Department of Orthopaedic Surgery, Hyogo Rehabilitation Centre Center Hospital, 1070 Akebono-cho, Nishi-ku, Kobe 651-2181, Japan.
Knee Surg Sports Traumatol Arthrosc. 2011 Jul;19(7):1107-12. doi: 10.1007/s00167-010-1361-4. Epub 2011 Jan 14.
The aim of this study is to investigate the clinical results of total knee arthroplasty (TKA) using a navigation system after a minimum of 5 years.
Thirty cases of posterior-stabilized, TKA-implanted using a computed tomography-free navigation system were compared with 30 cases having matched TKA of the same type implanted via a classical, manual technique. At mid term, a minimum of 5 years after surgery, Knee Society scores (KSSs), Knee Society Functional scores (KSFSs), range of motion (ROM), and radiographic results of 27 patients in each group were assessed and reported in this study.
The accuracy of the implantations in relation to the coronal mechanical axis in the navigation group was superior to that of the manual group (P < 0.01). The femoral rotational profile revealed the prosthesis in the navigation group that was implanted with significantly less internal rotation than the manual group. Mid-term 5-year clinical results, including ROMs and KSSs, were significantly better in the navigation group (P < 0.01). KSFSs were equally good in both the groups.
Better alignment and similarity of good clinical results at mid-term follow up may provide patients who receive navigation TKA with long-term endurance of their implants. Further studies on longer-term outcomes and functional improvements are required to validate these possibilities.
本研究旨在探讨使用计算机断层扫描（CT）自由导航系统进行全膝关节置换术（TKA）的临床效果，随访时间至少为 5 年。
将 30 例采用 CT 自由导航系统的后稳定型 TKA 患者与 30 例采用传统手动技术的相同类型 TKA 患者进行匹配。中期随访时间至少为 5 年，对每组 27 例患者的膝关节学会评分（KSS）、膝关节学会功能评分（KSFS）、关节活动度（ROM）和影像学结果进行评估和报告。
导航组的植入物与冠状机械轴的准确性优于手动组（P < 0.01）。导航组的股骨旋转形态显示假体的内旋角度明显小于手动组。中期 5 年的临床结果，包括 ROM 和 KSS，在导航组中明显更好（P < 0.01）。KSFS 在两组中同样良好。
更好的对线和相似的中期临床结果可能为接受导航 TKA 的患者提供长期的植入物耐用性。需要进一步研究更长时间的结果和功能改善，以验证这些可能性。
