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This study aimed to compare the cyclic fatigue resistance of Reciproc® instruments when used with different kinematics (150° counterclockwise (CCW)–30° clockwise (CW), 270° CCW–30° CW, 360° CCW–30° CW and continuous rotation). Various kinematics were tested in steel canals with a 3 mm radius and a 60° angle of curvature as follows (n = 20): 150° CCW–30° CW, 270° CCW–30° CW, 360° CCW–30° CW and 360°...
The purpose of the present study was to assess the effect of root canal instrumentation using Twisted File Adaptive instruments (Axis/SybronEndo, Orange, CA) with different kinematics (adaptive motion, 90° clockwise [CW]–30° counterclockwise [CCW], 150° CW–30° CCW, 210° CW–30° CCW, and continuous rotation) on crack formation.One hundred five mandibular central incisor teeth were selected. Fifteen...
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