At the apical region, a new bifurcation of the distal canal occurred giving rise to a palatal root, which was approximately 2 mm longer than the distobuccal root with similar morphometric measurements. ![]() The distal canal was oval shaped with a large major diameter, and the mesial canal presented lower values of major and minor diameters and a more rounded canal then the distal canal. In the middle-third of the root, the main canal bifurcated into a mesial and distal canal. At the cervical portion, a single wide canal was observed. The tooth’s crown had normal morphological characteristics but with grooves in the buccal aspects and in both the proximal aspects that started from the cemento-enamel junction and advanced towards the apical direction. A quantitative analysis of the canal, roundness, and major and minor diameters was performed. The tooth was scanned using a micro-CT device and analyzed at 1 mm, 2 mm, and 3 mm from the apex, and cervical and middle-third of the root were selected. ![]() To describe a detailed analysis of the internal anatomy of an extracted maxillary central incisor with a rare anatomical variation, containing three roots and three canals using micro-computed tomography (CT). Clovis Monteiro Bramante, Murilo Priori Alcalde, Pablo Andrés Amoroso-Silva, Alexandre Silva Bramante, Helberth Gonzalis Giraldo, Rodrigo Ricci Vivan, and Marco Antonio Hungaro Duarte discuss possible anatomical variations that can be of consequence even in those teeth considered as less complex Abstract
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