Abstract
The aim of this study was to evaluate the effect of sterilization on the cyclic fatigue resistance of Reciproc Blue rotary files and One Curve rotary files. Methods: For each test of the cyclic fatigue thirty files of each system were used. Ten of the thirty rotary files were used new, ten rotary files after three sterilization cycles and ten rotary files after six sterilization cycles. For cyclic fatigue testing a static model was used with a specific device, which allowed the instruments to rotate freely inside a Stainless-Steel artificial canal. Results: The results showed higher cyclic fatigue of Reciproc Blue than One Curve with no effect of sterilization on Reciproc Blue and decreeing in the cyclic fatigue resistance for One Curve. Conclusions: Reciproc Blue has higher cyclic fatigue resistance than One Curve. With no effect of sterilization on cyclic fatigue of some files while have negative effect on others.
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