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.