Cyclic fatigue resistance, torsional resistance, and metallurgical characteristics of M3 Rotary and M3 Pro Gold NiTi files
ObjectivesTo evaluate the mechanical properties and metallurgical characteristics of the M3 Rotary and M3 Pro Gold files (United Dental).Materials and MethodsOne hundred and sixty new M3 Rotary and M3 Pro Gold files (sizes 20/0.04 and 25/0.04) were used. Torque and angle of rotation at failure (n =...
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Korean Academy of Conservative Dentistry
2018-05-01
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| Series: | Restorative Dentistry & Endodontics |
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| Online Access: | http://rde.ac/upload/pdf/rde-43-e25.pdf |
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| author | Eugenio Pedullà Fabio Lo Savio Giusy Rita Maria La Rosa Gabriele Miccoli Elena Bruno Silvia Rapisarda Seok Woo Chang Ernesto Rapisarda Guido La Rosa Gianluca Gambarini Luca Testarelli |
| author_facet | Eugenio Pedullà Fabio Lo Savio Giusy Rita Maria La Rosa Gabriele Miccoli Elena Bruno Silvia Rapisarda Seok Woo Chang Ernesto Rapisarda Guido La Rosa Gianluca Gambarini Luca Testarelli |
| author_sort | Eugenio Pedullà |
| collection | DOAJ |
| description | ObjectivesTo evaluate the mechanical properties and metallurgical characteristics of the M3 Rotary and M3 Pro Gold files (United Dental).Materials and MethodsOne hundred and sixty new M3 Rotary and M3 Pro Gold files (sizes 20/0.04 and 25/0.04) were used. Torque and angle of rotation at failure (n = 20) were measured according to ISO 3630-1. Cyclic fatigue resistance was tested by measuring the number of cycles to failure in an artificial stainless steel canal (60° angle of curvature and a 5-mm radius). The metallurgical characteristics were investigated by differential scanning calorimetry. Data were analyzed using analysis of variance and the Student-Newman-Keuls test.ResultsComparing the same size of the 2 different instruments, cyclic fatigue resistance was significantly higher in the M3 Pro Gold files than in the M3 Rotary files (p < 0.001). No significant difference was observed between the files in the maximum torque load, while a significantly higher angular rotation to fracture was observed for M3 Pro Gold (p < 0.05). In the DSC analysis, the M3 Pro Gold files showed one prominent peak on the heating curve and 2 prominent peaks on the cooling curve. In contrast, the M3 Rotary files showed 1 small peak on the heating curve and 1 small peak on the cooling curve.ConclusionsThe M3 Pro Gold files showed greater flexibility and angular rotation than the M3 Rotary files, without decrement of their torque resistance. The superior flexibility of M3 Pro Gold files can be attributed to their martensite phase. |
| format | Article |
| id | doaj-art-a278d42181a04c0ca9defc6063cea5e5 |
| institution | DOAJ |
| issn | 2234-7658 2234-7666 |
| language | English |
| publishDate | 2018-05-01 |
| publisher | Korean Academy of Conservative Dentistry |
| record_format | Article |
| series | Restorative Dentistry & Endodontics |
| spelling | doaj-art-a278d42181a04c0ca9defc6063cea5e52025-08-20T02:42:12ZengKorean Academy of Conservative DentistryRestorative Dentistry & Endodontics2234-76582234-76662018-05-01432e2510.5395/rde.2018.43.e25815Cyclic fatigue resistance, torsional resistance, and metallurgical characteristics of M3 Rotary and M3 Pro Gold NiTi filesEugenio Pedullà0Fabio Lo Savio1Giusy Rita Maria La Rosa2Gabriele Miccoli3Elena Bruno4Silvia Rapisarda5Seok Woo Chang6Ernesto Rapisarda7Guido La Rosa8Gianluca Gambarini9Luca Testarelli10Department of General Surgery and Surgical-Medical Specialties, University of Catania, Catania, ItalyIndustrial Engineering, University of Catania, Catania, ItalyDepartment of General Surgery and Surgical-Medical Specialties, University