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Welding strength of NiTi wires

OBJECTIVE: To identify the appropriate power level for electric welding of three commercial brands of nickel-titanium (NiTi) wires. METHODS: Ninety pairs of 0.018-in and 0.017 × 0.025-in NiTi wires were divided into three groups according to their manufacturers - GI (Orthometric, Marília, Brazil), G...

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Detalles Bibliográficos
Autores principales: Mesquita, Tatyane Ribeiro, Martins, Lídia Parsekian, Martins, Renato Parsekian
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Dental Press International 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6072447/
https://www.ncbi.nlm.nih.gov/pubmed/30088566
http://dx.doi.org/10.1590/2177-6709.22.3.058-062.oar
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author Mesquita, Tatyane Ribeiro
Martins, Lídia Parsekian
Martins, Renato Parsekian
author_facet Mesquita, Tatyane Ribeiro
Martins, Lídia Parsekian
Martins, Renato Parsekian
author_sort Mesquita, Tatyane Ribeiro
collection PubMed
description OBJECTIVE: To identify the appropriate power level for electric welding of three commercial brands of nickel-titanium (NiTi) wires. METHODS: Ninety pairs of 0.018-in and 0.017 × 0.025-in NiTi wires were divided into three groups according to their manufacturers - GI (Orthometric, Marília, Brazil), GII (3M OralCare, St. Paul, CA) and GIII (GAC,York, PA) - and welded by electrical resistance. Each group was divided into subgroups of 5 pairs of wires, in which welding was done with different power levels. In GI and GII, power levels of 2.5, 3, 3.5, 4, 4.5 and 5 were used, while in GIII 2.5, 3, 3.5 and 4 were used (each unit of power of the welding machine representing 500W). The pairs of welded wires underwent a tensile strength test on an universal testing machine until rupture and the maximum forces were recorded. Analysis of variance (ANOVA) and post-hoc tests were conducted to determine which subgroup within each brand group had the greatest resistance to rupture. RESULTS: The 2.5 power exhibited the lowest resistance to rupture in all groups (43.75N for GI, 28.41N for GII and 47.57N for GIII) while the 4.0 power provided the highest resistance in GI and GII (97.90N and 99.61N, respectively), while in GIII (79.28N) the highest resistance was achieved with a 3.5 power welding. CONCLUSIONS: The most appropriate power for welding varied for each brand, being 4.0 for Orthometric and 3M, and 3.5 for GAC NiTi wires.
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spelling pubmed-60724472018-08-06 Welding strength of NiTi wires Mesquita, Tatyane Ribeiro Martins, Lídia Parsekian Martins, Renato Parsekian Dental Press J Orthod Original Article OBJECTIVE: To identify the appropriate power level for electric welding of three commercial brands of nickel-titanium (NiTi) wires. METHODS: Ninety pairs of 0.018-in and 0.017 × 0.025-in NiTi wires were divided into three groups according to their manufacturers - GI (Orthometric, Marília, Brazil), GII (3M OralCare, St. Paul, CA) and GIII (GAC,York, PA) - and welded by electrical resistance. Each group was divided into subgroups of 5 pairs of wires, in which welding was done with different power levels. In GI and GII, power levels of 2.5, 3, 3.5, 4, 4.5 and 5 were used, while in GIII 2.5, 3, 3.5 and 4 were used (each unit of power of the welding machine representing 500W). The pairs of welded wires underwent a tensile strength test on an universal testing machine until rupture and the maximum forces were recorded. Analysis of variance (ANOVA) and post-hoc tests were conducted to determine which subgroup within each brand group had the greatest resistance to rupture. RESULTS: The 2.5 power exhibited the lowest resistance to rupture in all groups (43.75N for GI, 28.41N for GII and 47.57N for GIII) while the 4.0 power provided the highest resistance in GI and GII (97.90N and 99.61N, respectively), while in GIII (79.28N) the highest resistance was achieved with a 3.5 power welding. CONCLUSIONS: The most appropriate power for welding varied for each brand, being 4.0 for Orthometric and 3M, and 3.5 for GAC NiTi wires. Dental Press International 2018 /pmc/articles/PMC6072447/ /pubmed/30088566 http://dx.doi.org/10.1590/2177-6709.22.3.058-062.oar Text en https://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License
spellingShingle Original Article
Mesquita, Tatyane Ribeiro
Martins, Lídia Parsekian
Martins, Renato Parsekian
Welding strength of NiTi wires
title Welding strength of NiTi wires
title_full Welding strength of NiTi wires
title_fullStr Welding strength of NiTi wires
title_full_unstemmed Welding strength of NiTi wires
title_short Welding strength of NiTi wires
title_sort welding strength of niti wires
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6072447/
https://www.ncbi.nlm.nih.gov/pubmed/30088566
http://dx.doi.org/10.1590/2177-6709.22.3.058-062.oar
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