Table 2: Incidence of canal aberrations on S-shape simulated root canals.

Aberration tipe	Apical Zip	Elbow	Ledges	Perforation	Danger zone	Instrument Breakage
Group 1	2	1	-	-	-	-
Group 2	-	-	-	-	-	-
Group 3	3	2	1	1	-	-
Group 4	1	1	-	-	-	1