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      Cyclic fatigue resistance of the WaveOne Gold Glider, ProGlider, and the One G glide path instruments in double-curvature canals

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          Abstract

          Objectives

          The aim of this study was to compare the cyclic fatigue resistance of the WaveOne Gold Glider, ProGlider and One G glide path instruments in artificial double-curvature canals.

          Materials and Methods

          This study included 15 WaveOne Gold Glider (size 15/0.08), 15 ProGlider (size 16/0.08), and 15 One G (size 16/0.06) nickel titanium files. The files were used in accordance with the manufacturer's instructions until they were broken in artificial double-curvature canals made of stainless steel. The time to fracture was recorded via a digital stopwatch and the number of rotations until fracture was also calculated. The data were statistically analyzed via the Kruskal-Wallis test.

          Results

          The highest average number of rotations until fracture of the files was found for the WaveOne Gold Glider, followed by ProGlider and One G in order. Statistically significant differences were present between all groups of files ( p < 0.05).

          Conclusions

          In our study, the resistance of the WaveOne Gold Glider nickel-titanium (Ni-Ti) file to cyclic fatigue in S-shaped curved canals was found to be higher than that of the ProGlider and One G Ni-Ti files.

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          Most cited references17

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          Cleaning and shaping the root canal.

          H Schilder (1974)
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            The relationship of root canal enlargement to finger-spreader induced vertical root fracture.

            The purpose of this study was to assess the effect of lateral condensation forces on the development of vertical root fracture (VRF) in teeth that have undergone controlled, measured internal root reduction (i.e. canal preparation). Thirty-four straight-rooted maxillary anterior teeth were used. For each tooth a simulated PDL was fabricated from a uniform 0.15 mm layer of silicone impression material. The teeth were mounted in resin to facilitate removal for observation. They were radiographed and measured at 2, 4, 6, and 8 mm from the apex. They were prepared with the step-back method so that the canal width was 20% of the total root width at 2, 4, 6, and 8 mm from the apex. They were obturated using a fine finger spreader attached to a jig that produced a static force of 3.3 kg for 15 s after placement of each gp point. Obturation was complete when the spreader did not penetrate apical to 8 mm from the apex. Twenty-four h after obturation the teeth were examined by transillumination for VRF. Teeth not exhibiting VRF were tested further after gp removal and canal enlargement of 30%, 40%, and 50% The teeth were sectioned at 2-mm increments with a diamond wafering saw and examined under stereomicroscope. No VRF occurred at 20% or 30%; 5 teeth fractured at 40% and 7 at 50%. These teeth had root surface craze lines that developed during testing. Craze lines had also developed in all 17 of the remaining unfractured samples. No VRF occurred after testing unless craze lines were previously present.
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              Cyclic fatigue of nickel-titanium rotary instruments in a double (S-shaped) simulated curvature.

              The goal of the present study was to test the fatigue resistance of nickel-titanium rotary files in a double curvature (S-shaped) artificial root canal and to compare those results with single curvature artificial root canals.
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                Author and article information

                Journal
                Restor Dent Endod
                Restor Dent Endod
                RDE
                Restorative Dentistry & Endodontics
                The Korean Academy of Conservative Dentistry
                2234-7658
                2234-7666
                November 2019
                09 September 2019
                : 44
                : 4
                : e36
                Affiliations
                Department of Endodontics, Faculty of Dentistry, Akdeniz University, Antalya, Turkey.
                Author notes
                Correspondence to Damla Kırıcı, DDS, PhD. Assistant Professor, Department of Endodontics, Faculty of Dentistry, Akdeniz University, P.K.10 Dumlupınar Bulvarı Kampüs, Antalya 07058, Turkey. d_ozsu@ 123456hotmail.com
                Author information
                https://orcid.org/0000-0001-8391-1034
                https://orcid.org/0000-0002-4942-3739
                Article
                2019440402
                10.5395/rde.2019.44.e36
                6875535
                31799164
                7fd1dc83-5684-4a98-bcb8-655d20fe78a5
                Copyright © 2019. The Korean Academy of Conservative Dentistry

                This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( https://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                : 08 June 2019
                : 15 July 2019
                : 20 July 2019
                Categories
                Research Article

                cyclic fatigue,proglider,waveone gold glider,one g
                cyclic fatigue, proglider, waveone gold glider, one g

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