Yılmaz, KorayÖzyürek, TahaUslu, Gülşah2025-01-272025-01-2720191302-58052146-2852https://doi.org/10.7126/cumudj.477218https://search.trdizin.gov.tr/tr/yayin/detay/386023https://hdl.handle.net/20.500.12428/17373Objectives: To compare the cyclic fatigue resistances of One Curve (OC), HyflexEDM (HEDM), WaveOne Gold (WOG), Reciproc Blue (RPC Blue), and nickeltitanium rotary files at intra-canal temperature (35°C).Materials and Methods: Twenty OC (25/.06), 20 HEDM (25/.08), 20 WOG(25/.07) and 20 RPC Blue (25/.08) files were tested for cyclic fatigue at intracanal temperature (35°C). All the instruments were rotated in artificial which weremade of stainless steel with an 60° angle of curvature and a radii of curvatures of5 mm until fracture occurred, and the time to fracture was recorded in secondsusing a digital chronometer and the number of cycles to fracture (NCF) for eachfile was calculated. The Kruskal-Wallis test was performed to statistically analyzethe data by using SPSS 21.0 software. The statistical significance level was set atp<.05.Results: NCF values revealed that the HEDM had the highest cyclic fatigueresistance at intracanal temperature (p<.05) and followed by WOG, RPC Blue andOC. The lowest NCF values were determined in the OC group and statisticallysignificant difference was observed between the OC group the other groups(p<.05). No statistically significant difference in the mean length of the fracturedfragments in curvature was evident for the instruments (p>.05).Conclusion: Within the limitations of the present in-vitro study, HEDMinstrument resisted static cyclic fatigue significantly more than RPC Blue, WOGand OC instruments.eninfo:eu-repo/semantics/openAccessDiş Hekimliğiİmalat MühendisliğiArticle221424710.7126/cumudj.477218386023