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Metallurgical characterization, galvanic corrosion, and ionic release of orthodontic brackets coupled with Ni-Ti archwires

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dc.contributor.author Darabara, MS en
dc.contributor.author Bourithis, LI en
dc.contributor.author Zinelis, S en
dc.contributor.author Papadimitriou, GD en
dc.date.accessioned 2014-03-01T01:26:37Z
dc.date.available 2014-03-01T01:26:37Z
dc.date.issued 2007 en
dc.identifier.issn 1552-4973 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/18158
dc.subject Corrosion en
dc.subject Orthodontic brackets en
dc.subject Orthodontic wires en
dc.subject.classification Engineering, Biomedical en
dc.subject.classification Materials Science, Biomaterials en
dc.subject.other Characterization en
dc.subject.other Chromium en
dc.subject.other Corrosion resistance en
dc.subject.other Galvanizing en
dc.subject.other Nickel alloys en
dc.subject.other Orthodontic brackets en
dc.subject.other Orthodontic wires en
dc.subject.other Metallurgy en
dc.subject.other acetic acid en
dc.subject.other alloy en
dc.subject.other chromium en
dc.subject.other ion en
dc.subject.other lactic acid en
dc.subject.other nickel en
dc.subject.other stainless steel en
dc.subject.other titanium en
dc.subject.other article en
dc.subject.other corrosion en
dc.subject.other exposure en
dc.subject.other hardness en
dc.subject.other measurement en
dc.subject.other metallurgy en
dc.subject.other mouth cavity en
dc.subject.other orthodontics en
dc.subject.other quantitative analysis en
dc.subject.other Copper en
dc.subject.other Corrosion en
dc.subject.other Electrogalvanism, Intraoral en
dc.subject.other Ions en
dc.subject.other Lactic Acid en
dc.subject.other Nickel en
dc.subject.other Orthodontic Wires en
dc.subject.other Titanium en
dc.title Metallurgical characterization, galvanic corrosion, and ionic release of orthodontic brackets coupled with Ni-Ti archwires en
heal.type journalArticle en
heal.identifier.primary 10.1002/jbm.b.30645 en
heal.identifier.secondary http://dx.doi.org/10.1002/jbm.b.30645 en
heal.language English en
heal.publicationDate 2007 en
heal.abstract In orthodontics, a combination of metallic alloys is placed into the oral cavity during medical treatment and thus the corrosion resistance and ionic release of these appliances is of vital importance. The aim of this study is to investigate the elemental composition, microstructure, hardness, corrosion properties, and ionic release of commercially available orthodontic brackets and Copper Ni-Ti archwires. Following the assessment of the elemental composition of the orthodontic wire (Copper Ni-Ti (TM)) and the six different brackets (Micro Loc, Equilibrium, OptiMESH(XRT), Gemini, Orthos2, and Rematitan), cyclic polarization curves were obtained for each material to estimate the susceptibility of each alloy to pitting corrosion in 1M lactic acid. Galvanic corrosion between the orthodontic wire and each bracket took place in 1M lactic acid for 28 days at 37 degrees C and then the ionic concentration of Nickel and Chromium was studied. The orthodontic wire is made up from a Ni-Ti alloy with copper additions, while the orthodontic brackets are manufactured by different stainless steel grades or titanium alloys. All tested wires and brackets with the exception of Gemini are not susceptible to pitting corrosion. In galvanic corrosion, following exposure for 28 days, the lowest potential difference (similar to 250 mV) appears for the orthodontic wire Copper Ni-Ti and the bracket made up from pure titanium (Rematitan) or from the stainless steel AISI 316 grade (Micro Loc). Following completion of the galvanic corrosion experiments, measurable quantities of chromium and nickel ions were found in the residual lactic acid solution. (c) 2006 Wiley Periodicals, Inc. en
heal.publisher WILEY-LISS en
heal.journalName Journal of Biomedical Materials Research - Part B Applied Biomaterials en
dc.identifier.doi 10.1002/jbm.b.30645 en
dc.identifier.isi ISI:000245140700015 en
dc.identifier.volume 81 en
dc.identifier.issue 1 en
dc.identifier.spage 126 en
dc.identifier.epage 134 en


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