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在1983年地方病调查中,发现耒阳县氟斑牙率在30％以上的村有362个,占该县总村数的57.8％。为弄清病区的氟源,我们于1984年9月至1985年3月对该县进行了抽样调查,结果报告如下。
In the 1983 endemic disease survey, 362 villages were found in which the rate of dental fluorosis was above 30% in Shenyang and 57.8% of the total number of villages in the county. To clarify the source of fluoride in the ward, we conducted a sample survey of the county from September 1984 to March 1985 and the results are reported below.