the new generation of rotating files through a safe and predictable protocol. Methods: Three
clinical cases were described. A safe protocol was explained using the latest generation of
rotating files for the shaping of the anatomy of complex root canals. All the cases presented
90°, 45° curvatures and/or double curvatures. Results: The instrumentation of canals
increased their surface area and volume. All the cases with 90° and 45° curvatures were …