Root canal area increase promoted by the endosequence and protaper systems: comparison by computed tomography - Bernardes, Ricardo Affonso; Rocha, Emerson Antunes; Duarte, Marco Antônio Húngaro; Vivan, Rodrigo Ricci; Moraes, Ivaldo Gomes de; Bramante, Alexandre S.; Azevedo, José Ribamar de (Journal of Endodontics, 2010)