title: Ectopic eruption of maxillary first permanent molars in different areas of the United States.
mesh_terms: D002648:Child; D002675:Child, Preschool; D005260:Female; D005457:Fluoridation; D006801:Humans; D008297:Male; D008963:Molar / Q000503:physiopathology*; D011859:Radiography; D014079:Tooth Eruption, Ectopic / Q000000981:diagnostic imaging / Q000453:epidemiology*; D014481:United States