Abstract
Objective: We report clinical results and the X-ray findings in cementless total hip arthroplasty (THA) with a proximally porous-coated femoral stem for rheumatoid arthritis (RA) .
Methods: Between 1997 and 2006, 32 primary cementless THAs were conducted for RA in 27 patients. Of these, 21 (26 hips) were enrolled in this study a minimum of 9 months follow-up after surgery (mean, 41 months; range, 9-84 months) . Subjects were 1 man (1 hip) and 20 women (25 hips), with a mean age at surgery of 60 years (range, 46-78 years) . Clinical evaluation was made preoperatively and postoperatively using the JOA score. Postoperative radiographs were evaluated for loosening, sinking, pedestal, radiolucent line, stress shielding, canal-filling ratio, cortical hypertrophy and spot welds.
Results: JOA score improved from 30 to 71 points. The circumscribed radiolucent line was observed in 2 cups and 11 stems, but loosening was not observed in either. All components were thus stable and had bone ingrowth.
Conclusion: Cementless total hip arthroplasty with a proximally porous-coated femoral stem in patients with RA appears to be promising.
