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时间:2021-04-14
《最新Restorative Materials in Pediatric Dentistry牙科修复材料课件ppt.ppt》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、RestorativeMaterialsinPediatricDentistry牙科修复材料PreventiveMaterialsFluoridegels,foamandvarnish:Usedforremineralisationofdecalcifiedenamelandincipientcaries.Sealants:Indicatedforpreventingandarrestingincipientlesions.Availableasclearorwhite,filledorunfilled,containingFluorid
2、eornot.Resinbasedcomposites(RBC)Resinmatrix(Bis-GMA)withinorganicfillerparticles.1.Fillercontent-FilledvsUnfilledFlowablevspackableAnteriorvsposteriorcompositeParticlesize-macro,microfilledandhybridsDentin/EnameladhesivesinPediatricDentistry3-steptotaletchTotaletchusingpr
3、imeandbondSelfetchprimerswithbondingagentAll-in-oneadhesivese.g.-promptL-popsGlassIonomercementsFluorosilicateglasspowder(base)combinedwithawatersolublepolymer(acid)e.g.-KetaccementResin-modifiedglassionomercements:areglassionomerswithalightpolymerisedresincomponent.e.g.-
4、VitrebondandVitremerResin-modifiedglassionomersAdvantages:IncreasedmechanicalpropertiesPhysiochemicallybondstotoothstructureBiocompatible,moistureforgivingSimilarcoefficientofthermalexpansionasdentinthereforeagooddentinreplacementmaterial.(sandwichtechnique)Ionlechability
5、-Fluoriderelease(anticariogenicaction)MinimalpolymerizationshrinkageCompomersPolyacid-modified,resinbasedcompositewithfluoridereleasingglassfillers.e.g.-compoglass,dyractBetterresultsafteretchandbondGoodmechanicalpropertiesandpolishabilityAmalgamNopolymerizationshrinkageM
6、oistureforgivingExcellentmechanicalpropertiesMercurytoxicityEstheticsResearchtrendsPolymerizationshrinkageMechanicalpropertiesMore‘forgiving’materialsInsummary….“Primaryteethareatemporarydentitionwithknownlifeexpectanciesofeachtooth.Bymatchingthe‘right’restorationwiththee
7、xpectedlifespanofthetooth,wecansucceedinprovidinga‘permanent’restorationthatwillneverhavetobereplaced.”语法互动(一) 名词语法互动(一)┃名词中考要求1.理解并能区别所学的可数名词和不可数名词。2.熟练掌握所学的可数名词复数形式的构成及用法。3.掌握物质名词及其量的表达方式。如:acupoftea,twobottlesofmilk等。4.掌握常用专有名词的一般用法。如:China,Jim,theGreatWall等。5.熟练掌握名词所有
8、格的用法。如:Lucy'scoat,Teachers'Day等。6.了解集合名词(如:people,class)和抽象名词(如:homework)的概念及一般用法。1.概述不可数名词:不能直接
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