Cargando…
Cyclic fatigue resistance, torsional resistance, and metallurgical characteristics of M3 Rotary and M3 Pro Gold NiTi files
OBJECTIVES: To evaluate the mechanical properties and metallurgical characteristics of the M3 Rotary and M3 Pro Gold files (United Dental). MATERIALS AND METHODS: One 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...
Autores principales: | , , , , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Korean Academy of Conservative Dentistry
2018
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5952062/ https://www.ncbi.nlm.nih.gov/pubmed/29765904 http://dx.doi.org/10.5395/rde.2018.43.e25 |
_version_ | 1783323122313723904 |
---|---|
author | Pedullà, Eugenio Lo Savio, Fabio La Rosa, Giusy Rita Maria Miccoli, Gabriele Bruno, Elena Rapisarda, Silvia Chang, Seok Woo Rapisarda, Ernesto La Rosa, Guido Gambarini, Gianluca Testarelli, Luca |
author_facet | Pedullà, Eugenio Lo Savio, Fabio La Rosa, Giusy Rita Maria Miccoli, Gabriele Bruno, Elena Rapisarda, Silvia Chang, Seok Woo Rapisarda, Ernesto La Rosa, Guido Gambarini, Gianluca Testarelli, Luca |
author_sort | Pedullà, Eugenio |
collection | PubMed |
description | OBJECTIVES: To evaluate the mechanical properties and metallurgical characteristics of the M3 Rotary and M3 Pro Gold files (United Dental). MATERIALS AND METHODS: One 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. RESULTS: Comparing 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. CONCLUSIONS: The 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 | Online Article Text |
id | pubmed-5952062 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | The Korean Academy of Conservative Dentistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-59520622018-05-15 Cyclic fatigue resistance, torsional resistance, and metallurgical characteristics of M3 Rotary and M3 Pro Gold NiTi files Pedullà, Eugenio Lo Savio, Fabio La Rosa, Giusy Rita Maria Miccoli, Gabriele Bruno, Elena Rapisarda, Silvia Chang, Seok Woo Rapisarda, Ernesto La Rosa, Guido Gambarini, Gianluca Testarelli, Luca Restor Dent Endod Research Article OBJECTIVES: To evaluate the mechanical properties and metallurgical characteristics of the M3 Rotary and M3 Pro Gold files (United Dental). MATERIALS AND METHODS: One 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. RESULTS: Comparing 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. CONCLUSIONS: The 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. The Korean Academy of Conservative Dentistry 2018-04-23 /pmc/articles/PMC5952062/ /pubmed/29765904 http://dx.doi.org/10.5395/rde.2018.43.e25 Text en Copyright © 2018. The Korean Academy of Conservative Dentistry https://creativecommons.org/licenses/by-nc/4.0/ 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. |
spellingShingle | Research Article Pedullà, Eugenio Lo Savio, Fabio La Rosa, Giusy Rita Maria Miccoli, Gabriele Bruno, Elena Rapisarda, Silvia Chang, Seok Woo Rapisarda, Ernesto La Rosa, Guido Gambarini, Gianluca Testarelli, Luca Cyclic fatigue resistance, torsional resistance, and metallurgical characteristics of M3 Rotary and M3 Pro Gold NiTi files |
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 | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5952062/ https://www.ncbi.nlm.nih.gov/pubmed/29765904 http://dx.doi.org/10.5395/rde.2018.43.e25 |
work_keys_str_mv | AT pedullaeugenio cyclicfatigueresistancetorsionalresistanceandmetallurgicalcharacteristicsofm3rotaryandm3progoldnitifiles AT losaviofabio cyclicfatigueresistancetorsionalresistanceandmetallurgicalcharacteristicsofm3rotaryandm3progoldnitifiles AT larosagiusyritamaria cyclicfatigueresistancetorsionalresistanceandmetallurgicalcharacteristicsofm3rotaryandm3progoldnitifiles AT miccoligabriele cyclicfatigueresistancetorsionalresistanceandmetallurgicalcharacteristicsofm3rotaryandm3progoldnitifiles AT brunoelena cyclicfatigueresistancetorsionalresistanceandmetallurgicalcharacteristicsofm3rotaryandm3progoldnitifiles AT rapisardasilvia cyclicfatigueresistancetorsionalresistanceandmetallurgicalcharacteristicsofm3rotaryandm3progoldnitifiles AT changseokwoo cyclicfatigueresistancetorsionalresistanceandmetallurgicalcharacteristicsofm3rotaryandm3progoldnitifiles AT rapisardaernesto cyclicfatigueresistancetorsionalresistanceandmetallurgicalcharacteristicsofm3rotaryandm3progoldnitifiles AT larosaguido cyclicfatigueresistancetorsionalresistanceandmetallurgicalcharacteristicsofm3rotaryandm3progoldnitifiles AT gambarinigianluca cyclicfatigueresistancetorsionalresistanceandmetallurgicalcharacteristicsofm3rotaryandm3progoldnitifiles AT testarelliluca cyclicfatigueresistancetorsionalresistanceandmetallurgicalcharacteristicsofm3rotaryandm3progoldnitifiles |