Objective
To investigate the origin of fluoride in the coal-combustion endemic fluorosis areas in Xinhua County of Hunan Province; and to explore the pathway entering into the body, in order to provide scientific data for making preventive measures in the regions.
Methods
Four primary schools (three fluorosis schools and one control school) were selected from Xinhua county of Hunan province. The prevalence of dental fluorosis of children aged 8-12 years in Grade 3~5 of every school...