Title:
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Influence of topographical feature on the fluoride corrosión of Ni-Ti orthodontic archwires
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Author:
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Abalos, C.; Paúl, A.; Mendoza, A.; Solano, E.; Gil Mur, Francisco Javier
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. BBT - Biomaterials, Biomecànica i Enginyeria de Teixits |
Abstract:
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Different manufacturing processes of Ni–Ti
archwires respond differently to corrosion due to the surface
conditions involved. In this study, several topographical
features and their influence upon fluoride corrosion were
studied. Four topographies (smooth, dimple, scratch, and
crack) according to the main surface defect were characterized
(n = 40). Static corrosion tests were performed in artificial
saliva with fluorated prophylactic gel (12500 ppm) for
28 days. The surface was characterized by SEM and laser
confocal microscopy. Standard electrochemical corrosion
(open circuit potential, corrosion potential and corrosion
current density) was performed. Statistical analysis was carried
out using the ANOVA test (a B 0.05). An increase was
observed in the surface defects and/or roughness of the
cracked and scratched surfaces. These defects produced an
important increase in corrosion behavior. The best surfaces
for the orthodontic archwires were the smooth and dimpled
surfaces, respectively. The increase in defects was independent
of roughness. Manufacturing processes that produce
surface cracks should be avoided in orthodontic applications. |
Abstract:
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Peer Reviewed |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria dels materials -Orthodontics -Nickel-titanium alloys -Fluorides -Ortodòncia -Níquel-titani -- Aliatges -Fluorurs |
Rights:
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Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/ |
Document type:
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Article - Published version Article |
Published by:
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Springer
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