浙江省地方性氟中毒改水降氟防治效果评价

Evaluation of effect of fluorosis prevention by lowering fluoride in drinking water in Zhejiang province

目的了解浙江省地方性氟中毒防治措施落实情况及防治效果。方法32个病区县（市、区）中。随机选取15个县对8～12岁儿童氟斑牙患病及原病区村改水设施运行情况进行调查。水氟含量检测使用氟离子选择电极法；儿童氟斑牙检查使用Dean氏法。结果正常和间歇使用的改水工程为156个。受益人口数达385524人。管网末梢水氟含量均值为0．46mg／L，范围为0．09～4．51mg／L。受检人数29220人，氟斑牙患病率为7．70％，氟斑牙指数为0．15，判定流行强度为阴性。结论浙江省地氟病防治取得较好的效果，但存在着改水设施使用维护不善、非病区村患病率升高等新问题。

Objective To investiagte the condition of preventive measures and the control effects for endemic fluorosis in Zhejiang province. Methods 15 of 32 towns threatened by endemic fluomsis were selected randomly to investigate the management and usage of the drinking water defluoridation facilities, and to inspect the dental flourosis incidence of children aged 8 to 12 years. The children＇s mottled teeth were examined with Dean Index. The fluorides content in water was determined with FSLE method, Results 385 524 people were profited form 156 drinking water defluoridation hcilities used normally or intermittently. The average value of fluorides content in water of end pipe network Was 0.46 mg/L（ maximum, 4.51 mg/L; minimum, 0.09 mg/L）. The incidence of children suffering from mottled teeth was 7.70%, and dental fluorosis index was 0.15,which indicated negative prevalence. Conclusion The status of endemic fluorosis in Zhejiang province is improved gradually, but some problems are still existed.