title: Simultaneous presence of a congenitally missing premolar and supernumerary incisor in the same jaw: report of case.
abstract: Supernumerary teeth and hypodontia can be regarded as opposite developmental phenomena. An eight-year-old girl presented a concomitant occurrence of a supernumerary tooth and two congenitally missing teeth. The supernumerary tooth was found in the left maxillary incisor region, while the left second premolar in the maxilla and the left lateral incisor in the mandible were congenitally missing. The supernumerary tooth showed a similar color and morphology to those of the maxilla lateral incisor, and the lateral incisor on the mesial side was diagnosed as a supernumerary tooth from dental age, eruption time, and mesiodistal crown dimension. The supernumerary incisor was guided labially to cure an anterior cross-bite, and the lateral incisor, canine, and first premolar were guided distally to compensate for the space left by the congenitally missing left second premolar.
authors.affiliation: Department of Pedodontics, Osaka University Faculty of Dentistry, 1-8 Yamadaoka, Suita, Osaka 565-0871, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Matsumoto
authors.forename: Y
authors.initials: Y
authors.lastname: Nakagawa
authors.forename: S
authors.initials: S
authors.lastname: Sobue
authors.forename: T
authors.initials: T
authors.lastname: Ooshima
mesh_terms: D000366:Age Determination by Teeth; D000848:Anodontia / Q000000981:diagnostic imaging*; D001641:Bicuspid / Q000002:abnormalities* / Q000000981:diagnostic imaging; D002648:Child; D005260:Female; D006801:Humans; D007180:Incisor / Q000002:abnormalities* / Q000000981:diagnostic imaging / Q000473:pathology; D008310:Malocclusion / Q000628:therapy; D008334:Mandible / Q000000981:diagnostic imaging; D008437:Maxilla / Q000000981:diagnostic imaging; D009811:Odontometry; D019228:Tooth Crown / Q000473:pathology; D014078:Tooth Eruption; D014096:Tooth, Supernumerary / Q000000981:diagnostic imaging*