الفهرس 
AcknowledgmentOnly 14 pages are availabe for public view
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Abstract
SThe aim of the present study was to compare the intensity and incidence of post-operative pain after the use of 1.3% NaOCl and 5.25% NaOCl irrigant concentrations in a parallel, randomized, controlled clinical trial.
Forty-four patients with non-vital lower first and second mandibular molars with or without periapical radiolucency underwent two-visit root canal therapy, where root canals were prepared using NiTi ProTaper Universal rotary system.