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首页> 外文期刊>Acta orthopaedica. >Migration of the uncemented Echo Bi-Metric and Bi-Metric THA stems: a randomized controlled RSA study involving 62 patients with 24-month follow-up
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Migration of the uncemented Echo Bi-Metric and Bi-Metric THA stems: a randomized controlled RSA study involving 62 patients with 24-month follow-up

机译:未解除的回声双度量和双公制Tha茎的迁移:随机对照RSA研究,涉及62例24个月随访的患者

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Background and purpose — Despite the good results after total hip arthroplasty (THA), new implants are continu- ously being developed to improve durability. The Echo Bi- Metric (EBM) THA stem is the successor to the Bi-Metric (BM) THA stem. The EBM stem includes many of the fea- tures of the BM stem, but minor changes in the design might improve the clinical performance. We compared the migra- tion behavior with radiostereometric analysis (RSA) of the EBM stem and the BM stem at 24 months and evaluated the clinical outcome. Patients and methods — We randomized 62 patients with osteoarthritis (mean age 64 years, female/male 28/34) scheduled for an uncemented THA to receive either an EBM or a BM THA stem. We performed RSA within 1 week after surgery and at 3, 6, 12, and 24 months. The clinical outcome was evaluated using Harris Hip Score (HHS) and Oxford Hip Score (OHS). Results — At 24 months, we found no statistically sig- nificant differences in migration between the two implants. During the first 3 months both the EBM and the BM stems showed visible subsidence (2.5 mm and 2.2 mm respec- tively), and retroversion (2.5° and 2.2° respectively), but after 3 months this stabilized. The expected increase in HHS and OHS was similar between the groups. Interpretation — The EBM stem showed a migration at 24 months not different from the BM stem, and both stems display satisfying clinical results.
机译:背景和目的 - 尽管总髋关节置换术(THA)后,仍有良好的效果,因此开发了新的植入物以提高耐用性。回声比度量(EBM)Tha茎是双公制(BM)Tha茎的继承者。 EBM茎包括BM茎的许多功能,但设计的微小变化可能会提高临床表现。与EBM茎的辐射静脉分析(RSA)与BM茎的偏热行为与24个月进行了比较,并评估了临床结果。患者和方法 - 我们随机调度62例骨关节炎(平均年龄64岁,女性/男性28/34),以接受ebm或bm tha茎。我们在手术后1周内进行RSA,在3,6,12和24个月内完成RSA。使用Harris Hip评分(HHS)和牛津髋关节评分(OHS)评估临床结果。结果 - 24个月,我们发现两种植入物之间的迁移没有统计上的差异。在前3个月内,EBM和BM茎均显示出可见的沉降(重新检查2.5毫米和2.2毫米),并重新溶解(分别为2.5°和2.2°),但在3个月后,这稳定了。群体之间的预期增加和ohs的增加相似。解释 - EBM茎在24个月内没有与BM茎不同的迁移,并且两种茎显示出满足临床结果。

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