Hnat William P, Conway Justin S, Malkani Arthur L, Yakkanti Madhu R, Voor Michael J
Department of Mechanical Engineering, J.B. Speed School of Engineering, University of Louisville, Louisville, Kentucky, USA.
J Arthroplasty. 2009 Sep;24(6):957-62. doi: 10.1016/j.arth.2008.07.013. Epub 2008 Oct 9.
The purpose of this study was to show a change in proximal femur surface strains following total hip arthroplasty and after the addition of BoneSource hydroxyapatite bone cement in the proximal region of an instrumented femur and to measure the surface strain on the proximal body. Seven third-generation composite femurs (Pacific Research Laboratories, Vashon, Wash) were instrumented with 12 uniaxial strain gages, 6 gages on the anterior face, and 6 gages on the posterior face of each femur. All femurs exhibited stress shielding since the strains in the proximal region were drastically reduced. There was a large decrease in strain in the mid-shaft region and small changes in strain in the distal region. The surface strains on the modular implant were relatively low.
本研究的目的是展示全髋关节置换术后以及在模拟股骨近端区域添加骨源羟基磷灰石骨水泥后股骨近端表面应变的变化，并测量近端主体的表面应变。七根第三代复合股骨（太平洋研究实验室，华盛顿州瓦申）用12个单轴应变片进行测量，每根股骨前侧6个应变片，后侧6个应变片。由于近端区域的应变大幅降低，所有股骨均出现应力遮挡。骨干中部区域的应变大幅下降，远端区域的应变变化较小。模块化植入物上的表面应变相对较低。
