title: Primary total hip arthroplasty in patients with ankylosing spondylitis.
abstract: The results of total hip arthroplasty in a group of patients with ankylosing spondylitis are described. Ninety-five arthroplasties were performed in 56 men and 2 women whose average age at operation was 38.9 years (standard deviation [SD], 11.6; range, 19.2-78.8). They were followed for an average of 135.4 months (SD, 81.6; range, 24.4-331.2). We encountered 4 deep infections necessitating the removal of prostheses. Two of 3 dislocations were anterior dislocations. Nineteen arthroplasties were revised at an average of 162.0 months (SD, 49.6; range, 55.1-250.5) after the primary surgery; 9 of them had only the acetabular component revised because of aseptic loosening. Hyperextension of the hips is a common phenomenon that can lead to surgical error and predispose the prosthesis to anterior dislocation.
authors.affiliation: Department of Orthopaedic Surgery, The University of Hong Kong, Pokfulam, China.
authors.forename: W M
authors.initials: WM
authors.lastname: Tang
authors.forename: K Y
authors.initials: KY
authors.lastname: Chiu
mesh_terms: D000328:Adult; D019644:Arthroplasty, Replacement, Hip; D005260:Female; D005500:Follow-Up Studies; D006621:Hip Joint / Q000000981:diagnostic imaging; D006622:Hip Prosthesis; D006801:Humans; D008297:Male; D011183:Postoperative Complications / Q000453:epidemiology; D011475:Prosthesis Failure; D011859:Radiography; D012086:Reoperation; D013167:Spondylitis, Ankylosing / Q000503:physiopathology / Q000601:surgery*; D013997:Time Factors; D016896:Treatment Outcome