“Prevalence of Untreated Second Canal in the Mesiobuccal Root of Maxillary Molars and Its Association With Apical Periodontitis: A Cone Beam Computed Tomography Study”. Research, Society and Development, vol. 10, no. 2, Feb. 2021, p. e55410212906, https://doi.org/10.33448/rsd-v10i2.12906.