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Scanning electron microscopic appearances of Genius, Reciproc Blue and WaveOne Gold files after cyclic fatigue testing. Fractured surface view of (A) Genius File, (C) Reciproc Blue and (E) WaveOne Gold and high-magnification view of (B) Genius File, (D) Reciproc Blue and (F) WaveOne Gold instruments showing fatigue striations typical of cyclic fatigue (white arrows).
