ABSTRACT
Despite generally inferior clinical results with metal-on-metal total hip replacements, many metal-on-metal implants lasted over two decades or are still functioning in patients who received the implant at a young age (1,2). Acetabular component wear and loosening limit the survival of Charnley hips (3-7). Because of this, long-term survival rates of the Charnley hip and the McKee-Farrar are similar (8). Consequently, there is renewed interest in metal-on-metal bearings.
