Lionberger D, Walker P S, Granholm J
J Orthop Res. 1985;3(3):372-9. doi: 10.1002/jor.1100030314.
The effects of cemented acetabular components on the strains in the pelvis were determined experimentally. Four components were tested: A plain metal hemisphere; a metal hemisphere with a triflange; a hemisphere with an iliac peg; and a hemisphere with a complete flange and a peg. Loading was carried out in neutral, flexion, and extension directions. The subchondral bone was only slightly reamed, and components were cemented and tested successively. For the intact hip joint, the strains on the superior acetabular rim were much lower than those on the posterior rim. After placement of the components, the tensile strains on the rim decreased by 22-54% while the compressive strains increased by 0-25%. The bone on the medial inferior surface was subjected to 65% less tensile strain and 48% more compressive strain in neutral and extension loading. There were no great differences between the four styles of acetabular component.
通过实验确定了骨水泥型髋臼假体对骨盆应变的影响。测试了四种假体：一个普通金属半球；一个带三叶凸缘的金属半球；一个带髂骨钉的半球；以及一个带完整凸缘和钉子的半球。在中立位、屈曲和伸展方向进行加载。仅对软骨下骨进行轻微扩髓，依次对假体进行骨水泥固定并测试。对于完整的髋关节，髋臼上缘的应变远低于后缘的应变。放置假体后，边缘的拉伸应变降低了22% - 54%，而压缩应变增加了0% - 25%。在中立位和伸展加载时，内侧下表面的骨受到的拉伸应变减少65%，压缩应变增加48%。四种髋臼假体样式之间没有显著差异。