of Catania, Catania, ItalyDepartment of Endodontics, La Sapienza University, Rome, ItalyMATIS IMM-CNR and Department of Physics, University of Catania, Catania, ItalyDepartment of General Surgery and Surgical-Medical Specialties, University of Catania, Catania, ItalyDepartment of Conservative Dentistry, School of Dentistry, Kyung Hee University, Seoul, KoreaDepartment of General Surgery and Surgical-Medical Specialties, University of Catania, Catania, ItalyIndustrial Engineering, University of Catania, Catania, ItalyDepartment of Endodontics, La Sapienza University, Rome, ItalyDepartment of Endodontics, La Sapienza University, Rome, ItalyObjectivesTo evaluate the mechanical properties and metallurgical characteristics of the M3 Rotary and M3 Pro Gold files (United Dental).Materials and MethodsOne hundred and sixty new M3 Rotary and M3 Pro Gold files (sizes 20/0.04 and 25/0.04) were used. Torque and angle of rotation at failure (n = 20) were measured according to ISO 3630-1. Cyclic fatigue resistance was tested by measuring the number of cycles to failure in an artificial stainless steel canal (60° angle of curvature and a 5-mm radius). The metallurgical characteristics were investigated by differential scanning calorimetry. Data were analyzed using analysis of variance and the Student-Newman-Keuls test.ResultsComparing the same size of the 2 different instruments, cyclic fatigue resistance was significantly higher in the M3 Pro Gold files than in the M3 Rotary files (p < 0.001). No significant difference was observed between the files in the maximum torque load, while a significantly higher angular rotation to fracture was observed for M3 Pro Gold (p < 0.05). In the DSC analysis, the M3 Pro Gold files showed one prominent peak on the heating curve and 2 prominent peaks on the cooling curve. In contrast, the M3 Rotary files showed 1 small peak on the heating curve and 1 small peak on the cooling curve.ConclusionsThe M3 Pro Gold files showed greater flexibility and angular rotation than the M3 Rotary files, without decrement of their torque resistance. The superior flexibility of M3 Pro Gold files can be attributed to their martensite phase.http://rde.ac/upload/pdf/rde-43-e25.pdfcyclic fatiguedifferential scanning calorimeterheat-treatmentm3 pro goldm3 rotarytorsional resistance |
| spellingShingle | Eugenio Pedullà Fabio Lo Savio Giusy Rita Maria La Rosa Gabriele Miccoli Elena Bruno Silvia Rapisarda Seok Woo Chang Ernesto Rapisarda Guido La Rosa Gianluca Gambarini Luca Testarelli Cyclic fatigue resistance, torsional resistance, and metallurgical characteristics of M3 Rotary and M3 Pro Gold NiTi files Restorative Dentistry & Endodontics cyclic fatigue differential scanning calorimeter heat-treatment m3 pro gold m3 rotary torsional resistance |
| title | Cyclic fatigue resistance, torsional resistance, and metallurgical characteristics of M3 Rotary and M3 Pro Gold NiTi files |
| title_full | Cyclic fatigue resistance, torsional resistance, and metallurgical characteristics of M3 Rotary and M3 Pro Gold NiTi files |
| title_fullStr | Cyclic fatigue resistance, torsional resistance, and metallurgical characteristics of M3 Rotary and M3 Pro Gold NiTi files |
| title_full_unstemmed | Cyclic fatigue resistance, torsional resistance, and metallurgical characteristics of M3 Rotary and M3 Pro Gold NiTi files |
| title_short | Cyclic fatigue resistance, torsional resistance, and metallurgical characteristics of M3 Rotary and M3 Pro Gold NiTi files |
| title_sort | cyclic fatigue resistance torsional resistance and metallurgical characteristics of m3 rotary and m3 pro gold niti files |
| topic | cyclic fatigue differential scanning calorimeter heat-treatment m3 pro gold m3 rotary torsional resistance |
| url | http://rde.ac/upload/pdf/rde-43-e25.pdf |
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