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四川省万源市沙滩镇和石塘乡(原白沙工农区),位于万源市东南部,分别距城区33公里和40公里,以山为主,共辖16个村3个社区8 502户41 570人,幅员面积173平方公里。1998年8~12岁儿童氟斑牙患病率为63.89%,流行指数为1.85,属中等流行区。病区煤氟含量均值为1 676.76ppm,达到世界煤氟含量均值80.00ppm的21倍[1]。自2005年起,在中央财政的支持下在燃煤型氟中毒流行区实施以改灶降氟为主的综合防治措施,通过对病区万源市沙滩镇和
Shatan Town and Shitang Township (formerly Baisha Workers and Peasants Region), Wanyuan City, Sichuan Province, located in the southeast of Wanyuan City, 33 km and 40 km away from the urban area respectively, dominated by mountains and totally controlled 8 502 households in 3 communities in 16 villages 41 570 people, covering an area of 173 square kilometers. The prevalence of dental fluorosis in children aged 8 ~ 12 years was 63.89% in 1998 with a prevalence index of 1.85. Ward average coal fluorine content of 1 676.76ppm, the world average coal fluorine content of 80.00ppm 21 times [1]. Since 2005, with the support of the central finance, a comprehensive prevention and control measure based on the focus on fluoride reduction in stoves has been implemented in the endemic areas of coal-fired fluorosis.