Midbuccal canals of maxillary molars evaluated by cone-beam computed tomography: endodontic management of two cases - Brito-Júnior, Manoel; Moreira Júnior, Gil; Normanha, João Américo; Silva, André Luís Faria e; Camilo, Carla Cristina; Savioli, Ricardo Novak; Saquy, Paulo César (Brazilian Dental Journal, 2013)