Vol. 24 No. 1 (2025)
Original Articles

Analysis of the occurrence of the mesiobuccal canal in maxillary first molars using cone-beam computed tomography in a brazilian population

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  • Bruna Ayumi Nishijo,
  • Aline Lie Ishida,
  • Isabela I. Kussaba,
  • Felipe S. Martinhão,
  • Joana Yumi T. Uchimura,
  • Alfredo F. Queiroz
Bruna Ayumi Nishijo
Universidade Estadual de Maringá
DOI: https://doi.org/10.12957/bbjhbs.2025.93429

Published 2025-08-08

Keywords

  • Second Mesiobuccal,
  • Molar tooth,
  • Cone beam computed tomography

How to Cite

1.
Nishijo BA, Ishida AL, I. Kussaba I, S. Martinhão F, T. Uchimura JY, F. Queiroz A. Analysis of the occurrence of the mesiobuccal canal in maxillary first molars using cone-beam computed tomography in a brazilian population. BJHBS [Internet]. 2025 Aug. 8 [cited 2025 Oct. 10];24(1):21-6. Available from: https://bjhbs.hupe.uerj.br/bjhbs/article/view/208

Copyright (c) 2025 Brazilian Journal of Health and Biomedical Sciences

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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

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Abstract

Introduction: Although the success rate of endodontic treatment in molars can reach up to 91.7%, failures may occur due to the anatomical complexity of the canals and the presence of undetected canals, with the second mesiobuccal canal being the most frequently overlooked. Objectives: To assess the morphology of the first upper molar and the incidence of the second mesiobuccal canal using cone beam computed tomography. Materials and Methods: Retrospective secondary data were collected from patients at a reference radiology clinic in Maringá, Paraná, who underwent imaging exams with the Prexion 3D tomography machine between December 2015 and May 2016. Results: A total of 174 patients and 221 first upper molars were analyzed, with a higher prevalence of three roots (93%) and the presence of the second mesiobuccal canal in 57.4% of the teeth. The most frequent Vertucci classification was type IV (38%). Conclusion: The study concluded that the first upper molar has a prevalence of three roots, with the second mesiobuccal canal present in more than half of the studied population, and the most common classification for this canal was type IV.

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