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

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