江苏省丰县属地方性氟中毒病区，致病的主要原因是水氟含量过高，平均超标率为59．50％，学生氟斑牙患病率高达69．61％。为探讨不同饮水含氟量与学生氟班牙之间的关系，我们于1995年10月进行了此项研究，现将结果报告如下。1调巴方法1．l将饮水含氟量不同的病区分层后，每层防 Feng County of Jiangsu Province is an endemic fluorosis area. The main cause of the disease is the high fluoride content in the water. The average over-standard rate is 59.50%, and the prevalence of dental fluorosis in students is as high as 69.61%. In order to discuss the relationship between the fluoride content of different drinking water and the students’ fluoride, we conducted this study in October 1995 and report the results as follows. 1 tuna method l After different levels of drinking water containing different levels of fluoride, each layer of defense