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目的 了解掌握农村改灶降氟后地方性氟中毒病情动态 ,以便制定防治措施与对策。方法 按方案随机抽取常山县芳村镇芳村、洁湖村进行病情、外环境氟含量调查。结果 居民饮用水氟含量 (缸水 )为 (0 715± 0 6 97)mg/L ,高于源 (井 )水 (0 4 83± 0 2 0 6 )mg/L ,T =3 16 ,P <0 0 1。居民户室内空气氟含量 >0 0 2mg/m3 氟含量样品占 75 % ,其燃煤型户旺火期氟含量 (0 0 5 18± 0 0 374 )mg/m3 高于非燃煤型户 (0 0 136± 0 0 0 83)mg/m3 ,T =3 0 82 ,P <0 0 1。燃煤型户儿童尿氟含量 (0 6 38± 0 4 2 5 )mg/L高于非燃煤型户儿童 (0 30 4± 0 2 85 )mg/L ,T =2 895 ,P <0 0 1。 8～ 12岁儿童氟斑牙患病率为 7 4 3%。结论 当地地方性氟中毒病情已基本得到控制 ,儿童氟斑牙患病率与 1990年相比有明显下降 ,今后仍然需要加强氟中毒病情的防治监测。
Objective To understand the dynamic state of endemic fluorosis in rural areas after fluoride-lowering in order to formulate prevention measures and countermeasures. Methods According to the plan, Fangcun and Jiehu villages in Fangcun Town, Changshan County were randomly selected to investigate the fluoride content of the disease and external environment. Results The fluoride content of drinking water was (0 715 ± 0 6 97) mg / L, higher than that of source water (0 4 83 ± 0 2 0 6) mg / L, T 3 16, P <0 0 1. The fluorine content of indoor air of households> 0 0 2mg / m3 was 75%, and the fluorine content (0 0 5 18 ± 0 0 374) mg / m3 of coal-fired households was higher than that of non-coal-fired households 0 0 136 ± 0 0 0 83) mg / m3, T = 3 0 82, P <0 0 1. Urine content in children with coal-fired households was higher than that in non-coal-fired households (0 36 ± 0 425 mg / L, 0 8 38 ± 0 425 mg / L, T 0 2855, P 0 0 1. The prevalence of dental fluorosis in children aged 8 ~ 12 was 74.3%. Conclusion The prevalence of endemic fluorosis has been basically controlled. The prevalence of dental fluorosis in children has dropped significantly compared with that in 1990, and the prevention and treatment of fluorosis should still be strengthened in the future.