Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Investigation of Antibacterial Properties of TiN-Cu Nanocoated Nitinol Archwires

Bojana Ilić
* ORCID logo ,
Božana Petrović
ORCID logo ,
Jelena Marinković
,
Jadranka Miletić Vukajlović
,
Momir Stevanović
ORCID logo ,
Jelena Potočnik
,
Vukoman Jokanović
Version 1 : Received: 15 August 2023 / Approved: 16 August 2023 / Online: 16 August 2023 (10:45:25 CEST)

A peer-reviewed article of this Preprint also exists.

Ilić, B.; Petrović, B.; Marinković, J.; Miletić Vukajlović, J.; Stevanović, M.; Potočnik, J.; Jokanović, V. Investigation of Ion Release and Antibacterial Properties of TiN-Cu-Nanocoated Nitinol Archwires. Coatings 2023, 13, 1587. Ilić, B.; Petrović, B.; Marinković, J.; Miletić Vukajlović, J.; Stevanović, M.; Potočnik, J.; Jokanović, V. Investigation of Ion Release and Antibacterial Properties of TiN-Cu-Nanocoated Nitinol Archwires. Coatings 2023, 13, 1587.

Abstract

Background: The use of nitinol (NiTi) archwires in orthodontic treatment has expanded significantly due to unique mechanical properties. The greatest barrier to safe orthodontic treatment is chemically or microbiologically induced corrosion, resulting in Ni2+ release. The aim of this investigation was to enhance corrosion resistance and introduction antibacterial properties to NiTi archwire by coating them with TiN-Cu. Methods: NiTi archwires were coated with TiN-Cu using cathodic arc evaporation and direct current magnetron sputtering. The morphology of the sample was analyzed by FESEM and the chemical composition was assessed using EDS, XRD and FTIR. Inductively coupled plasma-optical emission spectrometry was used to estimate the ion release. Biocompatibility of samples was investigated using MTT test. Antibacterial activity was analyzed against Streptococcus mutans and Streptococcus mitis. Results: Physico-chemical characterization revealed well-designed coatings with the presence of TiN phase with incorporated Cu2+. TiN-Cu coated archwires showed statistically lower Ni2+ release (p<0.05). Relative cell viability was the highest regarding 28-day eluates of TiN-Cu coated archwires (p<0.05). The most remarkable decrease in Streptococcus mitis concentrations was observed in case of TiN-Cu coated archwires (p<0.05). Conclusion: Taking into account biocompatibility and antibacterial tests, TiN-Cu coated archwires may be considered as a good candidate further clinical investigations.

Keywords

antibacterial activity; orthodontic archwires; Streptococcus mutans; nanocoatings

Subject

Chemistry and Materials Science, Surfaces, Coatings and Films

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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