类金刚石薄膜在人工关节摩擦副表面改性进展

类金刚石(DLC)薄膜由于其优异的减摩耐磨性以及良好的生物相容性被引入到人工关节材质中。该文综述了DLC薄膜在人工关节摩擦副表面改性的研究现状,包括DLC薄膜的分类、制备方法及内应力。介绍了提高DLC膜基结合力的方法及DLC薄膜生物相容性的研究进展。接着,对不同DLC薄膜人工关节摩擦副的研究成果进行了阐述。最后,针对DLC薄膜存在的问题提出了今后DLC薄膜人造关节的研究方向。

Diamond-like carbon film and its application on articular surface of artificial joints- Current Status

Diamond-like carbon (DLC) film, due to the excellent tribological properties and good biocompatibility, was used to improve the wear and corrosion resistance of artificial joints. This paper reviewed the research status of DLC films in the field of artificial joints, including the classification and deposition methods of DLC films. Although this coating material has been studied for decades, under the combined action of high-load friction and corrosion in the complex physiological and mechanical environment of the human body, high internal stress resulted in insufficient adhesion, which limited its application in the field of artificial joints. This paper introduced the method of reducing the internal stress of DLC film and improving the adhesion of film base and the biocompatibility of DLC film. Finally, the research progress of different DLC coated artificial joint friction pairs was described. According to this review, superior candidate material for articulating implants was a thick and adherent hydrogen-free DLC coating (high sp3%) on both sliding surfaces, which was essential for load-bearing implant applications. The problems of DL C film artificial joints need to be solved, which is conducive to improve the lifetime of DLC film.