Bending properties of a new nickel-titanium alloy with a lower percent by weight of nickel |
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Authors: | Testarelli Luca Plotino Gianluca Al-Sudani Dina Vincenzi Valentina Giansiracusa Alessio Grande Nicola M Gambarini Gianluca |
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Affiliation: | ∗ Department of Endodontics, “Sapienza” University of Rome, Rome, Italy † Department of Endodontics, KSU University, Riyadh, Saudi Arabia |
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Abstract: | IntroductionThe aim of the present study was to evaluate the bending properties of Hyflex instruments, which exhibit a lower percent in weight of nickel (52 Ni %wt) and compare them with other commercially available nickel-titanium (NiTi) rotary instruments.MethodsTen instruments with tip size 25, 0.06 taper of each of the following NiTi rotary instrumentation techniques were selected for the study: Hyflex, EndoSequence, ProFile, Hero, and Flexmasters. All instruments from each group were tested for stiffness by comparing their bending moment when they attained a 45-degree bend. Experimental procedures strictly followed testing methodology described in ISO 3630-1. All data were recorded and subjected to statistical evaluation by using analysis of variance test. Statistical significance was set at P < .05).ResultsStatistical analysis of the data revealed that Hyflex files were found to be the most flexible instruments, with a significant difference (P < .05) in comparison with the other instruments. Among the other files, a significant difference has been reported for EndoSequence instruments compared with ProFile, Hero, and FlexMaster (P < .05), whereas no significant differences have been reported among those 3 files (P > .05).ConclusionsResults of the present study have illustrated an increased flexibility of the new NiTi alloy over conventional NiTi alloy, and they highlight the potential of the new manufacturing process. |
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Keywords: | Endodontic instruments flexibility nickel-titanium thermal treatments |
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