本文通过对三组乳牙氟水平的测定及其对试管内人工龋实验敏感性的比较,分析了釉质表面氟水平与氟源的关系以及与酸蚀深度的关系,从而进一步探讨氟化物的防龋机理。一、材料及方法三组无龋乳尖牙来自:(1)1960年以前出生的布里斯托尔(Bristol)儿童;(2)1975年以后出生的布里斯托尔儿童;(3)1975年以后出生的伯明翰(Bir- In this paper, the determination of fluoride levels in three groups of deciduous teeth and the comparison of their sensitivity to in-vitro artificial caries experiments were conducted to analyze the relationship between fluorine level on the surface of enamel and fluorine source and its relationship with the depth of etching, mechanism. MATERIALS AND METHODS Three groups of caries-free canine were derived from: (1) Bristol children born before 1960; (2) Bristol children born after 1975; (3) 1975 After the birth of Birmingham (Bir-