Comparison of cyclic fatigue resistance and bending properties of two reciprocating nickel-titanium glide path files

Abstract

Aim

To compare the cyclic fatigue resistance and bending properties of R-Pilot and WaveOne Gold (WOG) Glider files, at intracanal temperature (35°C).

Methodology

Forty R-Pilot and 40 WOG Glider files were subjected to a cyclic fatigue resistance test (n = 20), calculating the time to fracture (TTF) in an artificial stainless-steel canal. The length of the fractured file tips (FL) was also measured. The fracture surface of fragments was examined with a scanning electron microscope and the cross-sectional area of the fractured surfaces were measured. Flexibility of the tested files (n = 20) was determined by 45° bending test. Data were analyzed statistically using the Mann-Whitney U test at 5% significance level.

Results

Time to fracture value was found to be significantly higher in the R-Pilot group compared to the WOG Glider (P < 0.05). There was no significant difference between groups according to the fracture length. The bending resistance of R-Pilot files was significantly higher than WOG Glider files (P < 0.05).

Conclusions

A significant greater cyclic fatigue resistance was observed for R-Pilot files compared to WOG Glider instruments, although the bending resistance of WOG Glider files was lower.

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