Vol. 5, Issue 2, Part C (2019)

Abstract: The present study was conducted to compare two different irrigation techniques in patients undergoing endodontic therapy.It comprised of 60 freshly extracted mandibular premolars. Teeth were divided into 3 groups of 20 each. In group I (Control), teeth were irrigated with distilled water solution during preparation, In group II teeth were irrigated with 5.25% sodium hypochlorite &17% EDTA and in group III teeth were irrigated 5.25% sodium hypochlorite and 17% EDTA agitated with Passive Ultrasonic Irrigation. The samples were prepared and observed under a scanning electron microscope (SEM). The photomicrographs were recorded and evaluated with a scoring system. There was significant difference in occurrence of smear layer at different level of tooth surface in group I whereas no significant difference was observed in group II and group III.