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See Latest ArticlesInfluence of Rotational Speed on the Cyclic Fatigue of Rotary Nickel-Titanium Endodontic Instruments
Journal of Endodontics, 07/13/09
Lopes HP et al. - During the preparation of curved canals, rotary nickel-titanium (NiTi) instruments are subjected to cyclic fatigue, which can lead to instrument fracture. Although several factors may influence the cyclic fatigue resistance of instruments, the role of the rotational speed remains uncertain. This study was intended to evaluate the effects of rotational speed on the number of cycles to fracture of rotary NiTi instruments. The present findings for both F3 and F4 ProTaper instruments revealed that the increase in rotational speed significantly reduced the number of cycles to fracture.
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