Objective In order to observe the changes of mineral elements and collagen metabolism products of patients with endemic fluorosis and combined fluoride-arsenic poisoning.

目的观察改水后地方性氟中毒、氟砷联合中毒患者无机元素和胶原代谢的改变。

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Of the patients suffering from arsenic-fluoride poisoning, the incidence of dental caries and periodontal is higher while the morbidity of mottled enamel is lower.

砷氟联合中毒患者中龋齿和牙周病的患病率较高，而氟牙症的患病率较低。

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Of the patients suffering from arsenic-fluoride poisoning, the incidence of dental caries and periodontal is higher while the morbidity of mot...

砷氟联合中毒患者中龋齿和牙周病的患病率较高，而氟牙症的患病率较低。

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