中国组织工程研究与临床康复
中國組織工程研究與臨床康複
중국조직공정연구여림상강복
JOURNAL OF CLINICAL REHABILITATIVE TISSUE ENGINEERING RESEARCH
2008年
9期
1766-1770
,共5页
陆晴友%曲爱丽%王芳%吴岳嵩%王成焘
陸晴友%麯愛麗%王芳%吳嶽嵩%王成燾
륙청우%곡애려%왕방%오악숭%왕성도
股骨柄假体%有限元分析%生物力学%评价
股骨柄假體%有限元分析%生物力學%評價
고골병가체%유한원분석%생물역학%평개
背景:人工髋关节置换术前选择假体时,不仅要考虑在几何学上达到与患者股骨髓腔的匹配,而且还要在生物力学性能上达到最优,这对提高全髋关节置换术后疗效,具有较现实的意义.目的:对4组与股骨匹配的股骨柄假体进行生物力学的评价,寻找与正常股骨力学分布最为接近的股骨柄假体.设计:对比观察.单位:同济大学附属东方医院骨科、解放军第二军医大学长海医院骨科、上海交通大学机械与动力工程学院.材料:实验于2004-12/2005-10 在上海交通大学机械与动力工程学院生命质量与机械工程实验室完成.选用无髋部疾患、股骨近端形态正常志愿者(男性,40岁,身高175 cm,体质量78 kg)的股骨拍摄标准正位X射线片,并以DICOM格式存入存贮器中.志愿者签署知情同意书,同时报医学伦理委员会审批.模板:Ⅰ号假体:Zimmer versys Fiber Metal Taper11#;Ⅱ号假体:Plus APL 2#;Ⅲ号假体:Welink Ribbed system cementless11#:Ⅳ号假体:Lima F2L 1#.方法:在Matlab中导入股骨近端X射线正位片及4组股骨-股骨柄假体模板的bmp格式的图像文件,分别提取股骨、带假体模板的股骨二维轮廓数据,利用ANSYS软件建立股骨、股骨-股骨柄几何模型及二维非线性有限元模型,负荷加载后对股骨近端的应力分布进行分析、比较.主要观察指标:股骨近端的应力分布.结果:Ⅰ,Ⅳ号假体对所研究的股骨而言其应力大小及分布与正常股骨相近,但两者相比Ⅰ号更为接近,应为最佳选择.结论:通过基于X射线片与模板的股骨柄假体二维生物力学的分析比较,可对股骨柄假体的生物力学性能作出评价,为假体的优化选择提供依据.
揹景:人工髖關節置換術前選擇假體時,不僅要攷慮在幾何學上達到與患者股骨髓腔的匹配,而且還要在生物力學性能上達到最優,這對提高全髖關節置換術後療效,具有較現實的意義.目的:對4組與股骨匹配的股骨柄假體進行生物力學的評價,尋找與正常股骨力學分佈最為接近的股骨柄假體.設計:對比觀察.單位:同濟大學附屬東方醫院骨科、解放軍第二軍醫大學長海醫院骨科、上海交通大學機械與動力工程學院.材料:實驗于2004-12/2005-10 在上海交通大學機械與動力工程學院生命質量與機械工程實驗室完成.選用無髖部疾患、股骨近耑形態正常誌願者(男性,40歲,身高175 cm,體質量78 kg)的股骨拍攝標準正位X射線片,併以DICOM格式存入存貯器中.誌願者籤署知情同意書,同時報醫學倫理委員會審批.模闆:Ⅰ號假體:Zimmer versys Fiber Metal Taper11#;Ⅱ號假體:Plus APL 2#;Ⅲ號假體:Welink Ribbed system cementless11#:Ⅳ號假體:Lima F2L 1#.方法:在Matlab中導入股骨近耑X射線正位片及4組股骨-股骨柄假體模闆的bmp格式的圖像文件,分彆提取股骨、帶假體模闆的股骨二維輪廓數據,利用ANSYS軟件建立股骨、股骨-股骨柄幾何模型及二維非線性有限元模型,負荷加載後對股骨近耑的應力分佈進行分析、比較.主要觀察指標:股骨近耑的應力分佈.結果:Ⅰ,Ⅳ號假體對所研究的股骨而言其應力大小及分佈與正常股骨相近,但兩者相比Ⅰ號更為接近,應為最佳選擇.結論:通過基于X射線片與模闆的股骨柄假體二維生物力學的分析比較,可對股骨柄假體的生物力學性能作齣評價,為假體的優化選擇提供依據.
