【摘要】 在往复滑动摩擦磨损试验台上以钛合金为对磨材料,考察了不同染色程度四环素牙的摩擦学性能,并与正 常恒牙进行了比较。结果表明:轻度四环素牙的摩擦磨损行为接近正常恒牙,磨损以擦伤和轻微犁削为主;重度 四环素牙的摩擦系数变化波动较大,稳态值较高,磨斑表面呈现显著犁沟和剥落,摩擦学特性逊于正常恒牙。四 环素牙的耐磨性随其染色程度加深而降低。更多还原

【Abstract】 By using a reciprocating sliding wear test machine, wear behaviors of natural teeth at different tetracycline stained extent opposite to the titanium alloy are studied. The results show that friction and wear behaviors of lightly tetracycline stained teeth are similar to those of normal permanent teeth, and the worn surface is characterized by scratch and slight plough. However, significant plough and delamination are dominant for heavily tetracycline stained teeth accompanying with strong discontinuities in the evolution of coefficient of friction and rather high stable friction coefficient, whose tribological property is inferior to normal permanent teeth. It is suggested that the resistance against wear of natural teeth decreases with the increasing of tetracycline stained extent.更多还原