Modular Ceramic Bearings on a CFRP Total Hip Replacement Femoral Stem
A modular ceramic femoral head was selected for use as the bearing on a novel carbon fibre reinforced plastic (CFRP) total hip replacement femoral stem. Mechanical testing was required to validate this novel combination of materials for load bearing implant application. The Ceramic Head-CFRP Stem Taper interface was tested under axial fatigue loads according to BS/ISO 7206-5, followed by static loading to failure. The assembly survived the fatigue loads and exceeded the required FDA post-fatigue strength by 50%. In parallel, the test was simulated in a Finite Element Analysis study, resulting in recommendations for the adhesive bonding technique used to attach the modular head to the CFRP stem to further improve its strength.
Guy Daculsi and Pierre Layrolle
A. Dickinson et al., "Modular Ceramic Bearings on a CFRP Total Hip Replacement Femoral Stem", Key Engineering Materials, Vols. 361-363, pp. 799-802, 2008