배경:인공관관절치환술전선택가체시,불부요고필재궤하학상체도여환자고골수강적필배,이차환요재생물역학성능상체도최우,저대제고전관관절치환술후료효,구유교현실적의의.목적:대4조여고골필배적고골병가체진행생물역학적평개,심조여정상고골역학분포최위접근적고골병가체.설계:대비관찰.단위:동제대학부속동방의원골과、해방군제이군의대학장해의원골과、상해교통대학궤계여동력공정학원.재료:실험우2004-12/2005-10 재상해교통대학궤계여동력공정학원생명질량여궤계공정실험실완성.선용무관부질환、고골근단형태정상지원자(남성,40세,신고175 cm,체질량78 kg)적고골박섭표준정위X사선편,병이DICOM격식존입존저기중.지원자첨서지정동의서,동시보의학윤리위원회심비.모판:Ⅰ호가체:Zimmer versys Fiber Metal Taper11#;Ⅱ호가체:Plus APL 2#;Ⅲ호가체:Welink Ribbed system cementless11#:Ⅳ호가체:Lima F2L 1#.방법:재Matlab중도입고골근단X사선정위편급4조고골-고골병가체모판적bmp격식적도상문건,분별제취고골、대가체모판적고골이유륜곽수거,이용ANSYS연건건립고골、고골-고골병궤하모형급이유비선성유한원모형,부하가재후대고골근단적응력분포진행분석、비교.주요관찰지표:고골근단적응력분포.결과:Ⅰ,Ⅳ호가체대소연구적고골이언기응력대소급분포여정상고골상근,단량자상비Ⅰ호경위접근,응위최가선택.결론:통과기우X사선편여모판적고골병가체이유생물역학적분석비교,가대고골병가체적생물역학성능작출평개,위가체적우화선택제공의거.
BACKGROUND:Prosthesis selection for total hip replacement is determined by geometrical matching with femoral medullary cavity of patients and the optimal biodynamics.It is of great significance for elevating outcomes of total hip replacement.OBJECTIVE:To evaluate the biomechanics of four groups of femoral stem prostheses matched with a femar and to get a stem whose mechanics distribution is similar to the normal femur.DESIGN:Controlled observation.SETTING:Department of Orthopaedics of Oriental Hospital Affiliated to Tongji University,Department of Orthopaedics of Changhai Hospital of Second Military Medical University of Chinese PLA,and Department of Mechanical and Power Engineering of Shanghai Jiao Tong University.MATERIALS:Experiments were performed at the Laboratory of Life Quality and Machinery Engineering of Department of Mechanical and Power Engineering of Shanghai Jiao Tong University from December 2004 to October 2005.A male volunteer aged 40 years with the normal proximal ferout(175 cm height and 78 kg weight),free from hip disease,were selected.X-ray image of the eutopic femar was shot and wrote into memory in the format of DICOM.The volunteer signed an infonned consent.The experiment was approved by Hospital Ethical Committee.No.Ⅰ prosthesis,Zimmer versys Fiber Metal Taperl 1#,No.Ⅱ prosthesis,Plus APL 2#,No.Ⅲ prosthesis,Welink Ribbed system cementless01#,and No.Ⅳprosthesis,Lima F2L 1# were used in this study.METHODS:The ezDICOM software was used to read files with DICOM format of femoral X-ray image,which was converted into files with bmp format.The image files with bmp format of the proximal femar X ray were introduced with Matlab software after regulation,and the two-dimensional contour data of femar were extracted.Prosthesis matched with the template was set in PhotoShop 7.0 software.The two-dimensional contour data of prosthetic femar were extracted in MATLAB software.The ANSYS software was used to establish the model of geometrical and two-dimensional nonlinearity finite element ncluding femur and femur-femoral stem.Stress distribution in the proximal femur was analyzed and compared by loading.MAIN OUTCOME MEASURES:Stress istribution of the proximal femur.RESULTS:Stress value and distribution of No.Ⅰ prosthesis and No.Ⅳ prosthesis in proximal femur were similar to the normal femar.Moreover,No.Ⅰ prosthesis was better than No.Ⅳ prosthesis.CONCLUSION:The biomechanics of femoral stem prostheses has been evaluated by analyzing and comparing the two-dimensional biomechanics of the femoral stem prostheses based on X-ray and template,which can offer support in optimal rosthesis selection.
