title: Comparison of cyclic fatigue resistance between different NiTi instruments with 4% taper.
abstract: The aim of this study was to make a comparison between the cyclic fatigue (CF) resistance of F360, twisted files (TF), FlexMaster (FM) and RaCE instruments with 4% taper. A total of 40 instruments were evaluated 8 mm from the tip. A stainless steel block with a simulated canal of 1.5 mm diameter, and a 60° angle of curvature was tested using CF testing. One-way ANOVA and posthoc Tukey's test (P < 0.05) were used. The F 360 files showed the highest CF resistance while the TF files had greater CF resistance than the FM and RaCE (P < 0.05). There was no significant difference between the FM and RaCE (P > 0.05). F360 instruments with a double S cross-section had the highest CF resistance among the group. The TF led the NiTi rotary files to be more resistant to fatigue than the FM and RaCE instruments.
authors: Department of Endodontics, Sifa University, Izmir, Turkey.
authors: Ibrahim
authors: I
authors: Ersoy
authors: Department of Endodontics, Ataturk University, Erzurum, Turkey.
authors: Elif
authors: E
authors: Kol
authors: Department of Endodontics, Ataturk University, Erzurum, Turkey.
authors: Ahmet Demirhan
authors: AD
authors: Uygun
authors: Department of Pedodontics, Sifa University, Izmir, Turkey.
authors: Mehmet
authors: M
authors: Tanriver
authors: Department of Endodontics, Ataturk University, Erzurum, Turkey.
authors: Fatih
authors: F
authors: Seckin
keywords: F360; FlexMaster; RaCE; cyclic fatigue; twisted file