Efficacy of different cone-beam computed tomographic protocols in the identification of mesiobuccal canals of maxillary first molars: a tomographic and ex vivo study - Freitas, Jéssica Vavassori de; Baratto Filho, Flares; Coelho, Beatriz Serrato; Tomazinho, Flávia Sens Fagundes; Crozeta, Bruno Monguilhott; Sousa Neto, Manoel Damião de; Gabardo, Marilisa Carneiro Leão (JOE - Journal of Endodontics, 2017)