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Development of new method for root canal filling using the shape memory polymer

Research Project

Project/Area Number 14571818
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Conservative dentistry
Research InstitutionKagoshima University

Principal Investigator

TSUKADA Gakuji  Kagoshima University, Graduate School of Medical and Dental Sciences, Research Associate, 大学院・医歯学総合研究科, 助手 (70236850)

Co-Investigator(Kenkyū-buntansha) TANAKA Toshiaki  Kagoshima University, University hospital, Faculty of medicine and Dentistry, Research Associate, 医学部・歯学部附属病院, 助手 (80332899)
MATSUSHITA Kenji  Kagoshima University, Graduate School of Medical and Dental Sciences, Research Associate, 大学院・医歯学総合研究科, 助手 (90253898)
TORII Mitsuo  Kagoshima University, Graduate School of Medical and Dental Sciences, Professor, 大学院・医歯学総合研究科, 教授 (30116066)
Project Period (FY) 2002 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2004: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2003: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2002: ¥2,300,000 (Direct Cost: ¥2,300,000)
Keywordsshape memory polymer / trans polyisoprene / root canal filling material / sealing test / 根管充填材 / 形状記憶
Research Abstract

The shape memory polymer was produced by using the closs-linked gutta percah (trans polyisoprene). The Sulfur and Dicumyl peroxide were compounded for cross-linking agent, Zinc oxide and Stearic acid were compounded for cross-linking promoter. The mechanism of shape memory for closs-linked gutta percah was proved following. The test specimen that was memorized for original shape by cross-linking could be deformed easily by heating at over the transition temperature. This deformed specimen was cooled at under the transition temperature and the shape of specimen was fixed by crystallization by trans polyisoprene. The fixed shape could restore to original shape by means of the heating at over the transition temperature. This behavior was according to the melting of the crystallization of trans polyisoprene. The restoration temperature could be adjusted by the addition of cis polyisoprene or cross-linking agent. And the restoration temperature could be established at under the intra-oral temperature. As addition of the cross-linking agent increased the elastic modulus increased, and as addition of the cis polyisoprene increased the elastic modulus decreased. The point for root canal filling was produced by using the shape memory polymer and the sealing test was conducted using it. The canal for filling was used glass tube, root canal for bovine tooth and artificial root canal produced by acryl. The sealing test for glass tube using the shape memory polymer was shown superior sealing for eighteen months. The sealing test using the shape memory polymer was shown to be more superior to that using the vertical condensation method. The sealing test using the shape memory polymer for the artificial root canal which was enlarged by using #130 reamer was showed to be superior sealing.

Report

(4 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (5 results)

All 2003 2002 Other

All Journal Article (2 results) Patent(Industrial Property Rights) (3 results)

  • [Journal Article] Shear modulus and thermal properies of gutta percha for root canal filling.

    • Journal Title

      Journal of Oral Rehabilitation Vol.31, Issue 11

      Pages: 1139-1143

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Shear modulus and thermal properies of gutta percha for root canal filling.

    • Author(s)
      Gakuji Tsukada, Toshiaki Tanaka, Mituo Torii, Katsuichiro Inoue
    • Journal Title

      Journal of Oral Rehabilitation Vol.31, Issue 11

      Pages: 1139-1143

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Patent(Industrial Property Rights)] 特許権2003

    • Inventor(s)
      塚田 岳司
    • Industrial Property Rights Holder
      塚田 岳司
    • Industrial Property Number
      2003-138706
    • Filing Date
      2003-05-16
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Patent(Industrial Property Rights)] 特許権2002

    • Inventor(s)
      塚田 岳司
    • Industrial Property Rights Holder
      塚田 岳司
    • Industrial Property Number
      2002-300842
    • Filing Date
      2002-10-15
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Patent(Industrial Property Rights)] 特許権2002

    • Inventor(s)
      塚田 岳司, 鳥居 光男, 田中 利明
    • Industrial Property Rights Holder
      塚田 岳司, 鳥居 光男, 田中 利明
    • Industrial Property Number
      2002-300842
    • Filing Date
      2002-10-15
    • Related Report
      2004 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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