Effect of Cetrimide Addition on the Smear Layer Removal of EDTA Irrigant on Dentin
This study aimed to assess the smear layer removal efficacy of 17% EDTA mixed with different concentrations of cetrimide. Twenty-five single-rooted teeth were instrumented using rotary instruments. The teeth were randomly divided into 5 groups, and final flushes were performed with different solutions; distilled water, 17% EDTA and 17% EDTA mixed with 0.25%, 1% and 2% cetrimide. All specimens were longitudinally split and prepared for scanning electron microscope evaluation. Three different areas of apical root canal wall of each specimen were observed. Smear layer scores were assessed and the data were analyzed using the Kruskall-Wallis and Mann-Whitney U tests. Under the conditions tested in this study, root canal irrigation with the mixture of 17% EDTA and 0.25% cetrimide had more efficacies in smear layer removal compared to plain 17% EDTA.
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