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氟是地壳中广泛分布的元素之一,其克拉克值为770ppm,主要赋存在萤石、冰晶石和氟磷灰石等矿物中。在人体内,微量的氟对硬组织的正常矿物化是必须的,对抵抗和治疗龋齿的作用也为很多研究者所承认。然而,过量地吸入氟则会产生氟斑牙和氟骨症等氟中毒。地方性氟中毒广见于世界一些水及土壤中含氟量过高的地区,主要是饮用高氟水引起的。由于人性内96%的
Fluorine is one of the widely distributed elements in the crust, with a Clarke value of 770 ppm, mainly found in minerals such as fluorite, cryolite and fluorapatite. Trace amounts of fluoride are necessary for the normal mineralization of hard tissues in the body, and are recognized by many investigators for their ability to resist and treat dental caries. However, excessive fluoride inhalation can cause fluorosis such as dental fluorosis and skeletal fluorosis. Endemic fluorosis is widely seen in some areas of the world where the fluorine content in water and soil is too high, mainly caused by drinking high-fluoride water. Because of human nature within 96%