口腔种植材料中纯钛和Ti_6Al_7Nb合金在人工唾液中的复合微动磨损行为研究  

The study of running and damage mechanisms of composite fretting of pure titanium and Ti_6Al_7Nb alloy in dental implantation

作　　者：赵慧[1] 张保荣[1] 王晓东[1] 董云士 

机构地区：[1]航空总医院,北京100012 [2]河南省新乡市第二人民医院,河南新乡453000

出　　处：《全科口腔医学电子杂志》2015年第2期3-10,共8页Electronic Journal of General Stomatology

摘　　要：目的研究口腔种植体材料纯钛(TA2)和Ti6Al7Nb在人工唾液环境中切向微动和切向与径向的复合微动。方法选用处理过的纯钛和Ti6Al7Nb合金在微动实验装置中测得最大载荷、最小载荷、加载速度、循环周次试验参数。结果 Ti6Al7Nb合金与纯钛TA2相比耐磨性更好。随着倾斜角度的增加和外加载荷的降低,磨损变的轻微。结论复合微动的的动力学行为和磨损程度依赖于外加载荷、倾斜角度、循环次数和材料特性。Objective To study pure titanium（TA2）,Ti6A17N-b, which are commonly used as dental implant materials, were selected as the counter-pair. The studies on the tangential fretting and composite fretting （radial and tangential） in the artificial saliva environment system are carried out systemically. Methods Select pure titanium（TA2）, Zi6A17Nb, which are Processed, to measure maximum load, minimum load, loading speed, cycle times test parameters in micro experimental device, Results The Ti6A17Nb presented better dual- motion fretting wear resistance than that of TA2 in artificial saliva under the same test parameters. And with the increase of inclined angle and decrease of imposed load, the wear extent became slighter accordingly. The wear mechanisms of pure titanium TA2 and Ti6A17Nb alloy under the condition of dual-motion fretting in artificial saliva were abrasive wear, oxidative wear and delamination. Conclusion The dual-motion fretting kinetic and wear behaviors of TA2 pure titanium and Ti6A17Nb alloy were strongly dependent upon the imposed load, inclined angle, the number of cycles and material properties. During the process of the dual-motion fretting, the fretting running mode gradually transformed from the dual-motion fretting to radial fretting, i.e. the tangential fretting component reduced and the radial fretting component increased.

关 键 词：摩擦磨损 复合微动 人工唾液 

分 类 号：R783[医药卫生—口腔医学]