Cementation of a highly cross‐linked polyethylene liner into a well‐fixed acetabular shell provided a good durability for liner wear. However, its efficacy in treating recurrent instability due to malposition cup is less reported. The aim of this study is to evaluate the outcome of this surgical technique to treat hip instability. From 2009 to 2019, we have identified 38 patients who had been surgically treated for recurrent instability, including cementation liner (N = 20) and revision cup (N = 18) procedures. Patients were followed for a mean of 45.66 months. We have recorded and analyzed all causes of implant failure including recurrent instability. Clinical outcomes were assessed including complication and Harris Hip Score (HHS) preoperatively and at the latest follow‐up. Revision‐free survivorship for any cause was 95.0% at 1 year, and 84.4% at 5 years in cementation liner group and 88.9% at 1 year and 5 years in revision cup group. Mean Harris hip score improved from 48.3 points preoperatively to 79.5 points at the last follow‐up in cementation liner group and mean HHS improved from 43.3 points preoperatively to 77.2 points in revision cup group. There were two implant failures in each group, including one is due to persistent hip instability and the other is due to periprosthetic joint infection in the cementation liner group and two implant failure are due to persistent hip instability in the revision cup group. Functional scores and implant survival were similar in both groups. We demonstrated that orientation correction via the cementation of the polyethylene liner into well‐fixed acetabular shell is a promising option to treat and prevent instability.

中文翻译：

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将高度交联的聚乙烯衬垫粘合到固定良好的髋臼壳中以治疗全髋关节置换术后复发性脱位患者

将高度交联的聚乙烯内衬胶结到固定良好的髋臼壳中，为内衬磨损提供了良好的耐久性。然而，它在治疗由错位杯引起的复发性不稳定方面的疗效报道较少。本研究的目的是评估这种手术技术治疗髋关节不稳的结果。从 2009 年到 2019 年，我们确定了 38 名因复发性不稳定而接受手术治疗的患者，包括骨水泥衬里 ( N  = 20) 和翻修杯 ( N = 18) 程序。患者的平均随访时间为 45.66 个月。我们已经记录并分析了种植体失败的所有原因，包括反复出现的不稳定。评估临床结果，包括术前和最后一次随访时的并发症和哈里斯髋关节评分（HHS）。任何原因的无翻修存活率在 1 年时为 95.0%，骨水泥衬垫组在 5 年时为 84.4%，在翻修杯组中为 1 年和 5 年时为 88.9%。骨水泥衬垫组的平均 Harris 髋关节评分从术前的 48.3 分提高到最后一次随访时的 79.5 分，平均 HHS 从术前的 43.3 分提高到翻修杯组的 77.2 分。每组有两个种植体失败，其中一个是由于持续的髋关节不稳定，另一个是由于骨水泥衬垫组的假体周围关节感染，两个植入失败是由于翻修杯组的持续髋关节不稳定。两组的功能评分和种植体存活率相似。我们证明了通过将聚乙烯内衬粘合到固定良好的髋臼壳中来矫正方向是治疗和预防不稳定的有希望的选择。