氟斑牙是一种常见的影响牙齿外观的病象,其表现为弥漫性、对称性的牙釉质浑浊,有时牙齿还会呈黄色或棕色并形成凹陷。本世纪30年代,美国公共卫生署开展调查,查清地方性氟斑牙病区的分布及其与当地供水氟浓度的关系。与此同时,调查所得的资料表明饮水中的氟也可能与较低的龋齿率有关,特别是儿童期的龋齿率。仅经过五 Dental fluorosis is a common disease that affects the appearance of the teeth. It manifests itself in a diffuse, symmetrical enamel that is turbid, sometimes with yellow or brown teeth and dented teeth. In the thirties of this century, the United States Department of Public Health conducted a survey to find out the distribution of endemic dental fluorosis and its relationship with the fluorine concentration of local water supply. In the meantime, the data obtained from the survey indicate that fluoride in drinking water may also be associated with lower dental caries rates, especially in childhood. Only after five