title: Clinico-pathological aspects of a residual natal tooth: a case report.
abstract: A Japanese girl was referred to Osaka University Dental Hospital for examination of a tooth-like structure that had erupted following spontaneous exfoliation of a natal tooth in the lower left primary central incisor region. The structure had erupted at 6 months of age, and radiographic and clinical examination showed composition of pulp and dentin, but no enamel. On histological examination, the majority of the dentin area had a tubular dentin-like appearance, while the outer area of the root appeared to be composed of an osteodentin-like substance. Most of the dentin was covered by cementum. These findings suggest that the structure had originated from a developing remnant of the extracted natal tooth, which must have remained in the gingival tissues. We termed this calcified structure a residual natal tooth.
authors.affiliation: Department of Pedodontics, Osaka University Graduate School of Dentistry, Osaka, Japan.
authors.forename: Hanako
authors.initials: H
authors.lastname: Tsubone
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Onishi
authors.forename: Tetsuyuki
authors.initials: T
authors.lastname: Hayashibara
authors.forename: Shizuo
authors.initials: S
authors.lastname: Sobue
authors.forename: Takashi
authors.initials: T
authors.lastname: Ooshima
mesh_terms: D000848:Anodontia / Q000473:pathology; D002675:Child, Preschool; D003739:Dental Cementum / Q000473:pathology; D003782:Dental Pulp / Q000473:pathology; D003804:Dentin / Q000473:pathology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007180:Incisor / Q000002:abnormalities; D007223:Infant; D009306:Natal Teeth / Q000473:pathology*; D014094:Tooth, Deciduous / Q000002:abnormalities; D014097:Tooth, Unerupted / Q000473:pathology*