title: The prevalence of malocclusion and the need for orthodontic treatment in 9-year old Finnish schoolchildren.
mesh_terms: D002648:Child; D005387:Finland; D006801:Humans; D007574:Jaw Relation Record; D008310:Malocclusion / Q000145:classification / Q000453:epidemiology*; D009971:Orthodontics, Corrective