Cook S D, Klawitter J J, Weinstein A M
J Biomed Mater Res. 1980 Mar;14(2):133-44. doi: 10.1002/jbm.820140204.
A two-dimensional finite element model (FEM) was used to investigate the effect of various prosthesis design parameters on stresses along the proximal medial aspect of the femur. Strain calculations were compared to reported experimentally measured strains for an intact femur and femur containing a prosthesis in an effort to verify the FEM results. The results of the study indicated that stress levels in the medial aspect of the femur approaching those of the intact femur are possible with a device having an elastic modulus similar to bone. It was found that acrylic bone cement had little effect on stress profiles in the medial aspect when compared to stresses for devices utilizing a direct bone to implant attachment mechanism. It was also found that reduction in implant stem length and elastic modulus of tissue present at the prosthesis--bone interface could be used to increase stresses in the medial aspect; however, their effects were not as dramatic as reducing the elastic modulus of the stem material.
采用二维有限元模型（FEM）来研究各种假体设计参数对股骨近端内侧应力的影响。将应变计算结果与完整股骨以及植入假体的股骨的实验测量应变报告进行比较，以验证有限元模型的结果。研究结果表明，使用弹性模量与骨相似的装置，股骨内侧的应力水平有可能接近完整股骨的应力水平。研究发现，与采用骨与植入物直接附着机制的装置相比，丙烯酸骨水泥对内侧应力分布影响很小。还发现，缩短植入物柄的长度以及降低假体-骨界面处组织的弹性模量可用于增加内侧应力；然而，它们的效果不如降低柄材料的弹性模量那么显著。
