PURPOSE To compare the radiographic migration profiles of primary cementless total hip arthroplasty (THA) between patients with rheumatoid arthritis (RA) and those with osteoarthritis (OA). METHODS A total of 197 patients (215 hips) who underwent cementless THA for RA or OA between January 2001 and January 2013 and followed up for a minimum of 5.5 years were included. Ninety-four RA patients (109 hips) were compared with 103 OA patients (106 hips). Radiological evaluation was performed for acetabular cup loosening, and cup migration was measured using Einzel-Bild-Röntgen-Analyse (EBRA) software. Multiple variables were assessed to identify influencing factors for cup migration. RESULTS Early cup migration was observed in 13 hips (11.9%) in the RA group and four hips (3.8%) in the OA group, showing a significant difference (p = 0.041). Acetabular cup loosening occurred in three cups (2.8%) in the RA group and in one cup (0.9%) in the OA group, showing no significant difference (p = 0.321). Total cup migration was higher in the RA group (2.62 mm) than in the OA group (1.44 mm, p = 0.005). Total cup migration was significantly higher in patients aged < 50 years than in those aged > 50 years (p = 0.005). Rheumatoid factor (RF) and anti-cyclic citrullinated peptide (anti-CCP) antibody influenced total cup migration. Patients with seropositive RA showed significantly higher total cup migration and early cup migration incidence than those with seronegative RA (p = 0.005, p = 0.038, respectively). CONCLUSIONS Acetabular cups in primary cementless THAs of RA patients were less stable in terms of cup migration compared with that of OA patients.

中文翻译：

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类风湿关节炎原发性非骨水泥性全髋关节置换术后髋臼杯移位及其影响因素：与骨关节炎髋关节的比较研究。

目的比较类风湿关节炎（RA）和骨关节炎（OA）患者的原发性非骨水泥全髋关节置换术（THA）的放射学迁移特征。方法2001年1月至2013年1月间，共对197例（215髋）患者行RA或OA的非骨水泥性THA治疗，并至少随访5.5年。将94例RA患者（109髋）与103例OA患者（106髋）进行了比较。对髋臼杯的松动进行放射学评估，并使用Einzel-Bild-Röntgen-Analyse（EBRA）软件测量杯的移位。评估了多个变量以识别影响杯迁移的因素。结果在RA组中有13髋（11.9％）和OA组有4髋（3.8％）观察到了早期的杯状迁移，差异有统计学意义（p = 0.041）。RA组三杯（2.8％）和OA组一杯（0.9％）发生髋臼杯松弛，无显着差异（p = 0.321）。RA组（2.62 mm）的总杯迁移高于OA组（1.44 mm，p = 0.005）。<50岁的患者的总杯迁移明显高于> 50岁的患者（p = 0.005）。类风湿因子（RF）和抗环瓜氨酸肽（anti-CCP）抗体影响总杯迁移。血清阳性RA患者的总杯迁移和早期杯迁移发生率显着高于血清阴性RA患者（分别为p = 0.005，p = 0.038）。结论RA患者的原发性非骨水泥性THA中的髋臼杯与OA患者相比，杯迁移不稳定。