Abstract:

Aim:The aim of this study was to evaluate the effect of different irrigation protocols on removing the smear layer from root canals. Materials and Methods: 80 human lower molar teeth were used in the study. The distal roots of teeth were removed from crowns over 1mm of cementoenamel junction. Following the detection of working length, root canal preparation were performed by using Reciproc system. The samples were divided into 4 groups. 20 randomly selected human lower molar teeth were used in each group. In the first group, the irrigation combined with the solutions of 5% of sodium hypochlorite and 17% of etilen diamine tetra acetic acid (EDTA) were made and no activation applied. In the second group, the irrigation combined with the solutions of 2% of chlorhexidine gluconate and 17% of EDTA were made and no activation applied. In the third group, the irrigation combined with the solutions of 2% of chlorhexidine gluconate and 17% of EDTA were made and the activation applied with sonic system. And in the fourth group, the irrigation combined with the solutions of 2% chlorhexidine gluconate and 5% EDTA were made and the activation applied with sonic system. Then, the grooves in buccolingual and longitudinal directions were opened on teeth, and the samples were divided vertically. The samples obtained were analysed under scanning electron microscope (SEM), and the effect of the sonic system activation in different irrigation protocols on the elimination of smear layer were evaluated. Results: These were evaluated statistically with the Kruskal Wallis one-way analysis of variance. Only in the middle region of the Group 3 were seen statistical significant compared to others. Conclusion: When activities of different irrigation protocols were evaluated, sonic system activation was observed more efficient to remove the smear layer in the root canals. Also with syringe method, it was not observed any differences between the combinations of CHX-EDTA anda NaOCl-EDTA in the removal of smear layer.

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