effect of imidazolium based silver nanoparticle irrigant on root canal dentin roughness in comparison with three common irrigants

introduction : the aim of this study is to evaluate the effect of a newly introduced nanosilver based irrigant on dentin roughness in comparison with three commonly used root canal irrigants. material and methods : irrigants tested were: naocl 5.25%, edta 17%, chx 2% and newly introduced imidazolium-based silver nanoparticle (im agnp) irrigant at 5.8×10 -8 mol/l. distilled water was used as control. roots of 25 human anterior teeth were sectioned longitudinally to obtain 50 dentin samples. roughness values were evaluated by atomic force microscopy analysis on 5 groups of 10 samples after each group were treated in one of the tested irrigant solutions for 10 minutes. results: dentin roughness significantly increased from 95.82 nm (control) to 136.02 nm, 187.07 nm, 142.29 nm and 150.92 nm by naocl, chx, im agnp irrigant and edta respectively. chx demonstrated a significantly higher roughness value compared to the other irrigants tested while no significant differences were seen in naocl, im agnp irrigant and edta groups. (p>0.05) conclusions: im agnp irrigant affect physicochemical property of dentin and raised its surface roughness, thus, this irrigant could impact bacterial and restorative material adhesion to root canal dentin walls.