Materials and Methods: Thirty extracted human single rooted teeth, having a single canal were selected. The teeth were cleaned and shaped using a crown-down technique to a size 40 and filled with gutta-percha and a zinc oxide-eugenol-based sealer using a lateral compaction technique. Teeth was assigned into three group according to the system used for removing the root filling material Group 1- M Two Files, Group-II - Protaper D files and Group III - R Endo files. The amount of remaining filling material after the retreatment procedure was assessed utilizing a stereomicroscope.

Result: Statistical analysis revealed that Group 2 (Protaper D Files) showed highest efficiency in removing guttapercha.