FINITE ELEMENT ANALYSIS OF TOTAL KNEE REPLACEMENT英文学习材料

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1、FINITEELEMENTANALYSISOFTOTALKNEEREPLACEMENTCONSIDERINGGAITCYCLELOADANDMALALIGNMENTJUNFENSHIAthesissubmittedinpartialfulfilmentoftherequirementsoftheUniversityofWolverhamptonforthedegreeofDoctorofPhilosophyJune2007Thisworkoranypartthereofhasnotpreviouslybe

2、enpresentedinanyformtotheUniversityortoanyotherbodywhetherforthepurposesofassessment,publicationorforanyotherpurpose(unlessotherwiseindicated).Saveforanyexpressacknowledgments,referencesand/orbibliographiescitedinthework,Iconfirmthattheintellectualcontent

3、oftheworkistheresultofmyowneffortsandofnootherperson.TherightofJunFenShitobeidentifiedasauthorofthisworkisassertedinaccordancewithss.77and78oftheCopyright,DesignsandPatentsAct1988.Atthisdatecopyrightisownedbytheauthor.Signature………………………………………..Date…………………

4、…………………………..AbstractAbstractThisresearchhasinvestigatedtheinfluenceofgaitcycle,malalignmentandoverweightontotalkneereplacementsusingafiniteelementmethod.Dynamicandfiniteelementmodelsoffixed-andmobile-bearingimplantshavebeencreatedandsolved;thefixed-andmob

5、ile-bearingimplantsdemonstrateddifferentperformanceonmovementandcontactpressuredistributioninthetibio-femoralcontactsurfaces.Morecontactareaswerefoundinthemobile-bearingimplantthaninthefixed-bearingimplant,butthemaximumcontactpressureswerealmostthesameinb

6、oth.Thethicknessofthetibialbearingcomponentinfluencedthefixed-andmobile-bearingimplantsdifferently.AdynamicmodelofanimplantedkneejointhasbeendevelopedusingMSC/ADAMSandMSC/MARCsoftware.Stressshieldingwasfoundinthedistalfemurintheimplantedkneejoint.Thestres

7、sesandstrainsinthedistalfemurwerefoundtoincreasewithbodyweight,especiallyduringthestancephase.Seriousstressshieldingandmorebonelossappearinconditionofoverweight.Theincreaseofbonelossrateandstressinthedistalfemurwithincreaseofbodyweightwillresultinahigherr

8、iskofmigrationoffemoralcomponentaftertotalkneereplacement.Thepegsizeeffecthasbeenstudiedusingthisdynamicmodel;alongerpegwithsmallerdiameterwasfoundtobethebest.Varus/valgusmalalignmentredistributedthetibio-femoralcon