广东东部饮水氟适宜浓度的探讨广东东部饮水氟适宜浓度的探讨

目的：探索广东东部饮水氟适宜浓度。方法：在广东东部，对饮用0.1-2.5mg/L不同水氟浓度水的1237名9-17岁、35-44岁居民，进行龋病和氟牙症检查；并通过问卷调查，对可能接触氟的生活习惯进行研究；让受检者对氟牙症牙色进行自我评价。结果：水氟浓度是影响氟牙症发生的最主要因素，氟牙症随水氟浓度升高加重，而随水氟浓度升高，龋均则下降，当水氟浓度为0.57mg/L时，氟牙症指数为0.4，水氟浓度为0.7mg/L时，氟牙症指数为0.6。当地居民对氟牙症流行可接受程度与Dean所订标准相符。结论：广东东部饮水氟适宜浓度建议为0.57mg/L，最高允许浓度为0.7mg/L。

The Optimal Concentration of Drinking Water in Eastern Guangdong

OBJECTIVE: The objectives were to explore the optimal concentration of drinking water in Eastern Guangdong and to provide information for the health administrative department to set up the criteria for fluoride concentration. METHODS: Totally 1237 9-17 and 35-44 years old residents in Eastern Guangdong who drinking water containing 0.1-2.5 mg/L fluoride were recruited to investigate the occurrences of dental caries and dental fluorosis. Their background information and perceived appearances of teeth were also recorded. RESULTS: The major factor influencing dental fluorosis was fluoride concentration in drinking water. Dental caries decreased when the fluoride concentration increased but dental fluorosis also increased at the same time. It was showed by calculation that the Dental Fluorosis Index would be 0.4 and 0.6 when the fluoride concentration was 0.57 mg/L and 0.7 mg/L respectively. The acceptation to the severity of dental fluorosis among the study subjects was in accordance with the Dean's criteria. CONCLUSION: It suggests that the optimal fluoride concentration in Eastern Guangdong is 0.57 mg/L and should not exceed the upper limit of 0.7 mg/L.