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

A Study of Application of Shape Memory Plastic as Elastic Material in Clinical Dentistry and Orthodontics.

Research Project

Project/Area Number 01480483
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 小児・社会系歯学
Research InstitutionKyushu University

Principal Investigator

NAKASIMA Akihiko  Kyushu Univ., Fac. of Dent., Lecturer, 歯学部, 講師 (00037524)

Co-Investigator(Kenkyū-buntansha) TAMARI Kazuhiko  Kyushu Univ., Fac. of Dent., Instructor, 歯学部, 助手 (60037538)
ICHINOSE Motoshi  Kyushu Univ., Fac. of Dent., Instructor, 歯学部, 助手 (30150460)
Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥5,700,000 (Direct Cost: ¥5,700,000)
Fiscal Year 1990: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1989: ¥3,800,000 (Direct Cost: ¥3,800,000)
KeywordsShape memory plastic / Polynorbornen / Elastic material / Tooth retraction force
Research Abstract

Polynorbornen, a shape memory plastic developed in Japan, has a glass transitional point of 35^゚C. Once the environmental temperature exceeds the critical point, this plastic will begin to display an elastic property, then return to its original shape, if deformed. We examined whether the force generated during the elastic phase of polynorbornen could be used to displace human teeth. We found that the shape memory plastic wire of 1mm in diameter stretched to two to three times of its original length at a temperature of 50^゚C and a speed of 0.5mm/sec would exert a relatively stable continuous light force of 119-156 grams to move the teeth. This new material, compared with conventional elastic modules used in orthodontic therapy, exhibited a laser degree of force degradation at a body temperature of 37^゚C for a long period, and can be manufactured to near the tooth color required. These advantages make feasible clinical application of the shape memory plastic in orthodontics. However, a combination with conventional metal wires cannot be avoided for practical purposes, and its clinical efficiency has to be further studied.

Report

(3 results)
  • 1990 Annual Research Report   Final Research Report Summary
  • 1989 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] 中島 昭彦: "形状記憶樹脂の歯科矯正材料への応用 ー牽引力の測定と歯の移動シミュレ-ションー" 日本矯正歯科学会雑誌. 50. 147-157 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Nakasima,A: "Potential application of shape memory plastic as elastic material in clinical orthodontics" European journal of orthodontics. in press. (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 入江 正浩: "形状記憶ポリマ-の開発と応用:歯科用材料" ジ-エムシ-, 221 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Akihiko, NAKASIMA et al: "Application of shape memory plastic as orthodontic material -Traction force measurement and typodontic simulation-" J. Jpn. Orthod. Soc.50(2). 147-157 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Akihiko, NAKASIMA et al: "Potential application of shape memory plastic as elastic material in clinical orthodontics." Europ. J. of Orthod. (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Masahiro IRIE: "Development and application of shape memory polimer" C. M. C. Co. Ltd.,. 225. (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 中島 昭彦: "形状記憶樹脂の歯科矯正材料への応用ー牽引力の測定と歯の移動シミュレ-ションー" 日本矯正歯科学会雑誌. 50. 147-157 (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] Nakasima,A: "Potential application of shape memory plastic as elastic material in clinical orthodontics" European journal of orthodontics. (1991)

    • Related Report
      1990 Annual Research Report
  • [Publications] 入江正浩: "形状記憶ポリマ-の開発と応用" ジ-エムシ-, 221 (1989)

    • Related Report
      1989 Annual Research Report

URL: 

Published: 1989-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi