Research Information System
International Endodontic Journal, vol.49, no.4, pp.382-385, 2016 (SCI-Expanded)
© 2016 International Endodontic Journal. Published by John Wiley & Sons Ltd.Aim: To evaluate the influence of movement kinematics when using Twisted File Adaptive instruments (SybronEndo, Orange, CA, USA) (TF Adaptive) on the amount of apically extruded debris. Methodology: Forty-eight extracted mandibular incisor teeth were selected. The teeth were randomly divided into four groups (n = 12), and the root canals were instrumented using the following movement kinematics: TF Adaptive motion, 90° clockwise (CW) to 30° counterclockwise (CCW) reciprocating motion, 150°CW to 30°CCW reciprocating motion or continuous rotation. TF Adaptive instruments were used for all groups. Debris extruded apically during instrumentation was collected in pre-weighed Eppendorf tubes, and after drying, the mean weight of the debris was assessed with an electronic balance. The data were analysed statistically using a one-way analysis of variance. Results: The 90° CW to 30° CCW reciprocating motion produced the highest mean extrusion value, and this was significantly greater when compared with continuous rotation (P < 0.05). 150° CW to 30° CCW reciprocating, adaptive and continuous rotation motions produced similar amounts of debris extrusion (P > 0.05). Conclusion: Movement kinematics affected the amount of apically extruded debris when using Twisted File Adaptive instruments.