Tingart Markus, Lüring Christian, Bäthis Holger, Beckmann Johannes, Grifka Joachim, Perlick Lars
Department of Orthopaedic Surgery, University of Regensburg, Asklepios Klinikum, Kaiser Karl V Allee 3, 93077 Bad Abbach, Germany.
Knee Surg Sports Traumatol Arthrosc. 2008 Jan;16(1):44-50. doi: 10.1007/s00167-007-0399-4. Epub 2007 Sep 26.
Restoration of the mechanical leg axis and component positioning are crucial factors affecting long-term results in total knee arthroplasty (TKA). In a prospective study, 1,000 patients were operated on either using a CT-free navigation system or the conventional jig-based technique. Leg alignment and component orientation were determined on postoperative X-rays. The mechanical leg axis was significantly better in the computer-assisted group (95%, within +/-3 degrees varus/valgus) compared to the conventional group (74%, within +/-3 degrees varus/valgus) (P < 0.001). On average, the operating time was increased by 8 min in the computer-assisted group. No significant differences were seen between senior and younger surgeons regarding postoperative leg alignment and operating time. Computer-assisted TKA leads to a more accurate restoration of leg alignment and component orientation compared to the conventional jig-based technique. Potential benefits in long-term outcome and functional improvement require further investigation.
恢复下肢机械轴线和假体组件的定位是影响全膝关节置换术（TKA）长期效果的关键因素。在一项前瞻性研究中，1000例患者分别采用无CT导航系统或传统的基于夹具的技术进行手术。术后通过X线片确定下肢力线和假体组件的方向。与传统组（74%在±3度内翻/外翻）相比，计算机辅助组的机械下肢轴线明显更好（95%在±3度内翻/外翻）（P<0.001）。计算机辅助组的平均手术时间增加了8分钟。在术后下肢力线和手术时间方面，资深外科医生和年轻外科医生之间没有显著差异。与传统的基于夹具的技术相比，计算机辅助TKA能更准确地恢复下肢力线和假体组件的方向。长期疗效和功能改善方面的潜在益处需要进一步研究。
