胫骨短节段髓内钉的设计与生物力学分析

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1、万方数据motion．Ifthesofttissuesconditionaroundthenailenterpointispooratthesametime，intramedullaryfixationusingthetraditionalapproachwilldramaticallyincreasethepossibilityofwoundinfection，osteomyelitis，andnonunion．Conventionalintramedullarynailsarelonger，acrosstheisthmusoflongtubularbone，thenailc

2、aneasilyleadtothenaildeforrnaionduringinserts，resultingindistallockingdifficulty，prolongedoperativetimeandincreasedradiationexposureinmedicalpersonnelandpatients．Therefore，wedesignedanewshort—segmenttibiaintramedullarynail，andcomparetheintramedullarynailwiththeclassicAOcompanyafterfractureof

3、tibialintramedullarynailingfixationofbiomechanics，inhopesofbettertreatmenteffectcanbeachieved．Methods：12adultspecimens(SichuanMedicaluniversityAnatomyteachingandresearchsectionproVided)include10menand2woman．Averageageofdeathwas42years(35—50yearsold)．Afteracquiringthelowerlimbs，removalthesurr

4、oundingmuscles，tendons，ligamentsandothersofttissues；dissecttheinferiortibiofibularjoint，removethemeniscusattachment．Deformities，oldfracture，osteoporosis，bonecancerandotherdiseasesoftheskeletalsystemareexcludedbyvisualizingandXraycheck．24tibiaspecimensweretakenbynumber(1th一8th)，andrandomnumbe

5、randspecimensisdividedintogroupAandB，twogroups．GroupAisappliedwithconventionalinterlockingintramedullarynailfortibialfixation(controlgroup)．GroupBusesnewtypeshortsegmentoftibiaintramedullarynailfixation(theexperimentalgroup)．Fromadultcadaversachievedabovethearticularsurfaceofthedistaltibia，t

6、ibia5万方数据8rootspecimenabout12cmrampagesusingthewiresawcutoffpreparedtibialfracturemodel．IntibialslopeCenterOffice，withopeningsfortheopening，followedbyreamingwithdifferentdiameters，graduallyexpandingthetibialintramedullarycavityandimplantedthechamberreamedintramedullarynailingofthesmalltmm，ra

7、yconfirmedintramedullarynaildistalendabovetheankle，intoandthenthroughthesightsarefixedandlockedintramedullarynailfarproximallockingscrews．Aftertwogroupsofspecimenswerefixedinbiomechanicaltestingmachine，respectivelyforthree—pointbendingtest，axialcom