Efficacy of QMix with Canal Brush for Removal of Debris and Smear Layer in Root Canals Instrumented with ProTaper Next and WaveOne File

Introduction: QMix is a newer formulation known to be a more effective irrigant. A polypropylene canal brush facilitates the introduction of surfactant in the canal. Objective: To assess the efficacy of QMix with canal brush to eliminate smear layer and debris in a root canal that is instrumented with ProTaper Next and WaveOne files under scanning electron microscope. Methods: Forty single-rooted premolars were allocated into four groups:1) ProTaper Next file, 2) ProTaper Next file + Rotary Canal Brush, 3) WaveOne file, 4) WaveOne file + Rotary Canal Brush. All files were used up to size 40 in their respective tapering. For irrigation, sodium hypochlorite (5.25%) was used throughout instrumentation and QMix was used after instrumentation. The rotary canal brush in assigned groups was used for 30 sec along with QMix, followed by irrigation with 5ml distilled water. The roots were sectioned into two halves and analyzed under SEM. Results: The mean scores for debris and smear layer were lesser in WaveOne and WaveOne with canal brush groups compared to other groups. Conclusion: The use of canal brush created cleaner canal walls than without canal brush. The most superior results were delivered by WaveOne rotary file.