Fracture Resistance of K3 Nickel-Titanium Files Made from Different Thermal Treatments

Figure 1

(a) Fatigue tester (Denbotix, Bucheon, Korea). (b) Artificial canal of fatigue tester; right part (curvature angle of 60°) was used in this study. (c) Torsion testing machine (Vortex-i, Macmesin Co., West Sussex, UK). (d) NiTi file engagement of (c) was magnified.

(a)

(b)

(c)

(d)