COMPARISON OF CYCLIC FATIGUE RESISTANCE OF FOUR DIFFERENT ROTARY NI-TI INSTRUMENTS (IN-VITRO STUDY)

Amira Alsherbini*, Medhat Taha El Faramawy and Tariq Yehia Abdelrahman

ABSTRACT

Introduction: The aim of this study was to evaluate the cyclic fatigue resistance of Plex V, M Pro, Woodpecker W3-Pro, and Fanta AF Blue rotary files in a custom-made simulated canals with different radii and curvatures at body temperature. Methods: A total of 80 files(Plex V,M Pro, Woodpecker W3-Pro,and Fanta AF Blue) Size 25/.06 were assessed inside two simulated canals [(60 curvature, 3 mm radius) and (45 curvature, 5 mm radius)]at 37 ± 0.5 degrees Celsius. Number of cycles to fracture (NCF) was recorded. Results: Plex V had the highest cyclic fatigue resistance in severe canal curvature, followed by Woodpecker W3 Pro and the least cyclic fatigue resistance was for Fanta AF Blue. While in moderate canal curvature there was no significant difference between four groups. Conclusion: Plex V files had the highest cyclic fatigue resistance in severe canal curvature among the four types evaluated. With no difference between four groups in moderate canal curvature.

Keywords: Cyclic fatigue, Plex V, M Pro, Woodpecker W3-Pro, Fanta AF Blue.