Research Article
Mechanical and Metallurgical Properties of Various Nickel-Titanium Rotary Instruments
Figure 1
Fracture resistance testing devices used in this study. (a) The torsion testing machine (Vortex-i, Mecmesin Co., Slinfold, UK) and (b) the operating part from (a), magnified. The shaft is mounted on the upper part and the file tip is tightly bound at the lower part. (c) The cyclic fatigue tester (Denbotix, Bucheon, Korea), and (d) the artificial canal of the cyclic fatigue tester. The right part was used in this study.
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