Influence of topographical feature on the fluoride corrosión of Ni-Ti orthodontic archwires
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hdl:2117/15162
Tipus de documentArticle
Data publicació2011
EditorSpringer
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Abstract
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.
CitacióAbalos, C. [et al.]. Influence of topographical feature on the fluoride corrosión of Ni-Ti orthodontic archwires. "Journal of Materials Science: Materials in Medicine", 2011, núm. 22, p. 2813-2821.
ISSN1573-4838
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