title: [Survey on children's dental fluorosis and fluoride content in urine after defluridation to improve drinking water].
abstract: The authors surveyed the dental fluorosis and fluoride content in urine of 8-12 years old children's in 1993 to 1999 for the evaluation of the efficiency to prevent endemic fluorosis after defluoridation to change drinking water source in Guangdong Province. Three villages: slight fluorosis area in Dazhai village, middle fluorosis area in Hupi village and severe fluorosis area in Anquan village in Fengshun County were surveyed. The results showed that the fluoride contents in drinking water were 1 mg/L (or less) in Anquan village, at the same time the prevalence of dental fluorosis and indexes of dental fluorosis were decreasing as changing water time. Fluoride contents in urine were normal. But in other two villages, the fluoride contents in drinking water exceeded 1 mg/L, therefore the children's prevalence rates and indexes of dental fluorosis were higher than the national standards. It is important to keep fluoride contents in drinking water under 1 mg/L for preventing endemic fluorosis by defluoridation to improve drinking water.
authors.forename: J
authors.initials: J
authors.lastname: Wu
authors.forename: J
authors.initials: J
authors.lastname: Zhang
authors.forename: Z
authors.initials: Z
authors.lastname: Chen
authors.forename: G
authors.initials: G
authors.lastname: Du
mesh_terms: D002648:Child; D002681:China / Q000453:epidemiology; D005260:Female; D005457:Fluoridation / Q000009:adverse effects*; D005459:Fluorides / Q000009:adverse effects* / Q000652:urine; D009050:Fluorosis, Dental / Q000453:epidemiology* / Q000652:urine; D006801:Humans; D015994:Incidence; D008297:Male; D012423:Rural Health; D014881:Water Supply / Q000592:standards*
chemical_list: D005459:Fluorides