最新Restorative Materials in Pediatric Dentistry牙科修复材料课件ppt.ppt

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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