmetalfullcrownwasmadebylosingwax．Use8kindsoflutingcementsforcementedandaccordingtotheordernumbersbehindt11e如Ucrownsweretry．MadetheExperimentspecimenin23+I。C，andthenstoredintheenvironmentwhichmajntained100％relativehumidity，and30dayslaterwewouldseparatededperim

5、entspecimenwiththeplastermould，embeddedinepoxyresins．Cuttingspecimenwithslowsawteethalongthedirectionofperpendiculartotheteethlongaxis，thegrindingandpolishing，ultrasoniccleaning，thespecimenexaminedunderscanmngelectronmicroscope(SEM)andelectronmicroprobeanalyzer(E

6、PMA)withelectronbeamoflgmindiameter，observedbondandlinearanalysisandelementalanalysisbyelectronmicroscopyin500，2000times．Metalfullcrown，thedentin，lutingcementsandlutinginterfacepointscanning，linescanningofthespecimenunder100timesmagnification．Themainelementsofthe

7、selectedadhesivematerialbyobservingthedataanalysisofthelutinginterfaceelementswithin50pmexchangetransfer．Results：1Al、Si、P、F、K、FaredetectedintheGCFujiPlus；A1、Si、C、0、Caaredetectedinthelutinginterfaceintherangeof509rn．2Al、Si、P、S、KaredetectedintheGCFujiI：A1、P、C、Caare

8、detectedinthelutinginterfaceintherangeof50IJxn．3A1、Si、P、K、CaaredetectedintheShofuGlasionomer；Mg、Si、C、O、Caaredetectedinthelutinginterfaceintherangeof509m．4A1、Si