Analysis of instrumentation protocols regarding the quality of mesial canal preparation in mandibular molars: a micro-computed tomographic study - Vivacqua, Flavia Darius; Duarte, Marco Antonio Hungaro; Vivan, Rodrigo Ricci; Alcalde, Murilo Priori; Furlan, Renan Diego; Bramante, Clovis Monteiro (Journal of Endodontics, 2021)