TODENTJ-25-03-2019_TODENTJ-10-546 1553506658 Bentham Open doi@benthamopen.net Bentham Open The Open Dentistry Journal TODENTJ 1874-2106 10 07 2016 10 1 Giuseppe Troiano Mario Dioguardi Armando Cocco Giovanni Giannatempo Luigi Laino Domenico Ciavarella Elio Berutti Lorenzo Lo Muzio Objective: To assess the influence of operator experience on: shaping and centering ability, mean preparation time and presence of canal aberrations of ProTaper Universal and WaveOne systems on simulated root canals. Materials and Methods: Sixty S-shaped canals in resin blocks were assigned to four groups (n=15 for each group). Group1 (Experienced operator, ProTaper), Group2 (Experienced operator, WaveOne), Group3 (Inexperienced operator, ProTaper), Group4 (Inexperienced operator, WaveOne). Photographic method was used to record pre- and post-instrumentations images. After superimposition, it has been evaluated presence of canal aberrations and differences in shaping and centering ability between groups. Results: WaveOne system produced a lower amount of canal aberrations both in the hand of expert than inexpert operators. However, a WaveOne instrument breakage occurred in the hands of an inexperienced operator. No differences have been found in the evaluation of shaping ability with both systematics. Operator’s experience doesn't influence the shaping ability of ProTaper and WaveOne systems. Conclusion: Experience factor could influence the centering ability in the use of both the systematics. However, WaveOne Primary reduce the mean preparation time and the presence of canal aberrations. 10 07 2016 546 552 TODENTJ-10-546 1 10.2174/crossmark_policy opendentistryjournal.com benthamopen.com true Peer Reviewed Single blind Checked with iThenticate 2016-02-24 2016-07-20 2016-09-02 2016-10-07 https://creativecommons.org/licenses/by/4.0/legalcode 10.2174/1874210601610010546 1553506658 https://opendentistryjournal.com/VOLUME/10/PAGE/546/ https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-546/TODENTJ-10-546.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-546/TODENTJ-10-546.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-546/TODENTJ-10-546.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-546/TODENTJ-10-546.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-546/TODENTJ-10-546.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-546/TODENTJ-10-546.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-546/TODENTJ-10-546.pdf https://opendentistryjournal.com/contents/volumes/V10/TODENTJ-10-546/TODENTJ-10-546.xml Int. 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