title: Change in pelvic tilt angle 2 to 4 years after total hip arthroplasty.
abstract: The purpose of this study was to evaluate the change in pelvic tilt angle (PA) in the sagittal plane in the standing and supine positions for 2 to 4 years after total hip arthroplasty (THA). Anteroposterior pelvic radiographs of 21 male and 65 female patients were investigated before and after THA yearly over 2 to 4 years. Both the standing and supine PA significantly posteriorly tilted after THA. The difference in PA between the standing and supine positions (dPA) significantly increased after THA. Although the PA in the standing and supine positions plateaued 1 year after THA, the dPA gradually increased. In addition, the percentage of patients who showed a difference of more than 10° in dPA tended to increase yearly. In particular, elderly female patients who showed posterior tilt in PA in the standing or supine positions or a large dPA before THA tended to show a dPA of more than 10° after THA.
authors: Department of Orthopaedic Surgery, Yokohama City University Medical Center, Yokohama, Japan.
authors: Naoya
authors: N
authors: Taki
authors: Naoto
authors: N
authors: Mitsugi
authors: Yuichi
authors: Y
authors: Mochida
authors: Yasushi
authors: Y
authors: Akamatsu
authors: Tomoyuki
authors: T
authors: Saito
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation; D005260:Female; D005500:Follow-Up Studies; D006621:Hip Joint / Q000000981:diagnostic imaging* / Q000601:surgery; D006622:Hip Prosthesis; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D008875:Middle Aged; D015207:Osteoarthritis, Hip / Q000601:surgery; D010384:Pelvic Bones / Q000000981:diagnostic imaging*; D011187:Posture; D011859:Radiography; D012189:Retrospective Studies; D012737:Sex Factors; D016683:Supine Position