Dental caries in Danish 7-, 11- and 13-year-old children in 1963, 1972 and 1981.
D000293:Adolescent; D002648:Child; D003430:Cross-Sectional Studies; D004245:DMF Index; D003718:Denmark; D003731:Dental Caries / Q000453:epidemiology*; D006801:Humans