Ameloblastic Fibro-odontoma; Report of a Case and Review of the Literature.

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W e report a case of ameloblastic fibro-odontoma and the literaturein Japan is also reviewed.<BR>An 8-year-old boy was referred to us because of delayed eruption of the right mandibular first molar. On the roentgenogram, radiopaque masses surrounded by radiolucency were recognized at the distal root apex of the right mandibular second deciduous molar. Its clinical diagnosis was odontoma, and the lesion was extirpated under local anesthesia. Radiopaque masses were recognized as tooth-like calcified bodies. Histopathology showed the proliferation of both fibrous tissue andameloblast-like epithelial cells, which resembled dental papillae and enamel organ. Pathological diagnosis was ameloblastic fibro-odontoma.<BR>19 cases (including our own case) were used for clinical evaluation. More than half of the patients were under ten years old. 11 patients were male and 8 were female. The tumor mostfrequently occurred in the mandibular molar region. Histopathology revealed that the tooth-like hard mass showed various developmental stages and resembled immature odontoma.<BR>W e considered this tumor as an odontoma in the early stage because of the similarity in clinical and histopathological appearances.
特定非営利活動法人日本口腔科学会の論文