Introduction: During the endodontic treatment, removal of smear layer and debris has been one of the important endeavours, thus producing cleaner ischolar_main canal walls. For this purpose different irrigants, like EDTA, NaOCl and Citric acid have been used along with different instrumentation techniques. Aim: This study was carried out to evaluate the combined effect of taper and different irrigating agents on the cleanliness of ischolar_main canal. Materials &Methods: 45 extracted mandibular premolars were divided into three groups, according to the taper produced, 2%, 4% and 6% with Hero Shaper files respectively, which were further divided into subgroups, according to the irrigation regime followed. The teeth were split and subjected to SEM analysis. Results: The results showed that the canals prepared to a taper of 6% and irrigated with 5.2% NaOCl and 25% Citric acid had less debris and smear layer, which was statistically significant. Conclusion: It was concluded that a taper of 6% facilitates irrigant delivery in the canal and 25% Citric acid is more potent demineralising agent than 17% EDTA.
Keywords
25% Citric Acid, 17% EDTA, 5.2% NaOCl, Scanning Electron Microscope.
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