Yigt, Esra tremCetinkaya, Trem2024-06-122024-06-1220242168-8184https://doi.org/10.7759/cureus.52916https://hdl.handle.net/20.500.14551/22721Background This study aims to analyze the phase transformation behavior and evaluate the effect of different temperatures on the fracture strength of files. Methodology A total of 108 files were used, and cyclic fatigue tests were performed on HyFlex EDM, VDW.ROTATE, and TruNatomy at three different temperatures (+4 degrees C, +35 degrees C, and +60 degrees C) The time to fracture of files was measured, and the number of cycles was calculated. In addition, the fractured fragment lengths were measured. The Kruskal-Wallis test was used to compare the data that were not normally distributed according to groups. The Mann-Whitney U test was performed for comparisons. P-values <0.05 were considered statistically significant. Results As the temperature increased for all files, the number of cycles to fracture (NCF) decreased. NCF was significantly higher for ROTATE at 4 degrees C and 60 degrees C and HyFlex EDM at 35 degrees C. Conclusions The resistance to cyclic fatigue in all files decreased significantly as the temperature increased.en10.7759/cureus.52916info:eu-repo/semantics/openAccessNickel TitaniumMartensiteAusteniteDscCyclic FatigueRotary Nickel-TitaniumIn-VivoFilesArticle161N/AWOS:00115565230004038406139