人工关节材料摩擦性能研究进展

Research progress on tribological properties of artificial joint materials

  • 摘要: 人工关节在使用过程中产生的大量磨屑进入关节周围组织中, 促使骨溶解和假体松动, 是限制假体使用寿命, 致使病人痛苦的主要原因。因此降低骨溶解和假体松动发生概率对提高人工关节寿命, 减轻病人痛苦具有十分重大的意义。磨损是关节材料失效的主要原因, 进一步防止磨损的发生需要提高关节材料摩擦磨损性能。因此众多研究者在此领域针对人造关节材料表面摩擦性能进行了大量的研究。我们针对提高人工关节材料的摩擦性能的研究成果进行了总结, 分类介绍了各种人工关节材料及其性能优缺点, 并围绕材料本身或经过改进技术后的人工关节材料的摩擦磨损性能展开综述。近年来通过对各种关节材质表面进行改性成为了研究热点, 比如TiAlN涂层作用在钛合金表面后能使钛合金磨损率能降低80 %, 激光处理能让PEEK磨损率降低90 %。另外新型的材料也不断问世, 例如继超高分子聚乙烯后性能优异的新型高密度聚乙烯材料ULWPE。同时, 作为减磨耐磨且具有优异的生物相容性的碳类材料也引起了研究者的注意, 逐渐成为焦点。在此综述近几年关节材料摩擦性能发展成果, 为未来研究提供方向, 最后也提出了对人工关节发展的展望。

     

    Abstract: Practice has found that the main reason for limiting the service life of the prosthesis and causing the patient's pain is that a large amount of wear debris generated during the use of the artificial joint enters the tissues around the joint, which promotes osteolysis and loosening of the prosthesis. Therefore, reducing the probability of osteolysis and prosthesis loosening is of great significance to increase the life of artificial joints and alleviate patient suffering. Wear is the main reason for the failure of joint materials. In order to prevent the occurrence of wear, it is necessary to improve the friction and wear performance of joint materials. Therefore, many researchers have conducted a large number of tests and improvement studies on the friction properties of artificial joint materials. We summarize the research results of improving the friction performance of artificial joint materials in recent years, introduces various artificial joint materials and their performance advantages and disadvantages, and summarizes the friction and wear performance of the materials themselves or materials after improved technology. In recent years, the research on surface modification of various joint materials has become a hot spot. For example, TiAlN coating can reduce the wear rate of titanium alloy by 80 % after acting on the surface of titanium alloy, and laser treatment can reduce the wear rate of PEEK by 90 %. In addition, new materials are also coming out, such as ULWPE, a new high-density polyethylene material with excellent performance after ultra-high molecular polyethylene. At the same time, as a carbon material with excellent biocompatibility and friction reduction, it has also attracted the attention of researchers and has gradually become the focus. At there review the development results of the friction properties of joint materials in recent years and provide directions for future research. Finally, it also puts forward the prospects for the development of artificial joints.

     

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