半椎体脊柱侧弯后路矫形中横向连接装置作用的有限元分析-(5513)

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1、英文摘要FiniteelementanalysisofCross—linkDevice’sevaluationinthePosteriorsurgicalcorrectionofCongenitalScoliosiscausedbyHemivertebraABSTRACT【Jbjective：InordertoprovidethebasisforthechoiceofclinicaltreatmentofwhethertousetheCross—linkDevice(CLD)intheposteriorsurgicalcorrectionofCongenita

2、lScoliosis(CS)causedbyhemivertebrae．Athree—dimensionalFiniteelementmodelwasestablishedtosimulatedthecorrectionposteriorsurgeryofCongenitalScoliosis．ThemodelwasbasedonaninfantcongenitalscoliosischildwhichonetheT12isahemivertebra．Byloadingtheforceonthemodeltosimulatedthespinalbending，

3、laterbendingandrotation，weanalysistheevaluationofCLDinthecorrectionposteriorsurgery．Methods：1Choicethestudyobject：Selectachildwithcongentialscoliosiscausedbyhemivertebrae．Thechild’Smale，2years9months，heightwas90cmandweight14kg，who’sT12ishemivertebra．Informedhisfamiliesandwontheappro

4、val．2Gettheoriginalimages：Thechildlyingdown．Siemens64一sliceCTtransversescanninginsupinepositionwasdonefromthecervicalspinetothesacrum．Alltheostealstructureanddiscswerescaned．ThethickneSSwasdefinedas1．25mmandthereiSnoclearancebetweentwoscans．Obtained470CTimages(theformisdicom)．3Build

5、ingtheprimarymodel：ImportedtheseimagesintoMimics．Forgeneratingthethree—dimensionalmodel，wehavetomaskandsplittheoriginalimages，thencalculate3Dfromthemask．Atlast，wereaptheprimarymodel．ComparewiththeX-ray，themodelhasnosignificantdifference4英文摘要4Improvethemodel：PuttheprimarymodeInto3-Ma

6、tic5．1andcreatethevolumes，Ligamentumflavum，Supraspinousligament，Interspinousligament，．ThenusethesoftwareGeomagicStudio12．0tobuildingtheanteriorlongitudinalligament，posteriorlongitudinalligament，annulusfibrosusandnucleuspulposus．TheCLD，pediclescrewsandorthopedicrodsweremadebysoftware

7、Creo2．0．5Simulatingcorrectionsurgery：Bymeansofsoftware3-Matic5．1，wehadsimulatedthecorrectionposteriorsurgery．Afterresectedsomeligaments，weplacedthesepediclescrews，andthenremovedtheT12hemivertebrae，installedtheorthopedicrods，andclosedvertebralgapbetweentheT11andL1．There’Stwogroups，on

8、ehadfixedCLD．6Finit