Wear Behaviour of Polyethylene Socket on Retrieved Total Hip Prosthesis:Part 3 : Effects related to Material Properties

概要

論文の詳細を見る
We investigated retrieved polyethylene sockets of artificial hip joints to observe changes, if any, of material properties which may have occurred during implantation. We also investigated the sockets to estimate influences, if any, of fusion defects on wear performance. No influence of implantation on mechanical properties was found, except for one socket in which there were extraordinary defects. Fusion defects which were extremely large in diameter resulted in diminishment of tensile strength, yield strength and elongation at break. The higher the tensile strength, the lower the volumetric wear rate. The fewer the number of fusion defects, the higher the yield strength. When the thickness of the polyethylene sockets was greater than 9mm, the effect of the number of fusion defects on mechanical strength decreased. Consequently, the number of fusion defects did not affect the wear rate.
日本関節病学会の論文