Table 2: Provides mean and standard deviation for the retreatment time (T1, T2 and T3) across all systems and groups.

Time System Groups
Mean ± SD
A* B* Mean (A*, B*)
T1 Reciproc 87.9Aa ± 25.46 26.82Ab ± 7.55 57.36AB ± 36.27
PTN 87.61Aa ± 34.75 35.54Ab ± 7.46 61.58A ± 36.22
R-Endo 51.4Ba ± 9.48 39.24Aa ± 12.76 45.32B ± 12.59
Mean (Rec, PTN, R-Endo) 75.63a ± 30.13 33.87b ± 10.66
T2 Reciproc 205.95Aa ± 81.95 52.29Ab ± 21.71 129.12A ± 98.72
PTN 91.67Ba ± 37.84 58.5Aa ± 25.77 75.09B ± 35.81
R-Endo 91.81Ba ± 37.38 56.96Aa ± 17.5 74.38B ± 33.57
Mean (Rec, PTN, R-Endo) 129.81a ± 77.21 55.92b ± 23.2
T3 (T1+T2) Reciproc 293.85Aa ± 91.69 79.1Ab ± 26.26 186.47A ± 128.23
PTN 179.28Ba ± 45.02 94.05Ab ± 27.56 136.66B ± 56.86
R-Endo 143.21Ba ± 43.61 96.2Aa ± 16.89 119.7B ± 40.22
Mean (Rec, PTN, R-Endo) 205.44a ± 89.98 89.87b ± 24.46 89.87b ± 24.46

Means with the same letter are not significantly different from each other; lowercase letters indicate significant differences between groups (P < 0.05); uppercase letters indicate significant differences among systems (P < 0.05) A* = Gutta-percha/Sealer; B* = GuttaFlow; T1 = time to reach WL; T2 = time for complete removal of filling material.