《龋临床特征和诊断》PPT课件

Chapter3ClinicalManifestationsandDiagnosisofDentalCaries,HistophathologyofCaries,EnamelCaries,Theearlyenamellesionconsistsoffourzonesofalternatinglevelsofmineralisation.,Itillustratesthedynamicnatureofthecariesprocess.Thesurfacezoneblocksthepassageofcalciumionsintothebodyofthelesionandmayhavetoberemovedtoallowthelesiontobecomearrested(AfterKiddallofwhichenhancethegeneralhealthandwelfareofthepatient.,IndicationofOperativeDentistry,CariesMalformed,discolored,orfracturedteethRestorationreplacement,ProgramofOperativeTreatment,PatientassessmentExaminationanddiagnosisTreatmentplanning,CavityPreparation,Themechanicalalterationofadefective,injured,ordiseasedtoothinordertobestreceivearestorativematerialwhichwillre-establishahealthystateforthetoothincludingestheticcorrectionswhereindicated,alongwithnormalformandfunction.,Classificationofcavity,ClassClassClassClassClassClass,G.V.Blackin1908,ClassI,AllpitandfissurecavitiesareClassI.Cavitiesonocclusalsurface;Cavitiesonocclusaltwo-thirdsofthefacialandlingualsurfacesofmolars;Cavitiesonlingualsurfaceofmaxillaryincisor.,ClassII,AcavityoccurringontheproximalsurfaceofposteriorteethareClassII.MOmesialandocclusalDOdistalandocclusalMODmesial,occlusalanddista,ClassIII,CavitiesontheproximalsurfacesofanteriorteeththatdonotinvolvetheincisalanglesareClassIII.,ClassIV,CavitiesontheproximalsurfacesofanteriorteeththatdoinvolvetheincisalanglesareClassIV.,ClassV,Cavitiesonthegingivalthirdofthefacialorlingualsurfacesofallteeth(notpitandfissurecavities)areClassV.,ClassVI,CavitiesontheincisaledgeofanteriorteethortheocclusalcuspheightsofposteriorteethareClassVI.,洞型分类,一类洞：根据发生于所有牙齿的发育窝，沟内的龋损所制备的洞型。二类洞：后牙邻面的龋损所制备的洞型。三类洞：前牙邻面未损及切角的龋损所制备的洞型。四类洞：前牙邻面损及切角的龋损所制备的洞型。五类洞：所有牙齿颊（唇），舌（腭）面龈1/3牙面的龋损制备的洞型。六类洞：所有牙齿牙尖，牙脊或冠轴交界的轴角区的龋损所制备的洞型。,CavityStructure,wallsanglescavity,Walls,Internalwalls:apreparedcavitysurfacethatdoesnotextendtotheexternaltoothsurface.,Axialwalls:aninternalwallparallelwiththelongaxisofthetoothandocclusalofthetooth.,Pulpalwalls:aninternalwallthatisbothperpendiculartothelongaxisofthetoothandocclusalofthepulp.,Walls,Externalwalls:apreparedcavitysurfacethatextendtotheexternaltoothsurface.,.,Theexternalwallstakesthenameofthetoothsurfacethatthewallistoward.,Angles,Lineangle:thejunctionofthetwoplanalsurfacesofdifferentorientationalongaline.,Angles,Pointangle:thejunctionofthreeplanalsurfacesofdifferentorientation.,Angles,Cavosurfaceangle:theangleoftoothstructureformedbythejunctionofapreparedcavitywallandtheexternalsurfaceofthetooth.,Alsoreferredtoasthecavitymarginorcavosurfacemargin.,3洞型结构洞壁：窝洞的壁，分侧壁和髓壁(pulpalwalls)侧壁与牙面垂直的壁(颊壁,龈壁)髓壁与洞侧壁垂直，位于洞底覆盖牙髓的洞壁。轴壁与牙长轴平行的髓壁洞角点角三壁相交构成颊轴龈点角线角两壁相交构成颊髓线角洞缘角洞侧壁与牙面相交形成的线角洞缘窝洞侧壁与牙面相交构成洞