A Case of Dilated Odontoma Arising in Buccal Region of 3rd Molar Tooth of Mandible.

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A case of dilated odontoma was reported. The patient, a 37-year-old male, was referred to our clinic for evaluation of the left mandible. A transparent lesion l0mm in diameter was observed in the buccal region of left 3rd molar tooth of mandible in panoramic and dental X-ray films. Clinically, the lesion was diagnosed as odontoma and surgically extirpated under local anesthesia with extraction of 8. The extirpated material was mostly composed of hard tissue, and macroscopically various degrees of hard tissue was arranged in a circle. Histologically, the outer layer was composed of cementum with gradual transition to bone tissue, inside of which was dentin with dentinal tubules and enamel. The center of the material was filled with irregular calcified tissue like cementum. Small root formation was also found. These findings were compatible with those of dilated odontoma. This case was a rare example of supernumerary tooth of the mandible.
特定非営利活動法人日本口腔科学会の論文