Wear Properties of Surface Modified Ultra-high Molecular Weight Polyethylene.
- Author:
Kyung Tae KIM
1
;
Jae Bong CHOI
;
Kui Won CHOI
Author Information
1. Biomedical Research Center, Korea Institute of Science and Technology, Korea.
- Publication Type:Original Article
- Keywords:
UHMWPE;
Artificial joint prosthesis;
Wear;
Osteolysis;
Wettability;
Ion-implantation technique
- MeSH:
Arthroplasty;
Hardness;
Joints;
Lubrication;
Molecular Weight*;
Osteolysis;
Polyethylene*;
Transplants;
Wettability
- From:Journal of Korean Orthopaedic Research Society
1998;1(2):167-173
- CountryRepublic of Korea
- Language:Korean
-
Abstract:
The wear debris of ultra-high molecular weight polyethylene (UHMWPE) used as a bearing material in total joint arthroplasty evokes a serious adverse biological reaction (osteolysis). In this study, therefore, the wear resistance of UHMWPE is enhanced by attaching a hydrophilic graft on the UHMWPE surface and by improving surface hardness without deteriorating the mechanical properties, which may result in the formation of lubrication film and the increased resistance to penetration, scratching or deformation during articulation. This was done by ion-implantation technique. The results showed that the wettability and the surface hardness of the modified UHMWPE by the above treatments increased due to the increased cross-linking density and hydrophilic graft attachment on the surface. The wear test was performed by a wear testing machine of pin-on-disk type. The modified UHMWPE revealed about 30~50% less volumetric wear than the control specimen. It was also shown that the volumetric wear depended not only on the optimal treatment condition but on the applied load and the sliding speed.
