碳增强的聚醚醚酮人工关节假体材料的磨损性能研究

目的 研制新型人工关节假体材料-碳纤维增强的聚醚醚酮(CFPEEK)，评价其生物磨损性能。方法 采用国产材料和工艺研制出CFPEEK复合材料，在模拟体液环境下对其本身以及与不同磨擦偶间的磨损性能进行测试，并与传统髋臼假体材料超高分子聚乙烯(UHMWPE)和传统金属人工关节材料的耐磨损性能进行比较。结果 1 CFPEEK的体积磨损率只为UHWMPE的1／2，耐磨损性能明显优于UHMWPE。CFPEEK与钴铬钼合金(CoCrMo)对磨将产生最少的磨屑。CFPEEK与CoCrMo对磨时的摩擦系数最低。2CFPEEK的体积磨损率分别为钛合金(Ti)和CoCrMo的1／50和1／20，前者与后两者相比，均具有非常显著性差异，磨损表面形态观察显示CFPEEK磨痕细小，基质纤维结合良好。结论 CFPEEK材料具耐磨损、生物相容性好的特点，是一种未来假体的理想材料。

CFPEEK Composite Materials For Hip Prosthesis: Fabrication, and Wear

Objective To develop two kinds of carbon fiber reinforced polyetheretherketon composite (CFPEEK) materials for hip prosthesis. Demonstrating their perfect wearing characteristics. Methods Domestic PEEK and advanced molding methods were used to develop two kinds of CFPEEK: chopped carbon fiber reinforced PEEK composite ( CFPEEKS ) and continuous carbon fiber reinforced PEEK composite ( CFPEEKC ).Their moduli of elasticity are 44.35 and 69.1Gpa respectively. Wearing characteristics of CFPEEKS were observed in wet conditions in according with the national standards. All the results were compared with traditional acetabular material UHMWPE and traditional metal prosthetic materials. The results were compared with. Results (1) The specific wear rate of CFPEEK was only 1/2 of the specific wear rate of UHMWPE. Meaning that the wear property of CFPEEK is better than that of UHMWPE (Alpha=0.01 level) .Wearied with cobalt-chromium-molybdenum alloy (CoCrMo) CFPEEK will produce the lest amount of debris (Alpha=0.01 level) and demonstrated the lowest friction coefficient. (2) The specific wear rate of CFPEEK was only 1/50 and 1/20 of the specific wear rate of titanium alloy (Ti) cobalt-chromium-molybdenum alloy (Co-Cr-Mo) respectively, The difference is significant ( Alpha=0.01 level) Conclusion The results of this experiment show that CFPEEKS have good biocompatibility, better wearing characteristics and lower moduli of elasticity. They are all promising biological composite materials.