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No difference in functional outcomes, quality of life and survivorship between metal-backed and all-polyethylene tibial components in unicompartmental knee arthroplasty: a 10-year follow-up study.
Knee Surgery, Sports Traumatology, Arthroscopy ( IF 3.8 ) Pub Date : 2020-08-20 , DOI: 10.1007/s00167-020-06247-3
Merrill Lee 1 , Daryl Cheng 1 , Jerry Chen 1, 2 , Lincoln Liow 1 , Ngai Nung Lo 1 , Seng Jin Yeo 1
Affiliation  

Purpose

The purpose of this study was to compare functional outcomes, quality of life and survivorship at a minimum of 10 years postoperatively, between MB and AP tibial components in fixed-bearing UKAs.

Methods

A retrospective cohort study of 146 Query Text="Author names: Please confirm if the author names are presented accurately and in the correct sequence (Lo Ngai Nung, Yeo Seng Jin). Also, kindly confirm the details in the metadata are correct." UKAs performed between 2004 and 2007 by a single fellowship-trained arthroplasty surgeon was carried out. 27 UKAs received MB tibial components and 119 UKAs received AP tibial components. The cohort was followed up prospectively for 10 years. Functional outcomes were compared using the Knee Society Functional Score (KSFS), Knee Society Knee Score (KSKS) and Oxford Knee Score (OKS). Quality of life measures were obtained from the Physical Component Summary (PCS) and Mental Component Summary (MCS), derived from the Short Form 36 Health Survey (SF-36). Propensity score matching was performed in a 1:3 ratio of MB versus AP tibial components to account for possible confounding variables. Thereafter, outcomes between the two groups were compared. The proportion of patients who had attained the minimum clinically important difference (MCID) for the abovementioned scores was recorded as well.

Results

After propensity score matching, there were 28 UKAs with MB tibial components and 76 UKAs with AP tibial components. There was no significant difference between the two groups in functional outcomes (KSFS, KSKS and OKS), quality of life (PCS and MCS) and survivorship (92.3% vs 91.1%, respectively) at a minimum of 10 years postoperatively. However, a significantly higher proportion of patients in the group with AP tibial components attained the MCID for PCS at 10 years postoperatively, compared to those with MB tibial components (p = 0.031).

Conclusion

In conclusion, there were no significant differences in functional outcomes measures, quality of life and survivorship between MP and AP tibial components at a minimum of 10 years postoperatively.

Level of evidence

III.



中文翻译:

在单间室膝关节置换术中,金属背衬和全聚乙烯胫骨组件在功能结果、生活质量和存活率方面没有差异:一项为期 10 年的随访研究。

目的

本研究的目的是比较固定轴承 UKA 中 MB 和 AP 胫骨组件术后至少 10 年的功能结果、生活质量和存活率。

方法

对 146 Query Text 的回顾性队列研究=“作者姓名:请确认作者姓名是否按正确顺序显示(Lo Ngai Nung、Yeo Seng Jin)。另外,请确认元数据中的详细信息是否正确。” UKAs 在 2004 年至 2007 年间由一名受过奖学金培训的关节成形术外科医生进行。27 个 UKA 接受了 MB 胫骨组件,119 个 UKA 接受了 AP 胫骨组件。该队列前瞻性地随访了 10 年。使用膝关节协会功能评分 (KSFS)、膝关节协会膝关节评分 (KSKS) 和牛津膝关节评分 (OKS) 比较功能结果。生活质量测量值是从物理成分总结 (PCS) 和精神成分总结 (MCS) 中获得的,这些总结源自 36 简表健康调查 (SF-36)。倾向得分匹配在 1 中进行:3 MB 与 AP 胫骨组件的比率,以解释可能的混杂变量。此后,比较两组之间的结果。还记录了上述评分达到最小临床重要差异 (MCID) 的患者比例。

结果

倾向评分匹配后,有 28 个 UKA 为 MB 胫骨假体,76 个 UKA 为 AP 胫骨假体。术后至少 10 年,两组在功能结果(KSFS、KSKS 和 OKS)、生活质量(PCS 和 MCS)和存活率(分别为 92.3% 和 91.1%)方面没有显着差异。然而,与使用 MB 胫骨组件的患者相比,AP 胫骨组件组在术后 10 年获得 PCS MCID 的比例显着更高(p  = 0.031)。

结论

总之,在术后至少 10 年,MP 和 AP 胫骨假体在功能结果测量、生活质量和存活率方面没有显着差异。

证据水平

三、

更新日期:2020-08-20
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