Comparative Study on in Vitro of the Degree of Smear Layer Removal in Root Canals Instrumented With Protaper Rotary Technique Using Final Irrigation With 17% EDTA Followed by Sodium Hypochlorite (NaOCl) at 5.25% or Qmix. OI 2015, 1 (2). https://doi.org/10.18272/oi.v1i2.191.