骶1骶骨翼螺钉钉道长度与骨密度关系的影像学分析

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1、万方数据浙江大学硕士学位论文中文摘要学意义(P>0．05)，进行标准化处理，标准化后相对应通道平均骨CT值仍无统计学差异(P>0．05)。男女样本合并后，标准化后SCTA与SCTB、SCTC分别比较差异均有统计学意义(P

2、ewsinRelation．totheBoneDensity：AComputedTomographyStudyZhejiangUniversityPostgraduatecandida：teSurgery(Orthopaedics)LiuhanSupervisorChenQixinABSTRACTobiective：ToinvestigatetherelationbetweenthechannelofanterolateralS1sacrumalaescrewandthebonedensitybycomputedtomography(CT)．statisticalanalys

3、isvariousparametersofthechanneloftheanterolateralS1sacrumalaescrewofweremeasured，andstatisticalanalysiswereperformed，whichprovidedtheoreticalsupportforthemaximallengthofthechannelofanterolateralS1sacrumalaescrew．Method：CTimagesofthesacrumwerecollectedfrom40patients(1umbardischerniation)，inc

4、luding20femalesand20males，withtheagerangingfrom40to65(Theaverageagewas52．75)yearsold，whodidnothaveanycongenitalanomalyorpathologicaldeformityaroundsacrum．Athree—dimensional(3D)imageofthesacrumwasreconstructedonthecomputerusingtheprogramMMWP．Basedonthree．dimensional(3D)CTreconstructions，virt

5、ualchannelsofanterolateralSlsacrumalaescrewwereidentifiedandmeasured．S1screwentrypointwassetastheintersectionoflineswhereextensionoftheL5／S1facetjointlmminferiormarginandlmmlateralmargincrossover．Themaximallengthofthechannel(channelA)ofanterolateralS1sacrumalaescrewwasmeasuredbyrotatingthe3

6、Dsacrum，whichwas万方数据浙江大学硕士学位论文英文摘要inthestudyplane(planeO、．Andcaudalangulationonthesagittalplanewassagittalangle(SA)．Forexample，in．therightsideofthesacrum，S1screwentrypointwassetasthecenter，thenwegotchannelBafter100clockwiserotmion，channelCafteranother10。．Lateralangulationonthetransverseplan

7、ewastransverseangle(TA)，andwegotTAA，TAB，TAC．SothelengthwasrespectivelyLA，LB，LC，andtheboneaverageCTvalueswasCTA，CTB，CTC(StandardizedtheaverageCTvalue，wegotSCTA，SCTB，SCTC)．UsingSPSS19．0softwareforstatisticalanalysis，wemadecomparisonswiththeparametersbetwee