Bailey Chris, Gul Rehan, Falworth Mark, Zadow Steven, Oakeshott Roger
Sportsmed SA, 32 Payneham Road, Stepney, Adelaide, SA 5069, Australia.
Clin Orthop Relat Res. 2009 Apr;467(4):917-22. doi: 10.1007/s11999-008-0584-x. Epub 2008 Oct 30.
The use of computer navigation during hip resurfacing has been proposed to reduce the risk of a malaligned component and notching with subsequent postoperative femoral neck fracture. Femoral component malalignment and notching have been identified as the major factors associated with femoral neck fracture after hip resurfacing. We performed 37 hip resurfacing procedures using an imageless computer navigation system. Preoperatively, we generated a patient-specific computer model of the proximal femur and planned a target angle for placement of the femoral component in the coronal plane. The mean navigation angle after implantation (135.5 degrees) correlated with the target stem-shaft angle (135.4 degrees). After implantation, the mean stem-shaft angle of the femoral component measured by three-dimensional computed tomography (135.1 degrees) correlated with the navigation target stem-shaft angle (135.4 degrees). The computer navigation system generates a reliable model of the proximal femur. It allows accurate placement of the femoral component and provides precise measurement of implant alignment during hip resurfacing, thereby reducing the risk of component malpositioning and femoral neck notching.
有人提出在髋关节表面置换术中使用计算机导航技术，以降低组件排列不齐和出现缺口并继发术后股骨颈骨折的风险。股骨组件排列不齐和出现缺口已被确定为髋关节表面置换术后股骨颈骨折的主要相关因素。我们使用无图像计算机导航系统进行了37例髋关节表面置换手术。术前，我们生成了患者特异性的股骨近端计算机模型，并规划了股骨组件在冠状面放置的目标角度。植入后的平均导航角度（135.5度）与目标柄干角（135.4度）相关。植入后，通过三维计算机断层扫描测量的股骨组件平均柄干角（135.1度）与导航目标柄干角（135.4度）相关。计算机导航系统生成了可靠的股骨近端模型。它允许准确放置股骨组件，并在髋关节表面置换术中提供植入物对齐的精确测量，从而降低组件位置不当和股骨颈出现缺口的风险。
