Percorrer por autor "Sassi, Hiba El Haj"
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- Influence of operator experience on canal preparation time and pecking movements: an in vitro studyPublication . Sassi, Hiba El Haj; Reis, Tiago; Barbosa, CláudiaObjective: This in vitro study aimed to evaluate the influence of operator experience on canal preparation time and the number of pecking movements when using three nickel titanium (NiTi) endodontic instrumentation systems: ProTaper Gold®, WaveOne Gold®, and EndoGal®. Materials and Methods: Thirty-two extracted human molars with 60 curved root canals (curvature >20°) were divided into six groups. Three groups were prepared by an inexperienced operator (a dental student), and three by an experienced clinician with 24 years of practice. Each operator used all three instrumentation systems following the manufacturers’ protocols. Preparation time was recorded with a digital stopwatch by an independent observer, ensuring accurate measurement of active instrumentation time. Statistical analysis was performed to compare preparation times across systems and between operator experience levels. Results: WaveOne Gold® demonstrated the shortest preparation time for both experienced and inexperienced operators, with statistically significant differences compared to ProTaper Gold® and EndoGal® (p < .05). ProTaper Gold® required the longest preparation time. The experienced operator consistently performed significantly faster than the inexperienced operator across all systems (p < .001). Interestingly, the difference between operators was most pronounced with the ProTaper Gold® system, while the WaveOne Gold® system showed the least disparity, suggesting that reciprocating single-file systems may reduce the influence of operator experience. Conclusion: WaveOne Gold® provided superior time efficiency compared to ProTaper Gold® and EndoGal®, regardless of operator experience. These findings highlight the potential of reciprocating systems to improve procedural efficiency and shorten the learning curve for novice clinicians, making them valuable tools in both clinical and educational settings. Future research should also assess canal cleanliness, shaping ability, cyclic fatigue resistance, and patient-centered outcomes such as postoperative pain to provide a more comprehensive evaluation of these systems.