Varied Ecological Environment and Fluorosis in Tibetan Children in the Nature Reserve of Mount Qomolangma

摘要

To determine the extent of brick tea consumption fluorosis in children living at elevations of 2000 and 4300 m, 519 children aged 8-15 years living in Xiege'er Town at 4300 m and Zhangmu Town at 2000 m were examined for dental fluorosis, Their urinary fluoride concentration was determined, their dietary Structure investigated, and the fluoride concentrations of various Foods, freshwaters, soils, and fuels determined. Fifteen Tibetan Families living in these two areas of the nature reserve of Mount Qomolangma were studied according to UNEP, FAO, and WHO guidelines for the study of dietary intake of chemical Contaminants, Horowitz's classification and examination of den- Tal fluorosis, and Dean's dental fluorosis index.