title: Metal-on-Metal Bearings in Total Hip Arthroplasty.
abstract: The demand for total hip arthroplasty is increasing, as are patients' expectations to return to high activity levels. Metal-on-metal bearings are being used in an effort to maximize the longevity of primary hip replacements. Acetabular component inclination has been a recognized aspect of surgical technique for more than 20 years; it now is considered critical, especially in hip resurfacing or implantation of a stem-type device with a larger diameter femoral head and a monoblock acetabular component. It is important to understand the indications for using metal-on-metal bearings as well as the key clinical factors for avoiding early implant failure.
authors.affiliation: Division of Orthopaedics, University of Ottawa, Ottawa, Ontario, Canada.
authors.forename: Paul E
authors.initials: PE
authors.lastname: Beaulé
authors.forename: Steven A
authors.initials: SA
authors.lastname: Mussett
authors.forename: John B
authors.initials: JB
authors.lastname: Medley
mesh_terms: D019644:Arthroplasty, Replacement, Hip; D019544:Equipment Failure Analysis; D006622:Hip Prosthesis / Q000009:adverse effects; D006801:Humans; D008422:Materials Testing; D008670:Metals / Q000009:adverse effects; D011474:Prosthesis Design / Q000009:adverse effects; D011475:Prosthesis Failure; D018570:Risk Assessment; D016474:Weight-Bearing / Q000502:physiology
chemical_list: D008670:Metals