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1990 Fiscal Year Final Research Report Summary

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
KeywordsLaser Irradiation / Dentin / Smear Layer / Treatment of Dentin / Bonding / Pretreatment for Bonding
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.

  • Research Products

    (14 results)

All Other

All Publications (14 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
  • [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
  • [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
  • [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
  • [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
  • [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
  • [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
  • [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
  • [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
  • [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
  • [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
  • [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
  • [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
  • [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

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Published: 1993-08-12  

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