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Joining characteristics of titanium-based orthodontic wires connected by laser and electrical welding methods

  • Clinical Applications of Biomaterials
  • Published:
Journal of Materials Science: Materials in Medicine Aims and scope Submit manuscript

Abstract

This study investigated the possibility of electrical and laser welding to connect titanium-based alloy (beta-titanium and nickel-titanium) wires and stainless-steel or cobalt-chromium alloy wires for fabrication of combination arch-wires. Four kinds of straight orthodontic rectangular wires (0.017 × 0.025 inch) were used: stainless-steel (S-S), cobalt-chromium (Co-Cr), beta-titanium alloy (β-Ti), and nickel-titanium (Ni-Ti). Homogeneous and heterogeneous end-to-end joints (15 mm long each) were made by electrical welding and laser welding. Non-welded wires (30 mm long) were also used as a control. Maximum loads at fracture (N) and elongation (%) were measured by conducting tensile test. The data (n = 10) were statistically analyzed using analysis of variance/Tukey test (P < 0.05).The S-S/S-S and Co-Cr/Co-Cr specimens showed significantly higher values of the maximum load (ML) at fracture and elongation (EL) than those of the Ni-Ti/Ni-Ti and β-Ti/β-Ti specimens for electrical welding and those of the S-S/S-S and Co-Cr/Co-Cr specimens welded by laser. On the other hand, the laser-welded Ni-Ti/Ni-Ti and β-Ti/β-Ti specimens exhibited higher values of the ML and EL compared to those of the corresponding specimens welded by electrical method. In the heterogeneously welded combinations, the electrically welded Ni-Ti/S-S, β-Ti/S-S and β-Ti/Co-Cr specimens showed significantly (P < 0.05) higher ML and EL than those of the corresponding specimens welded by laser. Electrical welding exhibited the higher values of maximum load at fracture and elongation for heterogeneously welded combinations than laser-welding.

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Acknowledgments

This study was partially supported by a Grant MEXT KAKENHI Grant No. 23659905.

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Authors and Affiliations

  1. Department of Orthodontics and Dentofacial Orthopedics, Nagasaki University Graduate School of Biomedical Sciences, 1-7-1 Sakamoto, Nagasaki, 852-8588, Japan

    Junko Matsunaga, Noriko Nakao & Noriaki Yoshida

  2. Department of Dental and Biomedical Materials Science, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, 1-7-1 Sakamoto, Nagasaki, 852-8588, Japan

    Ikuya Watanabe & Etsuko Watanabe

  3. Department of Conservative Dentistry, Faculty of Dentistry, Tanta University, El Guish St, Tanta, Egypt

    Waleed Elshahawy

Authors
  1. Junko Matsunaga
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  2. Ikuya Watanabe
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  3. Noriko Nakao
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  4. Etsuko Watanabe
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  5. Waleed Elshahawy
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  6. Noriaki Yoshida
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Correspondence to Ikuya Watanabe.

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Matsunaga, J., Watanabe, I., Nakao, N. et al. Joining characteristics of titanium-based orthodontic wires connected by laser and electrical welding methods. J Mater Sci: Mater Med 26, 50 (2015). https://doi.org/10.1007/s10856-015-5391-9

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  • DOI: https://doi.org/10.1007/s10856-015-5391-9

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