Comparison of the cyclic fatigue resistance of One Curve, F6 Skytaper, Protaper Next, and Hyflex CM endodontic files
ObjectivesThis study compared the cyclic fatigue resistance of One Curve (C wire) and F6 Skytaper (conventional austenite nickel-titanium [NiTi]), and 2 instruments with thermo-mechanically treated NiTi: Protaper Next X2 (M wire) and Hyflex CM (CM wire).Materials and MethodsTen new instruments of ea...
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Korean Academy of Conservative Dentistry
2022-05-01
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| Series: | Restorative Dentistry & Endodontics |
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| Online Access: | http://www.rde.ac/upload/pdf/rde-47-e16.pdf |
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| author | Charlotte Gouédard Laurent Pino Reza Arbab-Chirani Shabnam Arbab-Chirani Valérie Chevalier |
| author_facet | Charlotte Gouédard Laurent Pino Reza Arbab-Chirani Shabnam Arbab-Chirani Valérie Chevalier |
| author_sort | Charlotte Gouédard |
| collection | DOAJ |
| description | ObjectivesThis study compared the cyclic fatigue resistance of One Curve (C wire) and F6 Skytaper (conventional austenite nickel-titanium [NiTi]), and 2 instruments with thermo-mechanically treated NiTi: Protaper Next X2 (M wire) and Hyflex CM (CM wire).Materials and MethodsTen new instruments of each group (size: 0.25 mm, 6% taper in the 3 mm tip region) were tested using a rotary bending machine with a 60° curvature angle and a 5 mm curvature radius, at room temperature. The number of cycles until fracture was recorded. The length of the fractured instruments was measured. The fracture surface of each fragment was examined with a scanning electron microscope (SEM). The data were analyzed using one-way analysis of variance and the post hoc Tukey test. The significance level was set at 0.05.ResultsAt 60°, One Curve, F6 Skytaper and Hyflex CM had significantly longer fatigue lives than Protaper Next X2 (p < 0.05). No statistically significant differences were found in the cyclic fatigue lives of One Curve, F6 Skytaper, and Hyflex CM (p > 0.05). SEM images of the fracture surfaces of the different instruments showed typical features of fatigue failure.ConclusionsWithin the conditions of this study, at 60° and with a 5 mm curvature radius, the cyclic fatigue life of One Curve was not significantly different from those of F6 Skytaper and Hyflex CM. The cyclic fatigue lives of these 3 instruments were statistically significantly longer than that of Protaper Next. |
| format | Article |
| id | doaj-art-d85b46a383d64ae9a0b980f1b1a7bd9f |
| institution | Matheson Library |
| issn | 2234-7658 2234-7666 |
| language | English |
| publishDate | 2022-05-01 |
| publisher | Korean Academy of Conservative Dentistry |
| record_format | Article |
| series | Restorative Dentistry & Endodontics |
| spelling | doaj-art-d85b46a383d64ae9a0b980f1b1a7bd9f2025-07-03T05:39:52ZengKorean Academy of Conservative DentistryRestorative Dentistry & Endodontics2234-76582234-76662022-05-01472e1610.5395/rde.2022.47.e161011Comparison of the cyclic fatigue resistance of One Curve, F6 Skytaper, Protaper Next, and Hyflex CM endodontic filesCharlotte Gouédard0Laurent Pino1Reza Arbab-Chirani2Shabnam Arbab-Chirani3Valérie Chevalier4Department of Pediatric Dentistry, Dental School-Hospital of Brest, FranceEcole Nationale d'Ingénieurs de Brest, Brest, FranceDepartment of Endodontics and Restorative Dentistry, Dental School-Hospital of Brest, University of Bretagne Occidentale, Brest, FranceEcole Nationale d'Ingénieurs de Brest, Brest, FranceUniversity of Bretagne Occidentale, Brest, FranceObjectivesThis study compared the cyclic fatigue resistance of One Curve (C wire) and F6 Skytaper (conventional austenite nickel-titanium [NiTi]), and 2 instruments with thermo-mechanically treated NiTi: Protaper Next X2 (M wire) and Hyflex CM (CM wire).Materials and MethodsTen new instruments of each group (size: 0.25 mm, 6% taper in the 3 mm tip region) were tested using a rotary bending machine with a 60° curvature angle and a 5 mm curvature radius, at room temperature. The number of cycles until fracture was recorded. The length of the fractured instruments was measured. The fracture surface of each fragment was examined with a scanning electron microscope (SEM). The data were analyzed using one-way analysis of variance and the post hoc Tukey test. The significance level was set at 0.05.ResultsAt 60°, One Curve, F6 Skytaper and Hyflex CM had significantly longer fatigue lives than Protaper Next X2 (p < 0.05). No statistically significant differences were found in the cyclic fatigue lives of One Curve, F6 Skytaper, and Hyflex CM (p > 0.05). SEM images of the fracture surfaces of the different instruments showed typical features of fatigue failure.ConclusionsWithin the conditions of this study, at 60° and with a 5 mm curvature radius, the cyclic fatigue life of One Curve was not significantly different from those of F6 Skytaper and Hyflex CM. The cyclic fatigue lives of these 3 instruments were statistically significantly longer than that of Protaper Next.http://www.rde.ac/upload/pdf/rde-47-e16.pdfcyclic fatiguescanning electron microscopyendodonticsnickel-titanium alloyrotary files |
| spellingShingle | Charlotte Gouédard Laurent Pino Reza Arbab-Chirani Shabnam Arbab-Chirani Valérie Chevalier Comparison of the cyclic fatigue resistance of One Curve, F6 Skytaper, Protaper Next, and Hyflex CM endodontic files Restorative Dentistry & Endodontics cyclic fatigue scanning electron microscopy endodontics nickel-titanium alloy rotary files |
| title | Comparison of the cyclic fatigue resistance of One Curve, F6 Skytaper, Protaper Next, and Hyflex CM endodontic files |
| title_full | Comparison of the cyclic fatigue resistance of One Curve, F6 Skytaper, Protaper Next, and Hyflex CM endodontic files |
| title_fullStr | Comparison of the cyclic fatigue resistance of One Curve, F6 Skytaper, Protaper Next, and Hyflex CM endodontic files |
| title_full_unstemmed | Comparison of the cyclic fatigue resistance of One Curve, F6 Skytaper, Protaper Next, and Hyflex CM endodontic files |
| title_short | Comparison of the cyclic fatigue resistance of One Curve, F6 Skytaper, Protaper Next, and Hyflex CM endodontic files |
| title_sort | comparison of the cyclic fatigue resistance of one curve f6 skytaper protaper next and hyflex cm endodontic files |
| topic | cyclic fatigue scanning electron microscopy endodontics nickel-titanium alloy rotary files |
| url | http://www.rde.ac/upload/pdf/rde-47-e16.pdf |
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