纵向生理加压外固定器治疗胫骨骨折的生物力学分析

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1、纵向生理加压外固定器治疗胫骨骨折的生物力学研究VerticalphysiologicalcompressionexternalfixationfortreatmentoftibialfracturesbiomechanicalstudyRenkun(OrthopaedicsandTraumaofTraditionalChineseMedicine)DirectedbySunYongqiangAbstractObjective:Longitudinalassessmentofphysiologicalcompressionexternalfixatorandunilateralext

2、ernalfixationafterthemulti-functionalbio-mechanicsindicatorsanddifferencesintherateofstressshielding.Methods:The8freshmoisttibialspecimensweretakeninyoungandmiddle-agedfreshfrozencorpsefortheaccidentandthesuddendeathofbraininjury.Andtheywereattheageof20to40yearsold.Theywereharvestedafter6hinaf

3、terthedeath,removalofallsofttissueandlocalanatomicalvariationsandchangesinbonemineraldensitycausedbydegenerativediseasesandcancerandmetabolicdiseasesanddeformities.Sealed,storedin-20°refrigeratorspare.Theywererandomlydividedintotestinggroupandcontrollinggroupandeachgrouphad4tibialspecimens.The

4、tibialspecimenstakenbefore6hoursweremadeintomiddlefracturewithwiresaw.Agroupwerefixedwiththephysiologicalpressureexternalfixatorandtheothergroupwerefixedwiththeunilateralmultifunctionalexternalfixator.Eachperformanceofbiomechanicswasdoneontestmachine.Atlast,weusedSPSS13.0softwarepackagetoanaly

5、zerelateddatagettingofexperiment.Physicalpressurebyexperimentthattheverticalexternalfixatorhasagoodbio-mechanicalproperties,boththeimplementationofbiologicalfixationofthefracture,butalsotoreducetheprocessoffixationoffixedpairsoflimbsofthestressshieldingeffect,itmayalsohaveacontinuingfracturest

6、ressstimulation,promotingfracturerecovery.Result:Verticalphysiologicalcompressionexternalfixatorandunilateralexternalfixationmultifunctionalmiddletransversefractureoftibiaspecimens,thestressanalysisshowedthatbothinstrength,stiffnessandstabilitywerenosignificantdifferences(P>0.05),canbeeffectiv

7、einfracturefixationhasgoodstability,earlytomeetthebasicneedsofthebearingleginlinewiththebiomechanicalpropertiesoffracturefixationrequirement.Stressshieldingrateweresignificantlydifferent(P2摘要<0.05),verticalphysicalpressureissuperiortoun