مرکز منطقه ای اطلاع رساني علوم و فناوري - Long-term results of total hip arthroplasty in patients with juvenile rheumatoid arthritis

Latin Abstract :

Objectives: We evaluated the long-term results of total hip arthroplasty (THA) in patients with juvenile rheumatoid arthritis (JRA). Methods: The study included 37 hips of 23 patients (22 females, 1 male; mean age 22 years; range 17 to 30 years) who underwent THA for hip degeneration secondary to JRA. All arthroplasties were performed through an ante- rolateral approach by the same senior surgeon. The mean body surface of the patients was 1.5 m2 (range 1.1 to 1.7 m2) and the mean symptom duration to surgery was 12 years (range 7 to 16 years). Twenty-three hips received ce-mented, 14 hips received hybrid prostheses. In seven hips with an extremely narrow femoral medulla and shallow acetabulum, a CDH prosthesis was used. The hips were evaluated using the Harris hip score. Prosthetic loosening and displacement and heterotopic bone formation were as¬sessed on follow-up radiographs. The mean follow-up pe¬riod was 135 months (range 58 to 212 months). Results: The mean Harris hip score increased from 27.2 (range 11 to 69) to 79.5 (range 37 to 87) postoperatively. At final follow-ups, all the patients were satisfied with the outcome and were able to walk without support. Three hips (8.1%; 3 patients) required revision. The overall Ka¬plan-Meier implant survival rate was 86.5%. There were no significant correlations between the Harris hip score and radiographic loosening and the presence of calcifica¬tion around the prosthesis. Heterotopic bone formation of grade I was observed in 17 hips (46%). Conclusion: Even though it is performed at young ages, THA considerably improves quality of life of patients with JRA having hip joint involvement and has a comparable implant survival.