Ma Burton, Bergeron Stephane G, Grant Heather J, Rudan John, Antoniou John
Department of Computer Science and Engineering, York University, Toronto, Ontario, Canada.
Bull NYU Hosp Jt Dis. 2009;67(2):154-8.
This study used computer simulation to endeavor to quantify the relative degree of difficulty of resurfacing femora with pistol-grip deformities compared to relatively normal femora. Computer models of five pistol-grip femora and one relatively normal femur were computed from computed tomography (CT) scans of patients who had undergone computer-assisted hip resurfacing. A computer simulation of positioning the femoral resurfacing component on the femur was performed to count the number of acceptable configurations of the component on the femur. A high number of acceptable configurations implies that the surgeon has greater freedom, or greater margin for error, in implanting the component compared to a femur with a smaller number of acceptable configurations. We found that pistol-grip deformities dramatically reduce the number of acceptable configurations for valgus alignment, and that such configurations result in decreased femoral offset and increased depth of reaming.
本研究采用计算机模拟，试图量化与相对正常的股骨相比，对存在手枪柄畸形的股骨进行表面置换的相对难度程度。通过对接受计算机辅助髋关节表面置换患者的计算机断层扫描（CT）图像构建了五个手枪柄股骨和一个相对正常股骨的计算机模型。进行了将股骨表面置换部件定位在股骨上的计算机模拟，以计算该部件在股骨上可接受配置的数量。与可接受配置数量较少的股骨相比，大量的可接受配置意味着外科医生在植入部件时有更大的自由度或更大的误差范围。我们发现，手枪柄畸形显著减少了外翻对线时可接受配置的数量，并且这些配置会导致股骨偏心距减小和扩髓深度增加。
