DILATED ODONTOMA ASSOCIATED WITH A DENTAL ROOT: A CASE REPORT

Luis Augusto De Almeida Silva,Ana Beatriz Simeão Gonçalves,Gabriela Ribeiro Zucco,Luis Ronaldo Picosse,Jorge Luiz Reis De Oliveira,Camila Porto De Deco,Ana Lia Anbinder

doi:10.1016/j.oooo.2023.03.159

Abstract

Dens invaginatus is an anomaly resulting from the enamel organ invagination into the dental papilla. When the invagination is extreme, it can dilate the crown and root, generating a so-called dilated odontoma, which is rare in the posterior mandible. A 47-year-old female presented an asymptomatic radiopaque mass attached to the distal root of the second lower molar, surrounded by a radiolucent halo. Computed tomography revealed a hypodense image within the mass. With the hypothesis of fusion, concrescence, and odontoma, the tooth and the lesion were removed. After demineralization, the material was hemisectioned, and a cavity within the calcified mass could be seen. Microscopic examination revealed that the mass consisted of tubular dentin, containing a cavity filled with empty clefts and irregular calcified tissue, consistent with the diagnosis of dilated odontoma. The radiological appearance of a dilated odontoma may vary, when the histological analysis is key to the final diagnosis. Dens invaginatus is an anomaly resulting from the enamel organ invagination into the dental papilla. When the invagination is extreme, it can dilate the crown and root, generating a so-called dilated odontoma, which is rare in the posterior mandible. A 47-year-old female presented an asymptomatic radiopaque mass attached to the distal root of the second lower molar, surrounded by a radiolucent halo. Computed tomography revealed a hypodense image within the mass. With the hypothesis of fusion, concrescence, and odontoma, the tooth and the lesion were removed. After demineralization, the material was hemisectioned, and a cavity within the calcified mass could be seen. Microscopic examination revealed that the mass consisted of tubular dentin, containing a cavity filled with empty clefts and irregular calcified tissue, consistent with the diagnosis of dilated odontoma. The radiological appearance of a dilated odontoma may vary, when the histological analysis is key to the final diagnosis.

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