作者用Dean氏的地区氟中毒指数试图对印度地方性氟中毒地区和非中毒地区进行评价。美国生活在温带地区的人恒齿发生色斑的最低值大大低于1.0ppm。虽然水中氧化物含量同着色程度一致,但这种关系并非一致。因为水的消耗量以及由此而摄取氟的量起一定的作用。年平均气温越高,消耗的水越多,由此而摄取的氟也就多。在印度 The authors use Dean’s area fluorosis index to attempt to evaluate areas of endemic fluorosis and non-poisoned areas in India. In the United States, people living in temperate regions, the lowest value of the permanent teeth stains was significantly lower than 1.0ppm. Although the water oxide content consistent with the degree of coloring, but the relationship is not the same. Because of the amount of water consumed and hence the amount of fluorine taken up, it plays a role. The higher the annual average temperature, the more water it consumes, and the more fluoride it ingests. in India