(a)
(b)
Figure 3: Results from the bending resistance test. (a) Representative graph of bending moment (N·mm)-deflection (mm) curves obtained in the bending resistance test. (b) Bending moment of four different NiTi rotary files. Groups with different letters indicate a statistically significant difference (). OS, One Shape; PTN, ProTaper NEXT; V2H, V taper 2H.