Table 1: Mean value (SD) of scores in the 3 different regions according to the activation system used.

Distribution of Scores per Region
EndoActivator Ultrasound Non-Activated
Mean Mean Mean
Apical 3.00 (1.33)a 3.83 (0.38)a 3.89 (0.32)a
Middle 1.61 (1.42)b 2,78 (1.40)c 3.50 (1.04)c
Cervical 1.50 (1.15)b 2.67 (1.46)c 3.39 (0.70)c

*Values with different superscript letters were statistically different at P = .05.