Brown T D, Shaw D T
J Orthop Res. 1984;2(2):190-9. doi: 10.1002/jor.1100020210.
Contact stress distributions were measured across the tibiofemoral joints of 11 fresh-frozen normal cadaver specimens. Local stress magnitudes were sensed by arrays of miniature piezoresistive transducers inset superficially in the cartilage of the femoral condyles. Knee joints were tested at 0, 10, 20, and 30 degrees of flexion and later retested at 0 degrees following medial and dual meniscectomies. For the intact joint, both the spatial mean and peak local contact stresses rose approximately linearly with the joint resultant, reaching levels of 2.6 and 8.0 MPa, respectively, at 3 kN of applied loading. Flexion angle variations in the range studied failed to cause significant changes in the major contact parameters. Although meniscectomies involved contact area reductions and consequent stress increases, such effects were more moderate than results previously seen for static loading of the tibial plateau.
在11个新鲜冷冻的正常尸体标本的胫股关节上测量了接触应力分布。局部应力大小由浅埋在股骨髁软骨中的微型压阻式传感器阵列感测。膝关节在0、10、20和30度屈曲时进行测试，然后在内侧半月板切除术和双侧半月板切除术后在0度再次测试。对于完整的关节，空间平均接触应力和局部峰值接触应力均随关节合力大致呈线性增加，在施加3kN载荷时分别达到2.6MPa和8.0MPa的水平。在所研究的屈曲角度范围内，屈曲角度的变化未能引起主要接触参数的显著变化。虽然半月板切除术涉及接触面积减小和随之而来的应力增加，但这种影响比先前在胫骨平台静态加载时看到的结果更为温和。
