title: Understanding acetabular cup orientation: the importance of convention and defining the safe zone.
abstract: Understanding acetabular cup orientation is important in all aspects of total hip arthroplasty including preoperative planning, intraoperative positioning, and postoperative analysis. New concepts in ideal cup orientation such as 'combined anteversion' have emerged. Using computer navigation and three-dimensional imaging, the potential for accuracy and precision of implantation have improved. Nevertheless, the varying manner in which the terms "anteversion" and "abduction" are often used in the literature is indicative of a nebulous understanding of the complex spatial anatomy of acetabular cup orientation.
authors.affiliation: Department of Orthopaedics, The Ohio State University Medical Center, Columbus, Ohio 43210, USA. Vincent.Ng@osumc.edu
authors.forename: Vincent Y
authors.initials: VY
authors.lastname: Ng
authors.forename: Michael A
authors.initials: MA
authors.lastname: McShane
mesh_terms: D000077:Acetabulum / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D019644:Arthroplasty, Replacement, Hip / Q000295:instrumentation*; D006621:Hip Joint / Q000000981:diagnostic imaging / Q000601:surgery; D006622:Hip Prosthesis; D006801:Humans; D007593:Joint Instability / Q000517:prevention & control; D011475:Prosthesis Failure; D019919:Prosthesis Implantation / Q000379:methods; D011859:Radiography