The effect of fluoride in drinking water on the number of cavities in teeth of 15-year-old children.
D000293:Adolescent; D004245:DMF Index; D003731:Dental Caries / Q000453:epidemiology* / Q000517:prevention & control; D003793:Dental Restoration, Permanent; D004739:England; D005457:Fluoridation; D006801:Humans