The fluoridation of water supplies.
D003731:Dental Caries / Q000517:prevention & control; D005457:Fluoridation / Q000295:instrumentation / Q000379:methods*; D006801:Humans; D006858:Hydrofluoric Acid; D012824:Silicic Acid; D012969:Sodium Fluoride; D006113:United Kingdom
D012824:Silicic Acid; D012969:Sodium Fluoride; D006858:Hydrofluoric Acid