Quantitative Assessment of the Efficacy of Two Irrigation Activation Systems

XPF : The canals were flushed with 2.5 mL 2.5% NaOCl for 30 s and activated by a XPF instrument that was placed in the canal to 1 mm short of the WL and powered by the motor at 800 rpm (1 N-cm torque) for 30 s according to the manufacturer's instructions. Then the canals were rinsed with 2.5 mL of 2.5% NaOCl, followed by activation of the substance with the XPF instrument for 30 seconds, the same way as above. A new XP-endo Finisher file was used for each canal.

The root canals were irrigated with 2.5 mL of 2.5% NaOCl for 30 s, followed by sonic activation of this solution with EndoActivator red tip size #25/0.04, inserted into the root canal 1 mm short of the WL, at 10,000 cpm/min. for 30 seconds. The EA polymer tip moved vertically from apical to coronal part of the canal during activation.