4-dimentional motion analysis for prevention of impingement related complications after total hip arthroplasty

在全髋关节置换术中，假体定位是避免假体撞击的重要因素。然而，关键信息一直缺乏最佳的杯子定位，如患者日常生活所需的髋关节活动范围，没有假体撞击的杯子安全区，以及植入杯子的盆腔参照系。采用4维运动分析和仿真技术，确定了杯子安全区极窄，功能性盆腔平面适合作为杯子的参照系。我们建议使用基于CT的导航系统，将撞击相关并发症的风险降至最低。

In total hip arthroplasty, implant orientation is important for avoiding prosthetic impingement. However, key information has lacked for optimal cup orientation such as patient hip range of motion needed for daily life, cup safe zone without prosthetic impingement among the range of motion and pelvic reference frame for cup implantation. We confirmed that cup safe zone was extremely narrow and that functional pelvic plane was suitable for reference frame for cup by using 4 dimensional motion analysis and simulation technique. We recommended using CT-based navigation system for minimizing risk of impingement related complications.