title: [An experimental study on the wear of HDP socket in total hip arthroplasty--quantification of worn surface by SEM 3-D image analysis and effect of gamma-ray-irradiation of HDP on improving tolerance to wear].
abstract: In order to evaluate the usefulness of gamma-ray-irradiation to improve the tolerance to wear of the sockets, the worn surface of the 2.5 M rad gamma-ray-irradiated HDP sockets after total hip arthroplasty has been quantified by a newly-developed 3 dimensional (3-D) image analysis method in combination with scanning electron microscopy (SEM). The SEM 3-D image analysis revealed marked deformation, consisting of unevenness with about a 20-micron difference in height, of the worn surface of the ordinary HDP socket, while the same analysis revealed a smooth surface in the gamma-ray-irradiated HDP socket. The decrease in thickness of the gamma-ray-irradiated HDP socket was about 1/4 that of the ordinary HDP socket. These results indicate that SEM 3-D image analysis is capable of quantifying the morphology of the worn surface and that gamma-ray-irradiation improves the tolerance to wear of the socket, thus making its surface resistant to deformation.
authors.affiliation: Department of Orthopaedic Surgery, Jikei University, School of Medicine, Tokyo, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kanao
mesh_terms: D000818:Animals; D004285:Dogs; D005720:Gamma Rays; D006622:Hip Prosthesis; D007091:Image Processing, Computer-Assisted; D008855:Microscopy, Electron, Scanning; D011095:Polyethylenes / Q000528:radiation effects*; D013499:Surface Properties / Q000528:radiation effects*
chemical_list: D011095:Polyethylenes