Table 1Multiple comparisons according to root canal regions Kruskal-Wallis statistical analysisScores 0123Median[IQR]PGroup 1 (Beveled Needle)Coronal Middle Apical- - -- - -8 5 17 10 142a 3ab 3b 0.023Group 2 (Double Side - Needle)Coronal Middle Apical- - --10 5 25 10 132a 3ab 3b 0.011Group 3 (CanalBrush)Coronal Middle Apical- - -- 3 114 9 71 3 72 2 20.098Group 4 (XP-endo FinisherCoronal Middle Apical- - -4 4 -11 9 7- 2 82a 2a 3b 0.001Group 5 (Vibringe)Coronal Middle Apical- - -2 1 -13 12 8- 2 72a 2ab 2b 0.004Group 6 (PUI)Coronal Middle Apical7 7 15 5 73 3 7- - -1a 1a 1b 0.029Group 7 (LAI)Coronal Middle Apical6 6 26 8 53 1 8- - -1ab 1a 2b 0.022