自制跟骨解剖型钢板与易断螺栓固定跟骨骨折的生物力学分析

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1、荚文摘要anatomicplateandpre—cutgudgeon．Theinteralfixationsystermdesignedbyourselvesfitsthestandardofidealfixationtothecalcaneusfracturesanditprovidessatisfactorytherapeuticefficacywithgoodqualityofminimalinvasion，validfixation,shortingthetimeoftheunionoffracture，etal，Whichcallbeusedforthe

2、managementofvariouskindstypeofintra-articularcalcaneusfractures．Weevaluatethetherapeuticefficacybythebiomechanicalcontrastexperimenttoprovidethefoundationandmeasureforimprovingtherapeuticefficacyandreducingthefailureofinternalfixation．Methods：sixteenfreshfootspecimenscontainingwholele

3、gwereused，allofwhichWel'egottenfromyoungandmiddle-agedpatientsamputatedbecauseofroadaccidentorosteosarcoma．Foreachspecimen,wedissectedthesurroundingstructuresofcalcaneuscarefullybutpreservedtheintegrityoftheanldecapsuleandthesurroundingligamentofthecalcaneus，thenwetransectedthespecime

4、nsfrom20centimeterssuperiort0malleous．Observationandradiographsofthespecimenswereobtainedtoensurethat廿1eywerefleeoftunlor，fracture，abnormityandvariationandthenthespecimenswererandomedintotwogroups，groupAandgroupB．everygrouphaveeightspecimenswhichwereplacedonthebiomechanicaltestingmach

5、inewiththefootfixedfirmlyonthebenchandthesuperiorpartfixedbyclamptocreatecompressionfracturesthroughaxisloadingtestofdamage．Itmustbeensuredthatallthespecimenswereverticallyloadedthroughthecenterofthe英文摘要tibiofibula．TheultimateloadingandtheultimatedisplacementoftheinstepwererecordedinA

6、group．ThenwecutonemicrostomiaattheposteriallateralcapsuleofthesubtalurjoinLwithawedgetoincreasethedisplacementandthewidthofthecalcaileusanditWasconfirmedthatthemodelof也ecalcaneusfractureWasSanderstype-IIbyX-ray，coronalCTscanand3-DCTreconstruction．ThemodelsofGroupAWerefixedbytheself-de

7、signedinternalfixationsystermandthemodelsofgroupBwasfixedbytheAOplateinternalfixationsysternaafterreduction．ThereductionofthefractureWasensuredbyX—ray．Anthesixteenspecimenswerefixed011thebiomechanicaltestingmachineasaboveafterreductionandfixationwiththeextensometerfixedinthemedialandl

8、atera