University of Iowa, Iowa City, Iowa.
University of Iowa, Iowa City, Iowa; VA Medical Center, Iowa City, Iowa.
J Arthroplasty. 2014 Oct;29(10):1961-9. doi: 10.1016/j.arth.2014.05.008. Epub 2014 May 15.
Long term total hip arthroplasty follow-up has demonstrated bearing surface wear and failure of fixation as the major modes of failure. The purpose of this study was to evaluate the minimum 10year results of a third generation cementless acetabular component using moderately cross-linked polyethylene liners. 150 primary THAs were evaluated clinically for need for revision and activity evaluated using accelerometers, WOMAC, Tegner and UCLA activity-level scores. Radiographs were evaluated for wear, osteolysis and loosening. We compared this cohort to three of our previously reported cohorts. The only revision was unrelated to liner wear and all acetabular components were bone ingrown. There were no cases of acetabular osteolysis and one case of femoral osteolysis. Average steps per year were 1.59 million. Mean steady state wear rate averaged 0.04mm/year. At 10-years, excellent fixation and low wear were demonstrated using a cementless acetabular construct and moderately cross-linked polyethylene liner.
Therapeutic study, Level III (retrospective comparative study-prospective cohort with historical control).
长期全髋关节置换术的随访结果表明，轴承面磨损和固定失败是主要的失效模式。本研究的目的是评估第三代非骨水泥髋臼组件使用中度交联聚乙烯衬垫的至少 10 年结果。对 150 例初次全髋关节置换术进行临床评估，以确定需要翻修的情况，并使用加速度计、WOMAC、Tegner 和 UCLA 活动水平评分评估活动情况。对X 线片进行磨损、骨溶解和松动评估。我们将这一组与我们之前报告的三组进行了比较。唯一的翻修与衬垫磨损无关，所有髋臼部件均与骨长入。无髋臼骨溶解病例，股骨骨溶解 1 例。平均每年步数为 150 万步。平均稳态磨损率平均为 0.04mm/年。在 10 年时，使用非骨水泥髋臼结构和中度交联聚乙烯衬垫，证明了固定良好和低磨损。
治疗研究，III 级（回顾性比较研究-前瞻性队列研究与历史对照）。
