Center for Orthopedic and Hand Surgery, University Hospital Strasbourg, 10 avenue Baumann, 67400, Illkirch, France,
Knee Surg Sports Traumatol Arthrosc. 2013 Dec;21(12):2764-9. doi: 10.1007/s00167-012-2178-0. Epub 2012 Aug 28.
The present study was designed to evaluate the mid-term (5- to 8-year) survival rate of a new total knee replacement (TKR) with a single-radius femoral component and a multidirectional, highly congruent tibial component, in comparison with an historical group (TKR with multi-radius design and fixed bearing).
Four hundred and thirty patients were included, of which 369 patients (86 %) completed the 5-year follow-up with Knee Society Score evaluation and radiograph examination (study group = 387, control group = 83).
There was a significant improvement for all analysed items between pre-operative status and late follow-up. Mean knee score was 93 ± 9 points in the study group and 88 ± 16 points in the control group (p < 0.001). Mean flexion angle was not different (118 ± 11 vs. 114 ± 13 degrees). Mean functional score was 87 ± 16 points in the study group and 71 ± 24 points in the control group (p < 0.001). Survival rate at 5-year follow-up was 98.8 % (vs. 98.0 %) for mechanical revisions only, and 96.4 % (vs. 98.1 %) for all revisions.
The new TKR allowed obtaining significantly better results than the fixed-bearing TKR. These results are in line with the best series published in the current literature, but there was no evidence of any superiority of this TKR against already published standards.
本研究旨在评估一种新型单半径股骨组件和多向高匹配胫骨组件的全膝关节置换术（TKR）的中期（5-8 年）生存率，与历史组（多半径设计和固定轴承的 TKR）进行比较。
共纳入 430 例患者，其中 369 例（86%）完成了 5 年随访，采用膝关节学会评分和影像学检查（研究组=387 例，对照组=83 例）。
所有分析项目在术前状态和晚期随访之间均有显著改善。研究组平均膝关节评分为 93±9 分，对照组为 88±16 分（p<0.001）。平均屈曲角度无差异（118±11° vs. 114±13°）。研究组平均功能评分为 87±16 分，对照组为 71±24 分（p<0.001）。5 年随访时，机械翻修的生存率为 98.8%（vs. 98.0%），所有翻修的生存率为 96.4%（vs. 98.1%）。
新型 TKR 可获得比固定轴承 TKR 显著更好的结果。这些结果与当前文献中发表的最佳系列结果一致，但没有证据表明该 TKR 优于已发表的标准。
