Purpose

Whether ultra-congruent (UC) or posterior cruciate ligament-stabilized (PS) inserts should be used in posterior cruciate ligament (PCL)-sacrificing total knee arthroplasty (TKA) remains debatable. Therefore, the aim of this prospective randomized controlled study was to compare the isokinetic performance and clinical outcomes of these inserts in PCL-sacrificing TKA.

Methods

Sixty-six patients diagnosed with primary knee osteoarthritis were randomly assigned to either the UC or the PS group. There were no significant differences between the groups in terms of age, body mass index or sex. The Knee Society score (KSS) and isokinetic performance results for each patient were recorded preoperatively and at 3, 6 and 12 months postoperatively. The physiatrist that performed the isokinetic tests and the patients were blinded to the study groups.

Results

There were no significant differences between the groups in terms of the preoperative KSS or isokinetic performance. Gradual improvement in the KSS was observed in both groups, but no significant differences were detected between the groups during the whole follow-up period. The UC and PS groups exhibited similar peak extension and flexion torque values normalized to body weight at 3, 6 and 12 months postoperatively (p > 0.05).

Conclusion

The use of UC or PS inserts in TKA did not affect the clinical outcomes or isokinetic performance.The clinical relevance of this study is that the potential differences in clinical outcomes and isokinetic performance between UC and PS inserts do not need to be considered when sacrificing the PCL in TKA.

Level of evidence

I.

中文翻译：

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交叉替代超全膝关节置换术和后稳定全膝关节置换术在临床结果或等速性能方面没有差异：一项随机对照试验。

目的

在后交叉韧带 (PCL) 牺牲型全膝关节置换术 (TKA) 中是否应使用超全等 (UC) 或后交叉韧带稳定 (PS) 插入物仍存在争议。因此，这项前瞻性随机对照研究的目的是比较这些插入物在 PCL 牺牲 TKA 中的等速性能和临床结果。

方法

66 名诊断为原发性膝关节骨关节炎的患者被随机分配到 UC 或 PS 组。各组之间在年龄、体重指数或性别方面没有显着差异。术前和术后 3、6 和 12 个月记录每位患者的膝关节协会评分 (KSS) 和等速运动结果。进行等速试验的理疗师和患者对研究组不知情。

结果

在术前 KSS 或等速表现方面，两组之间没有显着差异。观察到两组的 KSS 逐渐改善，但在整个随访期间组间未检测到显着差异。UC 和 PS 组在术后 3、6 和 12 个月表现出相似的峰值伸展和屈曲扭矩值（p  > 0.05）。

结论

在 TKA 中使用 UC 或 PS 插入物不影响临床结果或等速性能。本研究的临床相关性是在牺牲 UC 和 PS 插入物时无需考虑临床结果和等速性能的潜在差异TKA 中的 PCL。

证据水平

一世。