Edition V07N03 | Year 2017 | Editorial Original Article | Pages 50 to 56
The aim of this study was to assess, in vitro, and by means of four criteria (radiographic, macroscopic, microscopic and serial section), the amount and configuration of root canals in maxillary and mandibular premolars. It is a crosssectional observational and descriptive study, in which 100 premolars were selected. Exclusion criteria comprised teeth destroyed by caries, presenting previous endodontic treatment, incomplete root formation, resorption and/or fractures. The teeth were divided into four groups (n = 25): G1 = maxillary first premolars; G2 = maxillary second premolars; G3 = mandibular first premolars; and G4 = mandibular second premolars. Results showed that 100% in G1 presented two root canals by macroscopic assessment, which were merged at various points of the root and had a higher prevalence of oval configuration (68%). G2 revealed 60% single root canals and oval shape (84%). The results obtained for G3 were single root and single canal (100%) and the incidence of oval configuration (72%). Finally, G4 had higher prevalence of a single root canal in single root (92%) with oval configuration (64%). Therefore, the methods used in this study revealed there was prevalence of oval root canals in all groups. Two root canals were predominant in maxillary first premolars, while in the other groups only a single root canal prevailed.
Matos HRM, Almeida-Gomes F, Viana LCTMC, Angelim-Dias A. In vitro study of maxillary and mandibular premolars internal morphology by means of four methods. Dental Press Endod. 2017 Sept-Dec;7(3):50-6. DOI: https://doi.org/10.14436/2358-2545.7.3.050-056.oar