Department of Orthopaedics and Traumatology, Medical University of Innsbruck, Anichstrasse 35, 6020, Innsbruck, Austria.
Department of Experimental Orthopedics, Medical University of Innsbruck, Sonnenburgstr. 16, 6020, Innsbruck, Austria.
Arch Orthop Trauma Surg. 2021 Jan;141(1):149-154. doi: 10.1007/s00402-020-03648-4. Epub 2020 Oct 30.
The most common cause of failure in total hip arthroplasty (THA) is aseptic loosening. Uncemented cup migration analysis by EBRA (Einzel-Bild-Roentgen-Analyse) has shown to be a good predictive indicator for early implant failure if the cup migrates more than 1 milimeter (mm) within the first 2 years after surgery. In this study, we investigated the migration behaviour of an uncemented press-fit cup after 2 years follow-up.
Applying a retrospective study design, we reviewed all consecutive patients who received an uncemented press-fit cup at our Department between 2013 and 2018. A total of 484 patients were identified. We reviewed medical histories and performed radiological measurements using EBRA-Cup software. EBRA measurements and statistical investigations were performed by two independent investigators.
A total of 165 cups in 159 patients (female: 90; male: 69) met our inclusion criteria. Mean age at surgery was 66.7 (range 18.4-90.5) years. EBRA migration analysis showed a mean total migration of 0.7 mm (range 0.0-6.3) over our follow-up period of 2 years. Of the investigated cups, 53.2% showed less than 1 mm migration in the investigated follow-up period.
In conclusion, the Pinnacle cup used in our study provides low mean migration at final follow-up. Based on the assumption of secondary stabilization, good long-term outcome of the Pinnacle cup can be expected.
Number: 20181024-1875; Date: 2018-09-20.
全髋关节置换术（THA）失败的最常见原因是无菌性松动。如果术后 2 年内杯体移动超过 1 毫米（mm），EBRA（单张图像射线分析）的非骨水泥杯体迁移分析已被证明是早期植入物失败的良好预测指标。在这项研究中，我们研究了非骨水泥压配杯在 2 年随访后的迁移行为。
应用回顾性研究设计，我们回顾了 2013 年至 2018 年期间在我们部门接受非骨水泥压配杯的所有连续患者。共确定了 484 例患者。我们查阅了病史，并使用 EBRA-Cup 软件进行了放射学测量。EBRA 测量和统计分析由两名独立的研究人员进行。
共有 159 例患者的 165 个杯体（女性 90 例，男性 69 例）符合我们的纳入标准。手术时的平均年龄为 66.7 岁（范围 18.4-90.5 岁）。EBRA 迁移分析显示，在 2 年的随访期间，平均总迁移量为 0.7mm（范围 0.0-6.3mm）。在所研究的杯体中，53.2%在研究的随访期间显示出小于 1mm 的迁移。
总之，我们研究中使用的 Pinnacle 杯在最终随访时的平均迁移量较低。基于二次稳定的假设，可以预期 Pinnacle 杯具有良好的长期结果。
编号：20181024-1875；日期：2018 年 9 月 20 日。
