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Influence of Continuous or Reciprocating Optimum Torque Reverse Motion on Cyclic Fatigue Resistance of Two Single-File Nickel-Titanium Rotary Instruments
OBJECTIVE: Different single-file instruments and kinematics have been introduced on the market. It is important to know the cyclic fatigue performance of these instruments in these new kinematics such as reciprocation of Optimum Torque Reverse (OTR) motion. The aim of this study was to evaluate the...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Kare Publishing
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7757954/ https://www.ncbi.nlm.nih.gov/pubmed/33403337 http://dx.doi.org/10.14744/eej.2017.17012 |
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author | Pedulla, Eugenio Corsentino, Giacomo Ambu, Emanuele Rovai, Fabio Campedelli, Federico Rapisarda, Silvia Rosa, Giusy LA Rapisarda, Ernesto Grandini, Simone |
author_facet | Pedulla, Eugenio Corsentino, Giacomo Ambu, Emanuele Rovai, Fabio Campedelli, Federico Rapisarda, Silvia Rosa, Giusy LA Rapisarda, Ernesto Grandini, Simone |
author_sort | Pedulla, Eugenio |
collection | PubMed |
description | OBJECTIVE: Different single-file instruments and kinematics have been introduced on the market. It is important to know the cyclic fatigue performance of these instruments in these new kinematics such as reciprocation of Optimum Torque Reverse (OTR) motion. The aim of this study was to evaluate the resistance to cyclic fatigue of F6 SkyTaper and OneShape used in continuous rotation (proper rotation) or in reciprocating OTR motion. METHODS: A total of forty-eight nickel-titanium files were tested. Twenty-four instruments of both brands were divided into two groups (n=12) on the basis of the motion tested: continuous rotation (group 1) or reciprocating OTR motion (group 2). Resistance to cyclic fatigue was determined by recording time to fracture (TtF) in a stainless steel artificial canal with a 60° angle of curvature and 5 mm radius of curvature. Data were analysed by two-way analysis of variance and post-hoc Bonferroni tests for multiple comparisons with P<0.05 as the level of significance. RESULTS: F6 SkyTaper showed higher TtF compared with OneShape, both in continuous and in OTR motion (P<0.0001). The two tested instruments showed higher cyclic fatigue resistance in reciprocating OTR motion than continuous rotation (P<0.0001). CONCLUSION: OTR motion significantly improves cyclic fatigue resistance of the tested instruments. In addition, F6 SkyTaper showed higher cyclic fatigue resistance than OneShape in both motions. |
format | Online Article Text |
id | pubmed-7757954 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Kare Publishing |
record_format | MEDLINE/PubMed |
spelling | pubmed-77579542021-01-04 Influence of Continuous or Reciprocating Optimum Torque Reverse Motion on Cyclic Fatigue Resistance of Two Single-File Nickel-Titanium Rotary Instruments Pedulla, Eugenio Corsentino, Giacomo Ambu, Emanuele Rovai, Fabio Campedelli, Federico Rapisarda, Silvia Rosa, Giusy LA Rapisarda, Ernesto Grandini, Simone Eur Endod J Original Article OBJECTIVE: Different single-file instruments and kinematics have been introduced on the market. It is important to know the cyclic fatigue performance of these instruments in these new kinematics such as reciprocation of Optimum Torque Reverse (OTR) motion. The aim of this study was to evaluate the resistance to cyclic fatigue of F6 SkyTaper and OneShape used in continuous rotation (proper rotation) or in reciprocating OTR motion. METHODS: A total of forty-eight nickel-titanium files were tested. Twenty-four instruments of both brands were divided into two groups (n=12) on the basis of the motion tested: continuous rotation (group 1) or reciprocating OTR motion (group 2). Resistance to cyclic fatigue was determined by recording time to fracture (TtF) in a stainless steel artificial canal with a 60° angle of curvature and 5 mm radius of curvature. Data were analysed by two-way analysis of variance and post-hoc Bonferroni tests for multiple comparisons with P<0.05 as the level of significance. RESULTS: F6 SkyTaper showed higher TtF compared with OneShape, both in continuous and in OTR motion (P<0.0001). The two tested instruments showed higher cyclic fatigue resistance in reciprocating OTR motion than continuous rotation (P<0.0001). CONCLUSION: OTR motion significantly improves cyclic fatigue resistance of the tested instruments. In addition, F6 SkyTaper showed higher cyclic fatigue resistance than OneShape in both motions. Kare Publishing 2017-08-22 /pmc/articles/PMC7757954/ /pubmed/33403337 http://dx.doi.org/10.14744/eej.2017.17012 Text en Copyright: © 2020 European Endodontic Journal http://creativecommons.org/licenses/by-nc/4.0 This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License |
spellingShingle | Original Article Pedulla, Eugenio Corsentino, Giacomo Ambu, Emanuele Rovai, Fabio Campedelli, Federico Rapisarda, Silvia Rosa, Giusy LA Rapisarda, Ernesto Grandini, Simone Influence of Continuous or Reciprocating Optimum Torque Reverse Motion on Cyclic Fatigue Resistance of Two Single-File Nickel-Titanium Rotary Instruments |
title | Influence of Continuous or Reciprocating Optimum Torque Reverse Motion on Cyclic Fatigue Resistance of Two Single-File Nickel-Titanium Rotary Instruments |
title_full | Influence of Continuous or Reciprocating Optimum Torque Reverse Motion on Cyclic Fatigue Resistance of Two Single-File Nickel-Titanium Rotary Instruments |
title_fullStr | Influence of Continuous or Reciprocating Optimum Torque Reverse Motion on Cyclic Fatigue Resistance of Two Single-File Nickel-Titanium Rotary Instruments |
title_full_unstemmed | Influence of Continuous or Reciprocating Optimum Torque Reverse Motion on Cyclic Fatigue Resistance of Two Single-File Nickel-Titanium Rotary Instruments |
title_short | Influence of Continuous or Reciprocating Optimum Torque Reverse Motion on Cyclic Fatigue Resistance of Two Single-File Nickel-Titanium Rotary Instruments |
title_sort | influence of continuous or reciprocating optimum torque reverse motion on cyclic fatigue resistance of two single-file nickel-titanium rotary instruments |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7757954/ https://www.ncbi.nlm.nih.gov/pubmed/33403337 http://dx.doi.org/10.14744/eej.2017.17012 |
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