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1、Orthodonticdiagnosis ThedevelopmentofaProblemList Operator ZhouLingSupervisor Prof LiDate 2013 6 6 1 5 3 4 DevelopmentofaProblemList TheProblem Orientedapproach ClinicalEvaluation AnalysisofDiagnosticRecords OrthodonticClassification Chapteroutline 2 SymmetrySpaceanalysisEstimatingofuneruptedpermane
2、ntteethToothsizeanalysis Dentalcastanalysis Symmetry TransparentruledgridplacedoverdentalcastOrientedtothemidpalatalrapheSpotasymmetriesinarchform andtoothposition Lateraldriftofincisors Crowding Clost3blockedout Symmetry Driftofposteriorteeth EarlylossofE Pendulum SymmetrySpaceanalysisEstimatingofu
3、neruptedpermanentteethToothsizeanalysis Dentalcastanalysis Alignment Crowding SpaceAnalysis Dentalcast Computeralgorithm SpaceAnalysis Measuringarchperimeterfromthemesialofonefirstmolartotheother overthecontactpointsofposteriorteethandincisaledgeofanteriors Stepone Calculationofavailablespace 片段法 铜丝
4、法 Steptwo Calculationofrequiredspace Measurethemesiodistalwidthofeacheruptedtoothfromcontactpointtocontactpoint SpaceAnalysis 01 Thespaceavailablewillnotchangebecauseofgrowth 02 Alltheteetharenormalinsize 03 Correctanteroposteriorpositionofincisors Threeassumptions Interaction Protrusion Retrusion C
5、rowding Crowdingandprotrusionaredifferentaspectsofthesamephenomenon Ifthereisnotenoughroomtoproperlyaligntheteeth theresultcanbecrowding protrusion or mostlikely somecombinationofthetwo 01 Thespaceavailablewillnotchangebecauseofgrowth 02 Alltheteetharenormalinsize 03 Correctanteroposteriorpositionof
6、incisors Threeassumptions Inachildwithawell proportionedface thereislittleornotendencyforthedentitiontobedisplacedrelativetothejawduringgrowth Buttheteethoftenshiftanteriorlyorposteriorlyinachildwithajawdiscrepancy 01 Thespaceavailablewillnotchangebecauseofgrowth 02 Alltheteetharenormalinsize 03 Cor
7、rectanteroposteriorpositionofincisors Threeassumptions SymmetrySpaceanalysisEstimatingofuneruptedpermanentteethToothsizeanalysis Dentalcastanalysis MixDentitionEstimatingofUneruptedPermanentTeeth EstimatingofUneruptedPermanentTeeth Undistortedradiographicimage Compensateforenlargement Measurementoft
8、heteethonradiographs TruewidthofprimarymolarApparentwidthofprimarymolar Measurementoftheteethonradiographs TruewidthofuneruptedPremolarApparentwidthofuneruptedpremolar Accuracyisfairtogooddependingonthequalityoftheradiographsandtheirpositioninthearch Thetechniquecanbeusedinmaxillaryandmandibulararch
9、esforallethnicgroups Measurementoftheteethonradiographs EstimatingofUneruptedPermanentTeeth Moyersprediction Estimationfromproportionalitytables Measuringthemesiodistalwidthofthelowerincisors Predictionthesizeofboththelowerandupperuneruptedcaninesandpremolars Estimationfromproportionalitytables Nort
10、hernEuropeanwhitechildrenNoradiographsarerequired usedfortheupperorlowerarch Estimationfromproportionalitytables Estimationfromproportionalitytables EstimatingofUneruptedPermanentTeeth Combinationofradiographicandpredictiontable Itdepends Comparison Moyers Takana Johnston NorthernEuropeanwhitechildr
11、enNoradiographs DependingonthequalityoftheradiographsandtheirpositioninthearchForallethnicgroups SymmetrySpaceanalysisEstimatingofuneruptedpermanentteethToothsizeanalysis Dentalcastanalysis Althoughthenaturalteethmatchverywellinmostindividuals approximately5 ofthepopulationhavesomedegreeofdisproport
12、ionamongthesizesofindividualteeth ToothSizeDiscrepancy TSD ToothSizeAnalysis ToothSizeAnalysis BoltonRatio ToothSizeAnalysis 78 8 1 72 91 5 1 51 Aquickcheckfor Anteriortoothsizediscrepancy 2 2Posteriortoothsizediscrepancy 5 5Atoothsizediscrepancyoflessthan1 5mmisrarelysignificant ToothSizeAnalysis S
13、ymmetrySpaceanalysisEstimatingofuneruptedpermanentteethToothsizeanalysis Dentalcastanalysis AnalysisofDiagnosticRecords Cephalometricanalysisofdentofacialrelationships Dentalcastanalysis toevaluatespaceexcessordeficiencyandsymmetrywithinthedentalarches Theintroductionofradiographiccephalometricsisin
14、1934byHofrathinGermanyandBroadbentinUSA Cephalometricanalysis Function OriginalpurposeEvaluatingdentofacialproportionsandclarifytheanatomicbasisforamalocclusionObservingpathologicchanges Sometimes Researchingongrowthpatternsinthecraniofacialcomplex Thispatienthasfusionofthe1stand2ndcervicalvertebrae
15、 withtheodontoidprocessextendingintothemarginofforamen Function Function OriginalpurposeEvaluatingdentofacialproportionsandclarifytheanatomicbasisforamalocclusionObservingpathologicchanges Sometimes Recognizingandevaluatingchangesbroughtaboutbyorthodontictreatment Researchingongrowthpatternsinthecra
16、niofacialcomplex Function Thegoalofcephalometricanalysisistoevaluatetherelationships bothhorizontallyandvertically ofthefivemajorfunctionalcomponentsoftheface Cephalometricanalysis Cephalometricanalysis CranialBaseS N Po Ba BoMaxillaOr Ptm ANS PNS A UIMandibularCo Go B LI Pog Me Gn CephalometricLandmarks S sellaN nasionPo porionBa basionBo CephalometricLandmarks Or orbitalePtm ANS AnteriornasalspinePNSPosteriornasalspineA subspinaleUI UpperIncisor CephalometricLandmarks Co condylionGo gonionPog
