计算机辅助术前计划在全髋关节置换术中的应用

Appfication of computer-aided design in preoperative planning in total hip replacement

目的探讨计算机辅助术前计划在全髋关节置换术中的优越性。方法2002年3月至2005年9月共筛选182例患者（208髋）参加本研究，随机分为两组，分别采用德国Preop Plan^TM计算机辅助术前计划系统及常规模板测量的方法进行全髋关节置换术术前计划，对比分析术后髋臼旋转中心的偏移量、两侧外展力臂差值及双下肢长度差值。所有患者平均随访时间3个月。结果与常规模板测量法相比，计算机辅助术前计划髋臼旋转中心的偏移量小、两侧外展力臂及下肢长度更接近平衡。结论计算机辅助术前计划提高了全髋关节置换术的精确度，更符合生物力学和生理学要求，具有推广价值。

Objective To investigate the advantages of using the preoperative computer-aided design system （CAD） in total hip replacement （THR）. Methods From March 2002 to September 2005, 182 patients who underwent primary THR were screened and divided into 2 groups randomly. CAD and traditional preoperative templating were used in preoperative planning respectively. Results In group using CAD, the migration of the center of acetabulum was smaller, and the discrepancy of the limb length and the abductor force lever arm were fewer. All the differences above were significantly different . Conclusions CAD helps remove much of the guesswork during surgery, and the implant can be more precise fitting to the patient. And equal limb lengths and balanced abductor force can be restored more accurately.