Fluoridation of domestic salt after three years.
D002327:Cariostatic Agents; D002648:Child; D002675:Child, Preschool; D004245:DMF Index; D003731:Dental Caries / Q000517:prevention & control*; D003817:Dentition; D005457:Fluoridation; D005459:Fluorides / Q000627:therapeutic use*; D005503:Food Additives; D006801:Humans; D012965:Sodium Chloride / Q000627:therapeutic use*; D014094:Tooth, Deciduous
D002327:Cariostatic Agents; D005503:Food Additives; D012965:Sodium Chloride; D005459:Fluorides