Diastema--a cause for concern.
D000293:Adolescent; D002648:Child; D003817:Dentition; D003970:Diastema; D006801:Humans; D007742:Labial Frenum / Q000601:surgery; D008310:Malocclusion / Q000209:etiology / Q000628:therapy; D009967:Orthodontic Appliances