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Torsional Behavior of WaveOne Gold Endodontic File with the Dedicated Motor of the Original WaveOne File

This study compares the safety limits and torsional resistances of WaveOne Gold (WOG) and WaveOne (WO) endodontic files while using the original motor. The safety limits for reciprocating angles were tested by measuring the torsional limit before plastic deformation (TLP) after repetitive torsional...

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Autores principales: Ha, Jung-Hong, Sigurdsson, Asgeir, De-Deus, Gustavo, Versluis, Antheunis, Kwak, Sang Won, Kim, Hyeon-Cheol
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6073585/
https://www.ncbi.nlm.nih.gov/pubmed/29986392
http://dx.doi.org/10.3390/ma11071150
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author Ha, Jung-Hong
Sigurdsson, Asgeir
De-Deus, Gustavo
Versluis, Antheunis
Kwak, Sang Won
Kim, Hyeon-Cheol
author_facet Ha, Jung-Hong
Sigurdsson, Asgeir
De-Deus, Gustavo
Versluis, Antheunis
Kwak, Sang Won
Kim, Hyeon-Cheol
author_sort Ha, Jung-Hong
collection PubMed
description This study compares the safety limits and torsional resistances of WaveOne Gold (WOG) and WaveOne (WO) endodontic files while using the original motor. The safety limits for reciprocating angles were tested by measuring the torsional limit before plastic deformation (TLP) after repetitive torsional loading at gradually increasing load, and after single continuous rotation. Statistical analysis was performed by independent t-test at 95% confidence level. The tested specimens were observed under a scanning electron microscope (SEM). Regardless of the test mode, the distortion angle at the TLP was higher for WOG than WO (p < 0.05), and all were greater than the 150-degree rotation of the original motor. The mean values of the distortion angle and torque from the single continuous rotation loading were significantly lower than those with repetitive loading movements. Comparing the two systems under SEM, WO showed a catastrophic change in comparison with WOG. Evaluation of the lateral aspects showed longitudinal micro-cracks after 270-degree repetitive movements. After 150-degree repetitive movements, no distorted machining grooves were found in either group, but WO showed evidence of longitudinal micro-cracks. Under the conditions of this study, the torsional loading from the pre-set mode of the dedicated motor for WO was safe for WOG as well.
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spelling pubmed-60735852018-08-13 Torsional Behavior of WaveOne Gold Endodontic File with the Dedicated Motor of the Original WaveOne File Ha, Jung-Hong Sigurdsson, Asgeir De-Deus, Gustavo Versluis, Antheunis Kwak, Sang Won Kim, Hyeon-Cheol Materials (Basel) Article This study compares the safety limits and torsional resistances of WaveOne Gold (WOG) and WaveOne (WO) endodontic files while using the original motor. The safety limits for reciprocating angles were tested by measuring the torsional limit before plastic deformation (TLP) after repetitive torsional loading at gradually increasing load, and after single continuous rotation. Statistical analysis was performed by independent t-test at 95% confidence level. The tested specimens were observed under a scanning electron microscope (SEM). Regardless of the test mode, the distortion angle at the TLP was higher for WOG than WO (p < 0.05), and all were greater than the 150-degree rotation of the original motor. The mean values of the distortion angle and torque from the single continuous rotation loading were significantly lower than those with repetitive loading movements. Comparing the two systems under SEM, WO showed a catastrophic change in comparison with WOG. Evaluation of the lateral aspects showed longitudinal micro-cracks after 270-degree repetitive movements. After 150-degree repetitive movements, no distorted machining grooves were found in either group, but WO showed evidence of longitudinal micro-cracks. Under the conditions of this study, the torsional loading from the pre-set mode of the dedicated motor for WO was safe for WOG as well. MDPI 2018-07-06 /pmc/articles/PMC6073585/ /pubmed/29986392 http://dx.doi.org/10.3390/ma11071150 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ha, Jung-Hong
Sigurdsson, Asgeir
De-Deus, Gustavo
Versluis, Antheunis
Kwak, Sang Won
Kim, Hyeon-Cheol
Torsional Behavior of WaveOne Gold Endodontic File with the Dedicated Motor of the Original WaveOne File
title Torsional Behavior of WaveOne Gold Endodontic File with the Dedicated Motor of the Original WaveOne File
title_full Torsional Behavior of WaveOne Gold Endodontic File with the Dedicated Motor of the Original WaveOne File
title_fullStr Torsional Behavior of WaveOne Gold Endodontic File with the Dedicated Motor of the Original WaveOne File
title_full_unstemmed Torsional Behavior of WaveOne Gold Endodontic File with the Dedicated Motor of the Original WaveOne File
title_short Torsional Behavior of WaveOne Gold Endodontic File with the Dedicated Motor of the Original WaveOne File
title_sort torsional behavior of waveone gold endodontic file with the dedicated motor of the original waveone file
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6073585/
https://www.ncbi.nlm.nih.gov/pubmed/29986392
http://dx.doi.org/10.3390/ma11071150
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