Department of Orthopaedic Surgery, Hospital General Elda, Ctra Elda-Sax s/n, 03600 Elda, Alicante, Spain.
J Arthroplasty. 2012 Feb;27(2):207-12. doi: 10.1016/j.arth.2011.05.021. Epub 2011 Jul 12.
A prospective, randomized, controlled, double-blind trial was performed to compare outcomes between 61 mobile- and 58 fixed-bearing primary TKAs in patients aged 70 years or older. At last follow-up, no difference was found for Knee Society score. The mobile-bearing group had greater knee flexion at 3 and 6 months, but this was similar at 2 years. The patient satisfaction was better in the mobile-bearing group than in fixed-bearing group, with respect to Knee Society functional score, Western Ontario MacMasters University score, Short-Form 12 score, and visual analog scale score. A multivariate analysis confirmed that the only independent factors predictive of postoperative quality of life were early postoperative flexion. We believe that better perception and satisfaction with mobile-bearing in older patients was due to the earlier regain of their knee flexion. Our results justify the use of mobile-bearing design in the older population.
一项前瞻性、随机、对照、双盲试验比较了 61 例年龄在 70 岁及以上的移动和 58 例固定轴承初次 TKA 的结果。末次随访时，膝关节协会评分无差异。在 3 个月和 6 个月时，活动轴承组的膝关节屈曲度更大，但在 2 年时相似。在膝关节协会功能评分、西安大略大学麦克马斯特大学评分、短格式 12 评分和视觉模拟评分方面，活动轴承组的患者满意度优于固定轴承组。多变量分析证实，术后生活质量的唯一独立预测因素是术后早期的屈曲度。我们认为，老年患者对活动轴承的感知和满意度更好，是因为他们更早地恢复了膝关节的屈曲度。我们的结果证明了在老年人群中使用活动轴承设计的合理性。
