Debris and smear removal in flattened root canals after use of different irrigant agitation protocols - Ribeiro, Eduardo Milani; Silva-Sousa, Yara T. C; Souza-Gabriel, Aline Evangelista; Sousa Neto, Manoel Damião de; Lorencetti, Karina Torales; Silva, Silvio Rocha Correa (Microscopy Research and Technique, 2012)