Establishment of evaluation standards for stems fixation by stress and displacement between prostheses stems and femoral tissue

虽然已经分析了轮廓与固定部位应力或微动之间的关系，但尚未建立股骨柄设计指南。采用显式三维有限元法分析了人工关节固定部位的接触应力。根据结果阐明了临床上变得重要的特定部位的初始固定情况。本研究强调了关节假体固定部位的力学不稳定性，因此建议无条件推荐关节假体固定部位更大面积的一般想法应予以修订。

Although the relationship between the contour and stress or micro-motion at the fixation site has been analyzed, guidelines on stem design have not been established. Contact stress at the fixation site of a joint prosthesis was analyzed by an explicit three-dimensional finite element method. The situation of the initial fixation about the specific part which becomes important clinically based on the results was clarified. This study highlights the mechanical instability of the fixation site of joint prostheses, and thus suggests that the general idea that unconditionally recommends a larger area for the fixation site of joint prostheses should be revised.