Hard-on-hard bearings for total hip replacement may require a modular acetabular inlay for which polyethylene is often used in a sandwich-type configuration. However, differences in the elastic modulus of the materials make fixation of this metal insert uncertain. The aim of this study is to report a case of bilateral separation of the metal insert from the polyethylene sandwich in a metal-on-metal bearings prosthesis.
C Department of Orthopaedics, Roger Salengro Hospital, Lille 2 University, Lille University Teaching Hospital Center, 59037 Lille cedex, France. j_girard_lille@yahoo.fr
