In vitro Evaluation of Cyclic Fatigue Resistance of Reciprocating and Rotary Single-file System

Abstract

Aim:In vitro study evaluation of the cyclic fatigue resistance of reciprocating and rotary single-file system [Wave One Gold (WOG), Reciproc, Hyflex electrical discharge machining (EDM) file systems] utilizing cyclic fatigue testing device. Materials and methods:Three nickel-titanium rotary systems (Hyflex EDM size #25, 0.06 taper and Reciproc and WOG size #25, 0.06 taper) were used in this study. Ten files were used in each file system, which are 25 mm long and tested with cyclic fatigue and torsional resistance tests.Results: Each file was tested in the simulated root canal until instrument fracture occurred. Hyflex EDM has high mean and standard deviation of 116.23 ± 4.41, followed by WOG (64.85 ± 3.34) and Reciproc (35.28 ± 2.32). Conclusion:Within the limitations of this study, Hyflex EDM exhibited the greater cyclic fatigue resistance when compared with other rotary and reciprocating files.

Cyclic Fatigue Resistance of Wave One Gold, F6 SkyTaper, One Curve, and AF Blue R3 NiTi Rotary Instrumentation Systems

“…Considering that this study aimed to examine the physical properties of NiTi rotary files, the extracted teeth were unsuitable models as no two root canals are exactly identical [23] . One operator has examined the files, whereas the other operater has operated the stopwatch [24] . The Wave One Gold, AF Blue R3, One Curve, and F6 SkyTaper NiTi rotary instrumentations were selected given their differing cross sections, processing metallurgic altration, and rotation axes.…”