Comparative assessment of the corrosion process of orthodontic archwires made of stainless steel, titanium–molybdenum and nickel–titanium alloys

Konrad Małkiewicz , Mariola Sztogryn , Marcin Mikulewicz , Andrzej Wielgus , Janusz Kamiński , Tadeusz Wierzchoń


The phenomenon of corrosion of orthodontic appliances is of interest to both clinicians and researchers dealing with the issue of biocompatibility of medical materials. The oral cavity, due to its temperature fluctuations, changing pH, high humidity, action of mechanical forces and the presence of microorganisms is a favorable environment for degradation of dental materials. This article presents the comparative assessment of the intensity of corrosion of orthodontic archwires made of alloy steel, nickel–titanium and titanium–molybdenum alloys in laboratory conditions. Corrosion resistance examinations were carried out by means of the impedance and the potentiodynamic methods using an Autolab PGSTAT100 potentiostat/galwanostat (Eco Chemie B.V., Holand) with FRA2 module, in non-deaerated artificial saliva solution at 37 °C. An analysis of the impendence method's data showing that the highest corrosion resistance is observed for NiTi arches (3M, USA), while the lowest resistance for SS arches (3M, USA). These observations were confirmed by the data obtained from potentiodynamic tests; it was observed that the average corrosion current density [Icor] was the lowest for nickel–titanium archwires (3M, USA) and averaged 2.50 × 10‒3 µA/cm2. The highest Icor corrosion current was observed in the case of steel wires from the same manufacturer and averaged 4.96 × 10-2 µA/cm2.
Author Konrad Małkiewicz
Konrad Małkiewicz,,
, Mariola Sztogryn
Mariola Sztogryn,,
, Marcin Mikulewicz
Marcin Mikulewicz,,
, Andrzej Wielgus (FEIT / MO)
Andrzej Wielgus,,
- The Institute of Microelectronics and Optoelectronics
, Janusz Kamiński (FMSE / DSE)
Janusz Kamiński,,
- Division of Surface Engineering
, Tadeusz Wierzchoń (FMSE / DSE)
Tadeusz Wierzchoń,,
- Division of Surface Engineering
Journal seriesArchives of Civil and Mechanical Engineering, ISSN 1644-9665, (A 30 pkt)
Issue year2018
Publication size in sheets0.5
Keywords in EnglishOrthodontic wires, Corrosion, Nickel–titanium, β-Titanium, Stainless steel
ASJC Classification2210 Mechanical Engineering; 2205 Civil and Structural Engineering
Languageen angielski
1-s2.0-S1644966518300177-main (1).pdf 1.07 MB
Score (nominal)30
ScoreMinisterial score = 30.0, 11-03-2019, ArticleFromJournal
Ministerial score (2013-2016) = 30.0, 11-03-2019, ArticleFromJournal
Publication indicators Scopus SNIP (Source Normalised Impact per Paper): 2016 = 1.935; WoS Impact Factor: 2017 = 2.763 (2) - 2017=2.562 (5)
Citation count*1 (2019-04-11)
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