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

Darabara, MS; Bourithis, LI; Zinelis, S; Papadimitriou, GD

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