Fig. 1From: Effect of different axial speed patterns on cyclic fatigue resistance of rotary nickel-titanium instrumentsa Custom-made cyclic fatigue testing device. (1) movable test stand, (2) handpiece, (3) attached stainless steel artificial canal, (4) emergency stop button, (5) indicator, (6) setting button, (7) start and manual speed adjustment buttons and (8) stop button. b Stainless steel artificial canal (arrow). c Schematic diagrams of stainless steel artificial canalBack to article page