内黄县改水降氟防制地方性氟中毒效果评价

目的评价内黄县改水降氟对饮水型地方性氟中毒的防制效果。方法在内黄县饮水型地氟病病区选择改水组和未改水组,用氟离子选择电极法分别进行水氟及8～12岁儿童尿氟含量测定,用Dean氏分度法调查儿童氟斑牙患病情况。结果病区改水组水氟均值0.14mg/L,8～12岁儿童尿氟均值0.62mg/L,氟斑牙患病率13.51%,与未改水组水氟均值1.22mg/L、8～12岁儿童尿氟均值1.49mg/L、氟斑牙患病率43.68%比较差异均有统计学意义(P<0.01)。结论改水降氟达标能够降低该地区居民机体氟负荷,有效控制饮水型地方性氟中毒的流行。

Assessment of preventive effect of endemic fluorosis by alterring water sources to lower fluoride in drinking water in Neihuang

Objective To assess the preventive effect of endemic fluorosis by alterring water source to lower fluoride in drinking water in Neihuang.Methods Two groups were selected in Neihuang:non-defluoride group and defluoride group.In both groups,fluoride concentration in drinking water and8-12years old children's urine were determined by ion-selective electrode method,dental fluorosis were examined by Dean'smethod.Results Fluoride concentration in drinking water and8-12years old children's urine,and the incedence of dental fluorosis in8-12years old children in defluoride group were0.14mg /L,0.64mg /L,and13.51%,which were distinctly lower than those of the non -defluoride(P<0.01).Conclusion Water -induced fluorosis in Neihuang can be controlled effectively by alterring water sources to lower fluoride to a certain level.