观察对象为北京市学龄前儿童68名(实验组对照组各34名),龋齿面为228面,观察期限22个月,涂药于乳前牙唇面龋与邻面龋均获得满意的效果,抑龋率高(均在84%以上),涂药后见龋蚀面黑亮且探之坚硬;

• The observation period lasted 22 months. The application of ASF at the decayed labial and proximal surfaces of the deciduous teeth showed satisfactory results and indicated high caries reduction rate (above 84%25). The decayed surface became,black,hard and shining.