Group Filling technique Retreatment system Straight/Curved
canal		 Mean time (SD)
I LC ProFile® Straight 148.1 (64.3)a
II LC ProFile® Curved 98.59 (39.71)bfg
III LC Reciproc® Straight 147.8 (67.9)a
IV LC Reciproc® Curved 84.27 (22.62)bg
V GM ProFile® Straight 275.1 (110.2)c
VI GM ProFile® Curved 218.82 (129.32)d
VII GM Reciproc® Straight 145.4 (88.5)af
VIII GM Reciproc® Curved 70.56 (32.96)eg

SD = Standard deviation, LC = Lateral condensation, GM = GuttaMaster®.
Different lower case letters indicate statistically significant differences in the vertical columns.
One-way analysis of variance and Tukey’s test were used to evaluate the parametric data on the time required for filling removal.
P < 0.05 was considered statistically significant.