Microscopic computerized tomographic evaluation of root canal transportation prepared with twisted or ground nickel-titanium rotary instruments - Freire, Laila Gonzales; Gavini, Giulio; Branco-Barletta, Fernando; Sanches-Cunha, Rodrigo; Santos, Marcelo dos (Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology, and Endodontology, 2011)