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ID:19881140
大小:4.05 MB
页数:60页
时间:2018-10-07
《发育性髋关节脱位(英文)课件》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、DevelopmentalDysplasiaoftheHipHeatherRocheApril4,2002Previouslyknownascongenitaldislocationofthehipimplyingaconditionthatexistedatbirthdevelopmentalencompassesembryonic,fetalandinfantileperiodsincludescongenitaldislocationanddevelopmentalhipproblemsincl
2、udingsubluxation,dislocationanddysplasiaNormalGrowthandDevelopmentEmbryologicallytheacetabulum,femoralheaddevelopfromthesameprimitivemesenchymalcellscleftdevelopsinprecartilaginouscellsat7thweekandthisdefinesbothstructures11wkhipjointfullyformedacetabul
3、argrowthcontinuesthroughoutintrauterinelifewithdevelopmentoflabrumbirthfemoralheaddeeplyseatedinacetabulumbysurfacetensionofsynovialfluidandverydifficulttodislocateinDDHthisshapeandtensionisabnormalinadditiontocapsularlaxityThecartilagecomplexis3Dwithtr
4、iradiatemediallyandcup-shapedlaterallyinterposedbetweeniliumaboveandischiumbelowandpubisanteriorlyacetabularcartilageformsouter2/3cavityandthenon-articularmedialwallformbytriradiatecartilagewhichisthecommonphysisofthesethreebonesfibrocartilaginouslabrum
5、formsatmarginofacetabularcartilageandjointcapsuleinsertsjustaboveitsrimarticularcartilagecoversportionarticulatingwithfemoralheadoppositesideisagrowthplatewithdegeneratingcellsfacingtowardsthepelvicboneitopposestriradiatecartilageistriphalangedwitheachs
6、ideofeachlimbhavingagrowthplatewhichallowsinterstitialgrowthwithinthecartilagecausingexpansionofhipjointdiameterduringgrowthIntheinfantthegreatertrochanter,proximalfemurandintertrochantericportioniscartilage4-7monthsproximalossificationcenterappearswhic
7、henlargesalongcartilaginousanlageuntiladultlifewhenonlythinlayerofarticularcartilagepersistsDevelopmentcpn’tExperimentalstudiesinhumanswithunreducedhipssuggestthemainstimulusforconcaveshapeoftheacetabulumispresenceofsphericalheadfornormaldepthofacetabul
8、umtoincreaseseveralfactorsplayarolesphericalfemoralheadnormalappositionalgrowthwithincartilageperiostealnewboneformationinadjacentpelvicbonesdevelopmentofthreesecondaryossificationcentersnormalgrowthanddevelopmentoccurthroughbala
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