Ali S Abu Naila
Department of Conservative and Esthetic Dentistry, University of Dentistry-Baghdad, IraqPublications
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Research Article
Cyclic Fatigue Resistance of Three Different Rotary Endodontic Instruments with Design Modification
Author(s): Ali S Abu Naila* and Hussain F Al-Huwaizi
Background: CF (Cyclic Fatigue) resistance of Dentsply Pro Taper Universal (PTU), Pro Taper Gold (PTG), and Pro Taper Next (PTN) nickel titanium (NiTi) rotary files was evaluated in comparision with simulated files with same design and our study design. Methods: For PTU and PTG study design modification is to leave the apical 8 mm of S1 and the apical 3 mm of S2 as unmilled, F1 only the apical 5 mm would have cutting blades. For PTN is to leave the apical 8 mm of X1 and, while for X2 is to leave the coronal 8 mm as un-milled. Ten instruments for each file (S1, S2, F1, X1 and X2); total 240 files (80 pieces for Dentsply, 80 pcs for simulated and 80 pieces for study design), files rotated in simulated canal until fracture. Conclusion: PTG instruments were most resistant to CF, followed by PTN and PTU. S1 and S2 files making the non-active.. Read More»