Pre-eruptive intracoronal resorption on cone beam computed tomography: two case reports

ABSTRACT Pre-eruptive intracoronal resorption (PIR) is a rare lesion that occurs within the dentin of the crown on unerupted teeth. The aim of this article is to report two rare cases of a PIR in impacted canine using cone beam computed tomography (CBCT). High resolution CBCT images (Prexion 3D) were indicated for evaluating of the non-erupted tooth, claiming no other related signs or previous historyto be considered. In the first case, the images revealed an impacted and mesioinclined superior canine. In the coronary portion, it was observed an irregular hypodense lesion, involving the dentin, enamel tissue, and communication with the external surface of the tooth. In the second case, the images showed an impacted superior canine in the vertical position. It also revealed a hypodense lesion with poorly defined limits envolving the dentin, which extends over the crown. In both cases, the tooth was not in contact with the adjacentlateral tooth. Therefore, PIR in impacted teeth is rare, which is frequently diagnosed through routine radiographs. Additionally, CBCT seems to be an invaluable tool for providing accurate information about the exact topography, relationships with adjacent structures, helping, therefore, on the appropriate treatment planning.