Water fluoridation in 40 Brazilian cities: 7 year analysis

摘要: Objectives Fluoride levels in the public water supplies of 40 Brazilian cities were analyzed and classified on basis risk/benefit balance. Material Methods Samples collected monthly over a seven-year period from three sites for each supply source. The samples duplicate laboratory Center Research Public Health - UNESP using an ion analyzer coupled to fluoride-specific electrode. Results A total 19,533 analyzed, which 18,847 artificially fluoridated 686 not fluoridated. In performing fluoridation, 51.57% (n=9,720) had fluoride range 0.55 0.84 mg F/L; 30.53% (n=5,754) below F/L 17.90% (n=3,373) above (maximum concentration=6.96 F/L). Most fluoridation that majority with recommended parameter deep wells more than one source supply. There was some variability same site between collection city. Conclusions within provides best combination risks benefits, minimizing risk dental fluorosis while preventing caries. conduction studies about distribution systems is suggested high natural concentrations order optimize use costs avoid fluorosis.