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采用往复滑动摩擦磨损试验台,以TC4钛合金球为摩擦偶件,考察了人牙釉质在pH为3.2的柠檬酸介质中的摩擦磨损行为,并与人工唾液介质中的结果进行对比.结果表明:牙釉质在不同介质中的摩擦磨损行为存在显著差异.在柠檬酸介质中,鉴于柠檬酸对牙釉质表面的酸蚀软化和脱矿作用,牙釉质的摩擦系数低于人工唾液介质,但伴随显著波动,磨损机制以黏着剥落为主,磨损体积随循环次数增加几乎呈线性增长,磨损量明显大于人工唾液介质.
The friction and wear behavior of human enamel in citric acid medium with pH 3.2 was investigated by using reciprocating sliding friction and wear test bench with TC4 titanium alloy ball as the friction coupling element and compared with the result in artificial saliva medium : There is a significant difference in the friction and wear behavior of enamel in different media.In the citric acid medium, the frictional coefficient of enamel is lower than that of artificial saliva medium in view of acid etching softening and demineralization of the enamel surface by citric acid, but with Significant fluctuations in the wear mechanism stick to the main, wear volume increases almost linear with the increase in the number of cycles, the wear was significantly greater than the artificial saliva medium.