【摘要】 将烟斑着色对称的离体牙一剖为二,随机分入实验组(浸各种袪色素化合物溶液)和对照组(浸蒸馏水),结果表明pH5.0～8.2植酸有满意的去烟斑色素作用,且对于釉质牙骨质的显微硬度无影响,扫描电镜研究了常用摩擦剂的晶体结构及其使用后牙表面的超微结构表明,圆的蜂窝状二氧化硅和角度较钝的六角形氫氧化铝的祛色素作用优于角度较锐的方菱形碳酸钙,对牙面损伤也小。化学作用或有效的机械作用都是祛除色素洁白牙齿的可行办法。更多还原

【Abstract】 To split an extracted symmetric tobacco stain tooth in half-and-half,and randomlyput the one half into experiment group(submerged in various chemical stain removalsolution)and the another half into control group(submerged in distlled water).Theselection indicates that pH 5.0～8.2 phytic acid has satisfied stain removal with no eff-ect on micro-hardness of enamal and cementum.It is confidently recommended for oralhygienic products.Under scanning electron microscope,crystal structure of commonabrasives and configuration of dental surface after abrasion turn out the round honeyco-mb-like silicon dioxide and the obtuse haxagon aluminum hydroxide obtain more effec-five stain removal and less harsh on a tooth surface than the acute rhombus calciumcarbonate.It is an effective way to remove stain and keep the teeth white and sparkingwith chemical action and effective mechanical action.更多还原