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Pretreatment of Dentin Surface by Laser Irradiation

Research Project

Project/Area Number 01480447
Research Category

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

Allocation TypeSingle-year Grants
Research Field 補綴理工系歯学
Research InstitutionKyoto University

Principal Investigator

TANI Yoshiaki  Kyoto University, Research Center for Biomedical Engineering, Professor, 生体医療工学研究センター・生体材料学研究部門, 教授 (90026881)

Co-Investigator(Kenkyū-buntansha) TOGAYA Toshihiro  Kyoto University, Research Center for Biomedical Engineering, Assistant Professo, 生体医療工学研究センター・生体工学研究部門, 助手 (50127106)
TSUTSUMI Sadami  Kyoto University, Research Center for Biomedical Engineering, Associate Professo, 生体医療工学研究センター・人工臓器学研究部門, 助教授 (00028739)
Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥6,700,000 (Direct Cost: ¥6,700,000)
Fiscal Year 1990: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1989: ¥5,100,000 (Direct Cost: ¥5,100,000)
KeywordsLaser Irradiation / Dentin / Smear Layer / Treatment of Dentin / Bonding / Pretreatment for Bonding / レーザー / 象牙質前処理
Research Abstract

Various adhesion promoters have been developed and are in wide use. However, the treatment of the dentin as an adherent is a more important issue. A variety of procedures have been proposed for the treatment of the smear layer produced by cutting the dentin surface ; but, in view of dentin permeability and protection of the dental pulp, any method of pretreatment that is likely to cause decalcification of the peritubular dentin, and opening and expansion of the dentinal tubules, should be avoided.
We investigated the possibility of treating the smear layer by laser irradiation. The surface of the smear layer was irradiated with a laser, and the changes were observed under a scanning electron microscope. A CO_2 gas laser (Satelec Lasersat CO_2) was used in defocus. The results showed that the laser induced changes in the smear layer. The smear layer on the intertubular dentin was satisfactorily treated, with the tubular orifices closed at the energy densities of 30-50 J/cm^2.
Next, we determined the temperature rise in the pulp by CO_2 laser irradiation. The temperature rise by laser irradiation at the energy density of 60 J/cm^2 in defocus showed below 6^゚C if the thickness of the remaining dentin to the pulp from the cavity floor was more thicker than 1 mm.

Report

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

    (24 results)

All Other

All Publications (24 results)

  • [Publications] 谷 嘉明: "コンポジットレジンによるHIディスク接着への応用" 接着歯学. 7. 143-144 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Yoshiaki Tani: "Contraction force during polymerization of various composite resins" Dentistry in Japan. 26. 99-100 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 谷 嘉明: "新しいYAGレ-ザ-吸収色素について" 日本レ-ザ-歯学研究会誌. 1. 9- (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 谷 嘉明: "保存修復におけるレ-ザ-応用の基礎的研究" 日本レ-ザ-歯学研究会誌. 1. 37-38 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 谷 嘉明,南部 敏之: "Normal Pulse NdーYAG レ-ザによるチタンの溶接" 第2回日本レ-ザ-歯学研究会講演抄録集. 18- (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 谷 嘉明,南部敏之: "Co_2レ-ザ-による象牙質への照射効果" 第2回日本レ-ザ-歯学研究会講演抄録集. 30 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 森岡 俊夫,松本 光吉 編(谷 嘉明 分担執筆): "レ-ザ-臨床上巻" デンティスト社, 157 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tani, Y.: "Contraction Force during Polymerization of Various Composite Resins." Dentistry in Japan. Vol. 1. 97-100 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tani, Y.: "Application for Bonding Human Identification Disk to Tooth with Treatment Composite Resin." Adhesive Dentistry. Vol. 7. 143-144 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tani, Y.: "Application of the Absorption Dyes in the Region of the Wavelength of YAG Laser." Journal of Japanese Society of Laser in Dentistry. 1. 9 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tani, Y.: "Basic Study on Laser Application to Dental Restoration." Journal of Japanese Society of Laser in Dentistry. 1. 37-38 (1989)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tani, Y.: "Effects of Laser Irradiation on Surface Characteristics of Dentin" Abstracts of Papers of the 2nd World Congress of International Society for Lasers in Dentistry. 98 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tani, Y. and Nambu, T.: "Laser Welding of Pure Titanium." Abstracts of Papers of the 2nd Annual Meeting of Japanese Society of Laser in Dentistry. 18 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Tani, Y. and Nambu, T.: "Effects of CO_2 Laser Irradiation on Dentin." Abstracts of Papers of the 2nd Annual Meeting of Japanese Society of Laser in Dentistry. 30 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 谷 嘉明: "コンポジットレジンによるHIディスク接着への応用" 接着歯学. 7. 143-144 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] Yoshiaki Tani: "Contraction force during polymerization of various composite resins" Dentistry in Japan. 26. 97-100 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] 谷 嘉明: "新しいYAGレーザー吸収色素について" 日本レーザー歯学研究会誌. 1. 9 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] 谷 嘉明: "保存修復におけるレーザー応用の基礎的研究" 日本レーザー歯学研究会誌. 1. 37-38 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] 谷 嘉明,南部 敏之: "Normal Pulse NdーYAGレーザーによるチタンの溶接" 第2回日本レーザー歯学研究会講演抄録集. 18 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 谷 嘉明,南部 敏之: "CO_2レーザーによる象牙質への照射効果" 第2回日本レーザー歯学研究会講演抄録集. 30 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 森岡 俊夫,松本 光吉編,谷 嘉明(分担執筆): "レーザー臨床 上巻" デンティスト社, 157 (1989)

    • Related Report
      1990 Annual Research Report
  • [Publications] 谷嘉明: "透明コンポジットレジンによるHIディスク接着への応用" 接着歯学. 7. 143-144 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 谷嘉明: "歯科における高分子の利用" 高分子加工. 38. 262-268 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 森岡俊夫,松本光吉編(谷嘉明分担執筆): "レ-ザ-臨床上巻" デンティスト社, 157 (1989)

    • Related Report
      1989 Annual Research Report

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

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