• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Study on joining of orthodontic titanium-based materials using laser-welding

Research Project

Project/Area Number 17592145
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Orthodontic/Pediatric dentistry
Research InstitutionHealth Sciences University of Hokkaido

Principal Investigator

IIJIMA Masahiro  Health Sciences University of Hokkaido, Department of Orthodontics, Associate Professor, 歯学部, 准教授 (20305915)

Co-Investigator(Kenkyū-buntansha) MIZOGUCHI Itaru  Health Sciences University of Hokkaido, Department of Orthodontics, Professor, 歯学部, 教授 (20200032)
Project Period (FY) 2005 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2006: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2005: ¥2,900,000 (Direct Cost: ¥2,900,000)
Keywordsarchwire / be ta-Ti / Ni-Ti / laser-welding / Micro-XRD / tension test
Research Abstract

Laser welding 0.016×0.022 inch beta-Ti, Ni-Ti and Co-Cr-Ni orthodontic wires was investigated by measuring joint tensile strength, measuring laser penetration depth, determining metallurgical phases using Micro-XRD, and examining microstructures with an SEM. Welding was performed at voltages from 150 to 230 V. Mean tensile strength for Ni-Ti groups was significantly lower (P < 0.05) than for most other groups of laser-welded specimens. Although mean tensile strength for beta-Ti and Co-Cr-Ni was significantly lower than for control specimens joined by silver soldering, it was sufficient for clinical use. The beta-Ti orthodontic wire showed deeper penetration depth from laser welding than the Ni-Ti and Co-Cr-Ni orthodontic wires. Micro-XRD patterns of laser-welded beta-Ti and Ni-Ti obtained 2 mm from the boundary were similar to as-received specimens, indicating that original microstructures were maintained. When output voltages of 190 V and higher were used, most peaks from joint areas disappeared or were much weaker, perhaps because of a directional solidification effect, evidenced by SEM observation of fine striations in welded beta-Ti. Laser welding beta-Ti and Co-Cr-Ni wires may be acceptable clinically, since joints had sufficient strength and metallurgical phases in the original wires were not greatly altered

Report

(3 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • Research Products

    (4 results)

All 2005 Other

All Journal Article (4 results)

  • [Journal Article] Laser welding investigation of orthodontic titanium-based wires2005

    • Author(s)
      Masahiro Iijima, Mikio Kuwabara, Toshihiro Yuasa, Takeshi Muguruma, Itaru Mizoguchi
    • Journal Title

      The Journal of Hokkaido Orthodontic Society 33(1)

      Pages: 1-8

    • NAID

      110008699305

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] Joining Titanium-based Orthodontic Archwires with Laser Welding

    • Author(s)
      M Iijima, WA Brantley, T Yuasa, I Kawashima, I Mizoguchi
    • Journal Title

      Journal of Biomedical Materials Research Applied Biomaterials (In press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Joining Titanium-based Orthodontic Archwires with Laser Welding

    • Author(s)
      M Iijima, WA Brantley, T Yuasa, I Kawashima, I Mizoguchi
    • Journal Title

      Journal of Biomedical Materials Research Applied Biomaterials (In press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Joining Titanium-based Orthodontic Archwires with Laser Welding

    • Author(s)
      M Iijima, WA Brantley, T Yuasa, I Kawashima, I Mizoguchi
    • Journal Title

      Journal of Biomedical Materials Research Applied Biomaterials (In press)

    • Related Report
      2006 Annual Research Report

URL: 

Published: 2005-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi