Static shear strength between polished stem and seven commercial acrylic bone cements.
The stem-cement interface is one of the most significant sites in cemented total hip replacement and has long been implicated in failure of the whole joint system. However, shear strength at this interface has rarely been compared across a range of commercially available bone cements. The present study seeks to address this issue by carrying out a comparative study. The results indicated that the static shear strength was more dependent on cement type than cement viscosity and volume. However, both cement type and viscosity were contributory factors on porosity and micropore size in the cement surface. There was no significant difference between Simplex P and Simplex P with Tobramycin. Although the bone cements were all hand mixed in this study, the static shear strength was significantly larger than the values recorded by other researchers, and the porosity and micropore size showed much lower values. Bone cement transfer films were detected on the stem surface, typically about 4-10 mum thick. They were considered to be an important factor contributing to high friction at the stem-cement interface after initial debonding.
Zhang
Hongyu
H
Centre for Precision Technologies, School of Computing and Engineering, University of Huddersfield, Queensgate, Huddersfield, UK. H.Zhang@hud.ac.uk
Brown
Leigh
L
Blunt
Liam
L
D001672:Biocompatible Materials; D001843:Bone Cements / Q000737:chemistry*; D006622:Hip Prosthesis; D019904:Polymethyl Methacrylate / Q000737:chemistry; D033081:Shear Strength; D013193:Stainless Steel
D001672:Biocompatible Materials; D001843:Bone Cements; D013193:Stainless Steel; D019904:Polymethyl Methacrylate