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为了了解不同环境条件下龋齿及氟牙症的流行病学情况，对萍乡市二个乡村（长平乡和张佳坊乡）的１３～１５岁（平均年龄１３．９岁）中学生３８９人进行了口腔检查，问卷检查和被调查者的家庭饮水氟浓度测定。结果发现长平乡儿童由于９９．５％家庭用煤作燃料，龋患率仅５．５６％，氟牙症率达２５．２５％，而张家坊乡只有４１．４％家庭用煤，该乡儿童龋患率为１６．７５％，氟牙症率为０．５２％，二乡比较有明显差异，二乡家庭饮水含氟浓度没有差异。结果说明燃煤引起的空气氟污染是二乡儿童该二病发生率发生差异的主要原因。
To understand the epidemiology of dental caries and dental fluorosis in different environmental conditions, 389 middle school students aged 13 to 15 (mean age 13.9 years) from two villages in Pingxiang (Changping and Zhangjiafang Township) Examination, questionnaire examination and respondents' household drinking water fluoride concentration determination. As a result, 99.5% of domestic coal was used as fuel in Changping township. The caries prevalence rate was only 5.56%, that of dental fluorosis was 25.25%, and that of Zhangjiafang township was only 41.4% Caries prevalence was 16.75%, dental fluorosis rate was 0.52%, two townships were significantly different, two rural drinking water fluoride concentrations did not differ. The result shows that the fluorine pollution of air caused by coal combustion is the main reason for the difference in the incidence of these two diseases in Erxiang.