2018OTA/AO(orAO/OTA)FractureandDislocationClassificationCompendiumAO分型历史•1996年，第一版AO分型在AOFoundationandtheOrthopaedicTraumaAssociation(OTA)合作下出版。•分型目的：astandardizedandrationalmethodologyofdescribingfracturesanddislocationaswellasamechanismtocodedataforfuturerecall1、2、3定位thecenteroffracture•Thelocationofthefractureisdeterminedbyfindingitscenter.Thisisdefinedasfollows:•Inasimplefracture,thecenterofthefractureisobvious(Fig3).•Inawedgefracture,thecenterisatthelevelofthebroadestpartofthewedge(Fig4).•Inafragmentarywedgeandamultifragmentaryfracture,thecentercanbedeterminedonlyafterreduction(Fig4).•Anydiaphysealfractureassociatedwithadisplacedarticularcomponentisconsideredanarticularfracture.•Ifafractureisassociatedwithanundisplacedfissurethatreaches•thejoint,itisclassifiedasametaphysealordiaphysealfracturedependingonitscenter.•Ifonebonehastwocompletelyseparatefractures,oneinthediaphysisandoneintheproximalordistalendsegments(eg,afemoraldiaphysisandafemoralneckfracture),eachfracturemustbeclassifiedseparately.AO编码原则Universalmodifiers（通用修饰语）•1Nondisplaced•2Displaced•3Impaction压缩（软骨、干骺端）•4Noimpaction•5Dislocation（a前、b后、c中心、d下、e外、f多方向）•6Subluxation/ligamentousinstability（a前、b后、c中心、d下、e外、f多方向）•7Diaphysealextension骨干延长？•8Articularcartilageinjury软骨损伤•9Poorbonequality•10Replantation再植•11Amputationassociatedwithafracture骨折所致截肢•12Associatedwithanonarthroplastyimplant合并非关节成型植入物•13Spiraltypefracture螺旋型骨折•14Bendingtypefracture屈曲型骨折Qualifications资格条件？Thefracturequalificationsaredescriptivetermsoffracturemorphologyorlocationthatarespecifictoeachfracture.2U1B1(d)2U1B1(e)2018完整AO编码骨折Example:Humerus,proximalendsegment,articularor4-partfracture,withmultifragmentarymetaphysealfractureandsimplearticularfracturewithananteriordislocation11C3.2(x)[5a]TheprocessofclassificationandcodingadiaphysealfractureTheprocessofclassificationandcodinganend-segmentfracture43、444343A143A243A343B143B243B343C144
