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作者对陕西省定边县地方性氟中毒进行了流行病学调查。结果表明，平原区氟斑牙患病率达88．19％。临床症状和体征的检出率为2O．84％，女性高于男性。病区83．66％的水源氟含量超过1．0mg／L，氟斑牙患病率和症状、体征的检出率与水氟含量及年龄增长相一致，尿氟与水氟呈正相关，粮食和空气不是主要摄氟介质。氟骨症患者血清碱性磷酸酶活性增高，血清钙含量降低，磷含量升高。地下水氟含量与地貌等因素有关。
The authors conducted an epidemiological investigation of endemic fluorosis in Dingbian County, Shaanxi Province. The results showed that the prevalence of dental fluorosis in plain area reached 88.19%. Clinical symptoms and signs of the detection rate of 2O. 84%, women than men. Wounds 83.66% of the water fluoride content of more than 1.0mg / L, the prevalence of dental fluorosis and symptoms, the detection rate of signs and water fluoride content and age are consistent, urine fluorine and water fluoride was positively correlated, food And the air is not the main fluorine medium. Patients with skeletal fluorosis increased serum alkaline phosphatase activity, serum calcium decreased, phosphorus content increased. Groundwater fluoride content and landform and other factors.