Fig. 1From: Evaluation of stress distribution in nickel-titanium rotary instruments with different geometrical designs subjected to bending and torsional load: a finite element studyExperimental simulated conditions diagram. a Cantilever bending with a concentrated load of 1 N applied to the instrument tip. b Shear moment of 2.5 N mm applied to the shaft with the instrument fixed rigidly at 4 mm from the tipBack to article page