为预防牙齿龋蚀有些地方正计划给儿童以氟水漱口、自来水加氟等,实际上有些地区(京都山科地区、宝塚市、涉川市等)业已实行。与此相反,也有报告说:因长期摄取氟致氟斑牙发病率上升。因此本次测定了群马县各地的天然水或生活用水的氟浓度,探讨与已报告的某县内氟斑牙多发地带的关系。 In order to prevent dental caries, children are flushed with fluoride water, and fluoride is added to water in some places. In fact, some areas (Kyoto Yamako district, Takarazuka City, Shinagawa City, etc.) have been practiced. In contrast, there is also a report that the incidence of dental fluorosis increased due to long-term fluoride exposure. Therefore, the fluorine concentration of natural or domestic water in Gunma Prefecture was measured to investigate the relationship with the reported frequency of dental fluorosis in a county.