最新PREVENTIVE DENTAL MATERIALS Columbia University哥伦比亚大学预防口腔材料教学讲义ppt.ppt

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1、PREVENTIVEDENTALMATERIALSColumbiaUniversity哥伦比亚大学预防口腔材料PreventiveDentalMaterialsToothPasteMouthWashesFluoridesSealantsMouthguardsToothPasteComponents/compositionColloidalbindingagents-NaAlginate,methycelluloseFunction:preventseparationofthecomponentsinthetubeduringstorage.Humectants(moiste

2、nsordilutes)-glycerinFunction:reduceswaterlossbyevaporation.Preservatives-usedtoinhibitbacterialgrowth.FlavoringagentsFluoridesGels,Foams,Rinses,VarnishesAPFgel-2%NaF,0.34%HF,0.98%Phosacid4minapplicationisoptimalNoeatingordrinkingfor1hrpostapplicationAppliedtwiceayearQuestionA5yroldptlives

3、inanareawith.75ppmflouride.WhatistherecommendedFlsupplementinthiscase?NDB-87FluorideVarnishes5%NaFLongHistoryinEuropeExcellentClinicalEffectiveness0.1%DifluorosilaneDurafluor,Omnifluor,etc.EasytoUse:PaintTHINLayeronDryTeeth24HourSlightYellowingQuestion-Achildspendshisfirstsevenyearsinacomm

4、unityinatemperatezone,watersupplycontains3ppmflouride,mottlingwilldevelopinwhichteeth?NDB’87NDBExcerptsFinhibitsglucosyltransferase.Strepmutansusesthistoproducedextranstoattachtoteeth.FlpreventssmoothsurfacecariesNOTpitandfissurecaries….SealantspreventpitandfissureC.Toxicflouridedose=5mg/k

5、g.Lethaldose=20mg/kg.Antidote-milkandantacidscontainingcalcium.NDBExcerptsFlouridesaffectthetoothinthefollowingmanner-Chemicallyreactswithhydroxyapatitecrystalstoreplacethehydroxylions,Onlyeffectstheouterlayersofenamel…makestheapatitecrystalsmoreresistanttoacid,…Increasesremineralization.T

6、otalreductionofsmoothsurfacecariesbyflouride–75-90%,(systemic30%,topical30%,occlusalsealants-30%).GlassIonomercementsFluorosilicateglasspowder(base)combinedwithawatersolublepolymer(acid)e.g.-KetaccementResin-modifiedglassionomercements:areglassionomerswithalightpolymerisedresincomponent.e.

7、g.-VitrebondandVitremerResin-modifiedglassionomersAdvantages:IncreasedmechanicalpropertiesPhysiochemicallybondstotoothstructureBiocompatible,moistureforgivingSimilarcoefficientofthermalexpansionasdentinthereforeagooddentinreplacementmaterial.(sandwichtechnique