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Susceptibility to Corrosion and In Vitro Biocompatibility of a Laser-Welded Composite Orthodontic Arch Wire

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Abstract

Composite arch-wire (CoAW) is an arch wire formed by solder connection of nickel titanium shape memory alloy and stainless steel wire. The purpose of the present study was to investigate the biocompatibility of CoAW as an important foundation for its clinical application. The electrochemical corrosion and ion release behavior of CoAW upon immersion in solutions simulating oral cavity conditions were measured to evaluate the corrosion behavior of CoAW. Murine L-929 cells were co-cultured with CoAW extract to evaluate the cytotoxicity of the corrosion products in vitro. Polarization tests indicated that CoAW is resistant to corrosion in the tested artificial saliva (AS)-based solutions (chloric solution, simple AS, fluorinated AS, and protein-containing AS), and the amount of toxic copper ions released after immersion was lower than average daily dietary intake levels. The cytotoxicity experiments demonstrated the in vitro biocompatibility of CoAW. Based on the combined advantages of its base materials CoAW, with its resistance to biocorrosion and in vitro cytocompatibility, is a promising alternative material for use in orthodontic fixation applications.

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Conflicts of interest

All authors and co-authors here declare there is no potential conflict of interest.

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Authors and Affiliations

  1. Department of Orthodontics, Jilin University, No. 1500 Qinghua Road, Changchun, 130021, People’s Republic of China

    Chao Zhang, Xinhua Sun & Wenwen Yu

  2. Department of Prosthodontics, Stomatology Hospital of Guangzhou Medical University, No. 39 Huangsha Road, Guangzhou, 510140, People’s Republic of China

    Shuang Zhao

  3. Key Laboratory of Automobile Materials, Ministry of Education, Department of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun, 130025, People’s Republic of China

    Daqian Sun

Authors
  1. Chao Zhang
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  2. Xinhua Sun
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  3. Shuang Zhao
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  4. Wenwen Yu
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Correspondence to Xinhua Sun.

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Associate Editor Eiji Tanaka oversaw the review of this article.

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Zhang, C., Sun, X., Zhao, S. et al. Susceptibility to Corrosion and In Vitro Biocompatibility of a Laser-Welded Composite Orthodontic Arch Wire. Ann Biomed Eng 42, 222–230 (2014). https://doi.org/10.1007/s10439-013-0885-4

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  • DOI: https://doi.org/10.1007/s10439-013-0885-4

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