1998～2002年陕西省两个改水降氟村地氟病调查报告

为观察两监测点改水后水、尿氟含量变化，评估地氟病防治效果，连续4年用氟电极法测定水、尿氟含量，氟斑牙诊断用Dean's氏法，结果表明巴邑村水氟含量从2．5mg／L降至1．0mg／L(国家标准)以下，氟斑牙患病率从71．01％降至15.98％；吴坡村水氟含量从4．4mg／L降至1．12mg／L，氟斑牙患病率从81．3％降至39．77％，随水氟含量逐年下降，两监测点8～12岁儿童尿氟含量也逐年呈明显下降趋势；尿氟含量与氟斑牙患病之间，巴邑未出现明显的正相关关系(r=0．201)，吴坡呈非常显的正相关关系(r=0．876)，说明改水降氟对地氟病的防治效果是明显的，值得推广。

Investigation Report on Endemic Fluorosis After Water Quality Improvement at Villages in Shaanxi Province from 1998 ～ 2002

In order to investigate the change of water and urinary fluoride content after water quality im-provement in two fluorosis areas, and demontrate the effect of prevention and cure on endemic fluorosis, the fluoride in water and urine was determined by using fluoride selective electrode and the dental fluorosis was di-agnosed by Dean' s. We observed at the two villages for 4 years continuously, and found out that in Bayi vil-lage, fluoride concentration dropped from 2. 5mg/L to less than 1.0mg/L, and the incidence rate of dental fluorosis dropped from 71.01% to 15. 98% , and at Wupo village fluoride in drinking water dropped from 4.4 mg/L to 1.12mg/L, the incidence rate was 39. 77% now, other than the original 81. 3% . The urinary fluoride content in children aged 8 - 12 decreased gradually year by year along with reducing of the water fluoride. There was a remarkable correlative relationship between urinary content and the incidence rate of dental fluorosis in Wupo, whereas there was no correlation between them in Bayi. It is concluded by the study that the pre-ventive effect of water quality improvement is notable, and worthwhile popularizing.