Wearing performance of artificial hip joint
- VernacularTitle:人工髋关节假体磨损性能的研究现状
- Author:
Jun LIU
- Publication Type:Journal Article
- From:
Chinese Journal of Tissue Engineering Research
2007;0(35):-
- CountryChina
- Language:Chinese
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Abstract:
Polyethylene has been used as materials for artificial hip or knee for more than 40 years. It has low friction factor,wear rate,good mechanical function and biocompatibility. However,polyethylene wearing particle-caused local interface osteolysis,resulting in aseptic loosening is the primary reason for artificial hip replacement failure. To improve friction performance of artificial hip joint,joint prosthesis assembly interface such as metal to metal and ceramics to ceramics has arouse more attention. Linear friction rate of metal to metal artificial hip is one percent of metal to ultrahigh molecular polyethylene,but metal to metal artificial hip joint has stress shielding effect and potential toxicity. Ceramics has good biocompatibility,low friction coefficient,and wear-resistance,but lined ceramics breakage affects long-term effect of ceramics to ceramics artificial hip joint. To improve material function,explore prosthesis surface modification,and know biological friction and lubrication mechanism are important issues in current studies.
