Haefeli Pascal C, Zwahlen Zinedine M, Baumgärtner Ralf, Link Björn-Christian, Beck Martin
Department of Orthopaedic and Trauma Surgery, Lucerne Cantonal Hospital, Spitalstrasse, Lucerne, Switzerland.
Orthopaedic Clinic Lucerne, Lucerne, Switzerland.
Hip Int. 2025 Mar;35(2):142-149. doi: 10.1177/11207000241304659. Epub 2025 Jan 8.
The RM Pressfit vitamys is an uncemented, titanium particle-coated, isoelastic monoblock cup made of vitamin E blended highly cross-linked polyethylene. We addressed the following questions: (1) What are the clinical and (2) radiographic outcomes 10 years after implantation? (3) What is the revision rate?
In this prospective observational study in a tertiary care centre we investigated all consecutive cases of total hip replacement with the RM Pressfit vitamys cup between September 2009 and November 2011. It was implanted in 162 hips, 49.4% in women. The mean age was 67.2 years (standard deviation [SD] 9.5), and the mean BMI was 27.3 kg/m (SD 4.7). In 153 cases (94.4%), primary or secondary osteoarthritis was the diagnosis. We evaluated preoperative and follow-up data at 6 weeks, 1, 5, and 10 years. A modified Harris Hip Score (mHHS), pain and satisfaction on a visual analogue scale (VAS), radiographic evaluation, complications and revision rate were investigated.
At the 10-year follow-up (mean 120.5 months, SD 1.4, range 118-126), 99 hips were available for clinical and radiographic evaluation. (1) The mean mHHS was 94.8 (SD 9.9), rest pain 0.2 (SD 0.6), load pain 0.5 (SD 1.5), and satisfaction 9.5 (SD 1.1). The mean improvement as compared to preoperatively was +33.7 (SD 16.8), -3.3 (SD 2.7), -6.0 (SD 2.4) and +5.7 (SD 2.5), respectively. (2) In the radiographic evaluation, no loose cups, no acetabular lucent lines, or acetabular osteolysis were seen. (3) 2 cups were revised, both due to malpositioning. The 10-year cumulative revision rate was 2.0% (95%CI, 0.0-4.2%). The implant survival rate with aseptic loosening as endpoint was 100%. No adverse events were reported.
At the 10-year follow-up, the RM Pressfit vitamys cup still had promising results with good clinical and radiographic outcomes and a low revision rate.
RM Pressfit vitamys髋臼杯是一种非骨水泥型、钛颗粒涂层、等弹性整体式髋臼杯，由维生素E混合的高度交联聚乙烯制成。我们探讨了以下问题：（1）植入10年后的临床结果如何？（2）影像学结果如何？（3）翻修率是多少？
在一家三级医疗中心进行的这项前瞻性观察研究中，我们调查了2009年9月至2011年11月期间所有连续使用RM Pressfit vitamys髋臼杯进行全髋关节置换的病例。共植入162例髋关节，其中女性占49.4%。平均年龄为67.2岁（标准差[SD]9.5），平均体重指数为27.3kg/m²（SD 4.7）。153例（94.4%）诊断为原发性或继发性骨关节炎。我们评估了术前以及术后6周、1年、5年和10年的随访数据。调查了改良Harris髋关节评分（mHHS）、视觉模拟量表（VAS）上的疼痛和满意度、影像学评估、并发症及翻修率。
在10年随访时（平均120.5个月，SD 1.4，范围118 - 126个月），99例髋关节可进行临床和影像学评估。（1）平均mHHS为94.8（SD 9.9），静息痛为0.2（SD 0.6），负重痛为0.5（SD 1.5），满意度为9.5（SD 1.1）。与术前相比，平均改善分别为+33.7（SD 16.8）、-3.3（SD 2.7）、-6.0（SD 2.4）和+5.7（SD 2.5）。（2）影像学评估中，未发现髋臼杯松动、髋臼透亮线或髋臼骨溶解。（3）2例髋臼杯因位置不当进行了翻修。10年累积翻修率为2.0%（95%CI，0.0 - 4.2%）。以无菌性松动为终点的植入物生存率为100%。未报告不良事件。
在10年随访时，RM Pressfit vitamys髋臼杯仍有良好的结果，临床和影像学表现良好，翻修率低。
