The Clinical Research of Total Hip Arthroplasty for Ankylosing Spondylitis Hip Joint Disease

Abstract：Objective To evaluate the clinical results of the total hip replacement in the patients with ankylosing spondy-litis. Methods A total of 20 ankylosing spondylitis patients(27 hip joints)underwent total hip replacement. All the patients had obvious restriction in daily life before operation:7 cases had to walk with the help of crutches,4 cases had to sit on wheel-chair,and 8 cases(11 hip joints)were stiff. The range of motion of the hip joint,the Harris score,and the postoperative compli-cations were compared and analysed in this study. Additional spinal operation for their kyphosis was required in 1 patient. Re-sults The patients were followed up for an average age of 4. 2 years(ranged from 1. 2 to 7. 8 years)in our department. The pain was completely released in 23 hips(85. 2% )at the last time of follow-up. Only one patient still needed two crutchs to walk. The mean Harris score was 14. 9 averagely and the mean total range of the hip joint movement was 40°before surgery. The Harris score of hip joint was 82. 9 averagely,including 8 hips excellent,10 good,7 possible,and 2 poor,with an excellent and good rate of 74. 1% . The mean total range of the hip joint movement was 190. 5°after surgery. 4 hips(14. 8% )appeared hetero-topic ossification in all patients according to Brooker's calssification,one was of Class Ⅱ and the other ClassⅢ,and 1 hip ap-peared aseptic loosening. Conclusion The total hip replacement is an effective solution for the treatment of affected hip with ankylosing spondylitis. It can relieve the pain of the joint,restore the hip function and improve the life of the patients with an-kylosing spondylitis.