Fig. 3From: Comparison of Easydo Activator, ultrasonic and needle irrigation techniques on sealer penetration and smear layer removal in vitroRepresentative SEM images of ×1000 and ×2000 in the apical thirds in the (a, d) NI group, (b, e) PUI group, and (c, f) EA group. SEM, scanning electron microscopy; NI, needle irrigation; PUI, passive ultrasonic irrigation; EA, Easydo ActivatorBack to article page