Comparison of the cyclic fatigue resistance of ProGlider, PathGlider and One G path-finding instruments

Background. The aim of the present study was to compare the cyclic fatigue resistance of novel nickel titanium rotary path-finding instruments. Methods. Twenty instruments were selected for each file system. A simulated stainless steel root canal, with a 90° angle of curvature and a curvature radius of 3 mm, was used for cyclic fatigue test of the ProGlider (#16, progressive taper: 0.02‒0.085), PathGlider (#15, taper: .03), and One G (#14, taper: .03) instruments. Statistical analyses were performed with one-way ANOVA (P=0.05). Post hoc Tukey tests were used to determine any statistically significant differences between the groups. Results. The ProGlider instruments exhibited significantly more cyclic fatigue resistance than both PathGlider and One G instruments (P 0.001). One G instruments had significantly more resistance to fracture than PathGlider instruments (P 0.05). Conclusion. ProGlider instruments had better cyclic fatigue resistance than PathGlider and One G instruments.