股骨头软骨下骨厚度与塌陷的相关性分析

《股骨头软骨下骨厚度与塌陷的相关性分析》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、研究论文theprogressandprovideareasonablebasisofretainningthethicknessofsubchondralbonewhentakingdebridementsurgeryMethods：Choose60femursofBritishLandracepigs，Femursweresawedunder4cmofgreatertrochanter，preservingthepartofthefemoralhead．Thepartofthefemoralheadaresawedalongthemediancoro

2、nalplaneusingpendulumsaws，preservingthesidewhichhasroundligament，TheBMDofthefemoralheadweretestedimmediatly．InordertoreducedifferencesinbiomechanicalpropertieseffectedbyBMD，weuserandomizedblockdesign．WemarkedthedatesofBMDfromsmalltolargeandputsixofsimilarBMDvaluesintooneblock．The

3、nweslectedtwofiguresasarandomnumberfromrandomnumbertable，whichwererankedbysize．Thenumber1-5ofeachblockweremadedintothefemoralheadnecrosismodelswiththesubchondralbonethicknessoflmm，2mm，3mm，4mm，5mm．Thenumber6wasanormalcontr01groupwithoutanytreatment．Makingmethods：Connectingthetwopo

4、intofmejunctionoftheheadandneck，from9．3O’clockonaverage13positionweretaked，wherethethicknessofsubchondralbonewasmeasuredaccuratlyandmarked．Thenallpointswereconnectedwitharc．111ecancellousbonewereremovedwithcrescentsawsalongthemarkandpolishedcarefully．Inordertoensuretheaccuracyofm

5、odels，weuseCalipertomeasurethethicknessofthefemoralheadatmanypartstimely．Allmodelsoffemoralheadnecrosiswilldo：①Toobserveimagingstudy：throughtheX—rayandCTtoobserve5研究论文whetherthethicknessofsubchondralboneofeachmodeliSconsistent②Todobiomechanicaltestofeachfemoralheadnecrosismodelto

6、obtainyieldload．AlldataswilbeexpressedinX±s．andanalyzedwithSPSS13．0statisticalsoftware．Results：(1)BonemineraldensityResults：Bonemineraldensitymeasurementsis0．307-4)．5209／cm：，themean4-standarddeviationis0．4174-0．041g／cm2．thereare14casesbetween0．307---0．3999／cm2，thereare38casesbetw

7、een0．400～0．4999／cm2and8casesabove0．5009／cm2．(2)Generalobservationafterbiomechanicaltest：Allspecimensofthefemoralheadcollapsedandsubchondralbonefractured．(3)Imagingstudyresults：Thethicknessofthesubchondralboneareuniformin1-5Groups．(4)Biomechanicalresults：Theyieldloadof1-6groupsare

8、：70．29±8．72、83．02±9．22、167．95±12．28、186．