THE PRIMARY STABILITY OF A CEMENTLESS HIP PROSTHESIS UNDER THE COMPRESSIVE LOADING

  • XiaoSu Hu
  • Florenve Labesse-Jied
  • Guillaume Demey
  • Tarik Ait Si Selmi
Keywords: primary stability, cementless hip prosthesis, finite element model

Abstract

The objective of this research is to better understand the problems of primary stability of cementless hip prosthesis. The present study is aimed to develop a finite element model of the coupled system "femur-cementless prosthesis" which represents the implant in its environment particularly under the compressive loading. Its primary stability is investigated by quantifying the migration of the femoral stem in the femur and by analyzing the stress and strains engendered. We have made experimentations on ten fresh human femurs. A good agreement is observed between the experiments and the prediction by our finite element model for the prosthetic head displacement.