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MINERVA ORTOPEDICA E TRAUMATOLOGICA
Rivista di Ortopedia e Traumatologia
Minerva Ortopedica e Traumatologica 2017 June;68(2):58-63
Copyright © 2017 EDIZIONI MINERVA MEDICA
What’s new with dual-mobility hip arthroplasties?
Philippe HERNIGOU ✉, Jacques PARIAT, Damien POTAGE, Arnaud DUBORY, Charles H. FLOUZAT LACHANIETTE
Hopital Henri Mondor, University of Paris, Paris, France
Initially designed by Gilles Bousquet in France with the idea of reducing the risk of dislocation after total hip arthroplasty (THA), dual-mobility sockets made their way to Europe, USA, South America and Asia about 15 years ago, adding another tool to the management of instability after THA. These systems use a mobile intermediate polyethylene liner in addition to a standard retentive femoral head. This creates a femoral head with an increased diameter and two main articulation surfaces: first, between the conventional femoral head and mobile liner and, second, between the outer side of the mobile liner and a metallic acetabular cup which is fixated in the acetabular bone. Another less regarded articulation surface is described between the mobile liner at the level of the retentive rim and the femoral neck.
KEY WORDS: Arthroplasty, replacement, hip - Hip dislocation - Orthopedics