Comparison of Post-operative Pain After Different Root Canal Irrigant Activation Methods

passive ultrasonic irrigant activation will be performed by using a stainless steel ultrasonic Irrisafe file of size 20 (IRRI S 21/25; VDW, Germany) mounted on ultrasonic unit (Woodpecker Ultrasonic Scaler UDS-J). The file will be kept 2 mm short of working length loosely without binding to the canal. 2.5% NaOCl will be activated for 30 seconds by using a power setting of five

root canals will be filled with 2.5% sodium hypochlorite and medium size tip (red, 25/04) of EndoAcivator (YAHOPE A3, China) will be used keeping it 2 mm short of working length. The activation of irrigant will be done in 2-3 mm vertical strokes for 30 seconds in between each instrumentation