Passive ultrasonic irrigation, EndoActivator system and XP-endo Finisher R as additional cleaning techniques to remove residual filling materials from flattened root canals - Baumeier, Nicole Carmo; Duarte, Marco Antonio Hungaro; Vivan, Rodrigo Ricci; Lemos, Arthur Costa; Machado, Ricardo; Silva Neto, Ulisses Xavier da (Journal of Conservative Dentistry and Endodontics, 2022)