Schwarzkopf Ran, Dong Nick N G, Fetto Joseph F
Department of Orthopaedic Surgery, NYU Hospital for Joint Diseases, New York, New York, USA.
Bull NYU Hosp Jt Dis. 2011;69(4):292-7.
Hip resurfacing arthroplasty has been developed as an alternative to traditional total hip arthroplasty, in an effort to minimize the loss of native bone in young patients with symptomatic hip osteoarthritis. Femoral neck fracture following hip resurfacing is a unique complication; several risk factors are associated with this complication, including female gender. In the present study, we used finite element models of the proximal femur to simulate stresses across the femoral neck in pelvis models with varying widths. This analysis demonstrated an increase in hip reaction forces as the width of the pelvis increases, a condition that simulates a resurfacing condition in a female pelvis. This difference in peak stress on the femoral neck may explain the increased incidence of femoral neck fractures seen in female patients following hip resurfacing.
髋关节表面置换术已被开发出来作为传统全髋关节置换术的替代方法，旨在尽量减少有症状的髋关节骨关节炎年轻患者的自体骨丢失。髋关节表面置换术后股骨颈骨折是一种独特的并发症；有几个风险因素与这种并发症相关，包括女性性别。在本研究中，我们使用股骨近端的有限元模型来模拟不同宽度骨盆模型中股骨颈的应力。该分析表明，随着骨盆宽度增加，髋关节反应力增加，这种情况模拟了女性骨盆中的表面置换情况。股骨颈峰值应力的这种差异可能解释了髋关节表面置换术后女性患者股骨颈骨折发生率增加的原因。
