Jang Taeho, Lee Kunwoo
1Seoul National University, Seoul, South Korea.
Surg Innov. 2014 Feb;21(1):80-9. doi: 10.1177/1553350613505917. Epub 2013 Oct 21.
Total knee arthroplasty (TKA) is a surgical method for replacing a degenerated or diseased knee joint that can no longer perform daily functions with an artificial knee implant. In TKA, the artificial knee implant should be inserted such that it aligns well with the mechanical axis of the leg. Thus, precise bone cutting is essential. To improve TKA outcomes, a registration process is performed to locate the predetermined bone cutting area by calculating the position and posture of the femur and tibia. In this article, we propose a patient-specific registration guide that is able to significantly reduce registration time and effort without loss of accuracy. Furthermore, the patient-specific registration guide can be implemented with real-time registration, allowing continuous surgical information to be provided without the insertion of any tracking devices. The precision and accuracy of the proposed registration guide were confirmed through animal tests with a digitizer, stereo camera, and linear motion generator. The error of our registration method, including measurement and guide attachment errors, reached a maximum of 0.321 mm for one pair of cow legs.
全膝关节置换术（TKA）是一种通过人工膝关节植入物替换已无法执行日常功能的退化或患病膝关节的手术方法。在全膝关节置换术中，人工膝关节植入物的插入应使其与腿部的机械轴良好对齐。因此，精确的骨切割至关重要。为了改善全膝关节置换术的效果，需进行配准过程，通过计算股骨和胫骨的位置与姿态来定位预定的骨切割区域。在本文中，我们提出了一种针对患者的配准导向器，它能够显著减少配准时间和工作量，同时不损失准确性。此外，针对患者的配准导向器可通过实时配准来实现，无需插入任何跟踪设备即可提供连续的手术信息。所提出的配准导向器的精度和准确性通过使用数字化仪、立体相机和直线运动发生器进行的动物测试得到了证实。我们的配准方法的误差，包括测量误差和导向器附着误差，对于一对牛腿而言，最大达到了0.321毫米。
