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用死亡率的资料再次对美国35个城市癌症的发生和饮水加氟的关系进行了调查,20个城市供应加氟水,15个城市供应非加氟水,见表1。供水加氟对预防儿童龋齿是一种有效的方法,它保护了自然的牙列。在公共饮水中加1ppm 的氟化物能使所有的儿童都得到足够的氟,从而增进了牙齿的健康。供应加氟水首先在密执安州大急流城的实验室进行,开始于1945年。关于加氟的安
Data on death rates were used to investigate the incidence of cancer and fluoride in drinking water in 35 U.S. cities. Fluoride was supplied to 20 cities and non-fluoride water was supplied to 15 cities (Table 1). Water supply fluoride to prevent dental caries in children is an effective way to protect the natural dentition. Adding 1 ppm of fluoride to public drinking water can improve the health of your teeth by getting enough fluoride for all children. The supply of fluoridated water was first conducted in the laboratory of Grand Rapids, Michigan, beginning in 1945. On fluoride safety