Objective To detect mineral element levels in children with dental fluorosis and to study the relations between serum fluoride and mineral elements. Methods 80 children in Grade 5 were chosen from three coal - burning fluorosis areas and one non - fluorosis area in Xinhua County, Hunan Province. They were divided into six groups by the seriousness of the dental fluorosis: control group, doubtful group, very light group, light group, medium group and severe group. The content of fluoride, calcium, magnesium, copper, iron, zinc in serum was dete...