前交叉韧带单束移植隧道对胫/股骨承载影响的正交实验

黄荣瑛; 许勇刚; 胡岩; 胡磊

文章摘要

黄荣瑛,许勇刚,胡岩,胡磊.前交叉韧带单束移植隧道对胫/股骨承载影响的正交实验[J].高技术通讯(中文),2010,20(2):168~174

前交叉韧带单束移植隧道对胫/股骨承载影响的正交实验

Orthogonal experiment on the influence of single tunnel on bone’s strength in anterior cruciate ligament reconstruction surgery

DOI：

中文关键词: 股骨，胫骨，移植隧道，正交实验，应力

英文关键词: femur， tibia， femoral and tibial tunnel， orthogonal experiment， stress

基金项目:国家科技支撑计划(2006BA103A16)和北京市科委2006年度科技计划重大项目(H060720050230)资助

作者	单位
黄荣瑛	北京航空航天大学机械工程及自动化学院
许勇刚	北京航空航天大学机械工程及自动化学院
胡岩	北京航空航天大学机械工程及自动化学院
胡磊	北京航空航天大学机械工程及自动化学院

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中文摘要:

利用膝关节处的密质骨和松质骨在CT成像中灰度值不同的特点，通过选取合适的阈值建立了含密质骨和松质骨的股骨和胫骨三维模型。同时，在视觉导航确定前交叉韧带(ACL)单束移植隧道起止点位置的条件下，按正交实验变换ACL移植隧道参数(孔径D、冠/矢状面上的倾角α/β)，构建了含隧道股骨/胫骨模型。正交实验分为5个水平，依据在直立位胫/股骨处于静平衡时以等力传递载荷的原则，分别对含隧道的股骨及胫骨施加等值压缩和弯曲载荷进行有限元分析，得到隧道参数对股骨和胫骨应力影响特性。正交实验表明，三个参数对含隧道股骨的应力影响不明显(应力增量≤793%)，但对含隧道的胫骨应力影响显著：受压缩载荷时冠/矢状面倾角α/β产生的应力增量分别达到3910% 和3688%，而受弯曲载荷时矢状面倾角β引起应力增量最大可达2466%。

英文摘要:

A three dimensional femur tibia model is built based on the use of the gray value difference between the compact bone and the cancellous bone in the knee joint under CT imaging and the selection of an appropriate gray threshold. Meanwhile, given the start and the end sites of the single anterior cruciate ligament (ACL) reconstruction tunnel obtained by visual navigation, the femur tibia containing the ACL reconstruction tunnel model is built according to three variables of the tunnel in the orthogonal experiment (pore diameter D, coronal plane angle α and sagittal plane angle β). This experiment is conducted in 5 levels, where based on the principle that the load force transfers isodynamically when the orthostatic femur and tibia are in static balance. The finite element analysis is carried out by applying the compressing and bending forces to the femur and tibia models respectively. The results show that the range of the three variables has little influence on femur’s stresses (less than 793%), but affects tibia’s stress significantly: stresses of coronal plane angle α and sagittal plane angle β increase up to 3910% and 3688% respectively under the compressing loads, and the contact stresses of sagittal plane angle β increase up to 24.66% under bending loads.

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