Sodium hypochlorite (NaOCl) is one of the most commonly used irrigants at a concentration ranging from 0.5% to 6%. It is well known for its antibacterial properties and tissue dissolving activity. Since, it has no effect on the inorganic part of the smear layer, Goldman in 1982 recommended that 17% ethylenediaminetetraacetic acid (EDTA) be used after NaOCl irrigation for complete removal of the smear layer.3