An analysis of tibial component design in total knee arthroplasty.
An analysis of tibial component design in total knee arthroplasty.
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全膝关节置换术中胫骨假体设计分析
DOI：
10.1016/0021-9290(83)90042-8
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发表时间：
1983
影响因子：
2.4
通讯作者：
Chang,TS
中科院分区：
文献类型：
--
作者：
Murase,K;Crowninshield,RD;Pedersen,DR;Chang,TS
提供了一个承受非轴对称载荷的胫骨近端和骨水泥型胫骨部件的轴对称有限元模型。型号变化包括聚乙烯部件和钢增强聚乙烯部件，带和不带中心固定柱。对35和70 mm的中心固定柱进行建模。发现单侧应用于胫骨部件的垂直方向电极导线通常会在结构的各个部件内产生最大幅度的峰值应力。预计在没有中央固定柱的胫骨部件上添加钢筋可显著降低聚甲基丙烯酸甲酯和下方松质骨内的应力水平。尽管在较小程度上，在钢加强型胫骨部件上增加相对较短的中心固定柱进一步降低了这些应力水平。较长的钢制中央固定柱可明显降低近端骨水泥和骨应力水平。预计胫骨部件髁宽度对聚甲基丙烯酸甲酯和松质骨应力的影响很小，除了宽钢加强部件可以降低胫骨近端松质骨压应力之外。
An axisymmetric finite element model of the proximal tibia and cemented tibial component subject to nonaxisymmetric loading is presented. Model variations included polyethylene components and steel reinforced polyethylene components both with and without a central fixation post. Central fixation posts of 35 and 70 mm were modeled. A vertically oriented lead applied unilaterally to the tibial component was found to generally cause the largest magnitude peak stresses within the various components of the structure. The addition of steel reinforcement to tibial components without central fixation post is predicted to significantly reduce stress levels within the polymethylmethacrylate and underlying cancellous bone. Although to a lesser extent, the addition of a relatively short central fixation post to the steel reinforced tibial component further reduced these stress levels. The longer steel central fixation post can appreciably reduce proximal cement and bone stress levels. The tibial component condylar width is predicted to have little effect on polymethylmethacrylate and cancellous bone stresses, with the exception that proximal tibial cancellous bone compressive stresses are reduced with wide steel reinforced components.