Stress-shielding effect continues to be one of the major factors that cause failure in cementless total hip replacement. Therefore, the goal of this study is to use finite element method to investigate the stress- shielding effects of different porous-coating extents on a maximum-canal- fill custom prosthesis. Four different extents of porous coming (un-coated, 1/3 coated, 2/3 coated, fully-coated) with the assumption of fully bone ingrowth to the porous-coated areas were considered. The stress distributions for the four implanted models and the intact femur model were compared and the stress-shielding effects were evaluated. Results showed that for the less coated prosthesis, less stress-shielding effect in the proximal femur. For the fully coated prosthesis, less stress concentration in the distal region near the tip of the prosthesis was found.
|Number of pages||8|
|Journal||Chinese Journal of Medical and Biological Engineering|
|Publication status||Published - 1998 Jan 1|
All Science Journal Classification (ASJC) codes