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Adhesive properties and mechanism of resinous materials to Er.YAG and CO_2 lased dentin

Research Project

Project/Area Number 12671852
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Conservative dentistry
Research InstitutionHIROSHIMA UNIVERSITY

Principal Investigator

SHINTANI Hideaki  Hiroshima University, Faculty of Dentistry, Professor, 歯学部, 教授 (80034239)

Co-Investigator(Kenkyū-buntansha) URABE Hidenori  Hiroshima University, Dental Hospital, Lecturer, 歯学部・附属病院, 講師 (10231185)
FUJITANI Morioki  Hiroshima University, Faculty of Dentistry, Associate Professor, 歯学部, 助教授 (60190055)
Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 2001: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2000: ¥2,100,000 (Direct Cost: ¥2,100,000)
KeywordsEr:YAG Laser / CO2 Laser / Adhesive resin / Dentin Bonding / Mechanism of Adhesion / Interface of Adhesion / Morphological Study / Analytical-chemical Study / CO2レーザー / 形態学研究 / Er:YAGレーザー
Research Abstract

This study was to investigate 1) the changes of surface characteristics of Er:YAG or CO2 lased dentin and 2) the adhesive properties of resinous materials to the lased dentin.
Labial surface of freshly extracted bovine tooth was ground to expose flat dentin. The dentin surfaces were then polished with 600-grid SiC paper and were irradiated by Er:YAG laser (60mJ/pulse, 10pps). The superficial layer of the lased dentin was morphologically examined by Atomic Force Microscopy (AFM) and Transmission Electron Microscopy (TEM). The surface characteristics of lased dentin were chemically analyzed using X-ray Photoelectron Spectroscopy (XPS). In addition, the laser-irradiated cavity was restored with Mega Bond/AP-X according to the manufacturer's instructions, and the interfacial micro- and ultra-structures were observed under Scanning Electron Microscopy (SEM).
The AFM observation revealed that the structural defects such as micro cracks and stratified structures were formed. By the TEM observat … More ions, the amorphous matrix substances of 10-15mm thickness, which consisted of denatured dentin collagen, were superficially observed. The analysis of XPS wide-scan spectrum of lased dentin surface showed the intensity of both CIs and NIs peaks obviously decreased. The SEM examination of resin-dentin interface revealed that the degenerated layer of 10-12mm thickness was observed beneath the hybrid layer.
Early bond strength and durability of adhesion of the commercial adhesives to the lased dentin were significantly lower than those to the rotary cut dentin in micro-tensile bond test. This might be caused by the concentration of stress to those structural defects, by the inhibition of resin-impregnation due to the denatured layer, or by the deterioration of mechanical properties of the hybrid layer and the lased dentin itself.
It was suggested that both the structural defects and the denatured layer affect the adhesive properties of resinous materials to the Er:YAG laser-irradiated dentin. Less

Report

(3 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • Research Products

    (19 results)

All Other

All Publications (19 results)

  • [Publications] K.Shirai: "Assessment of Decontamination Methods as Pretreatment of Silanization of Composite Glass Fillers"J Biomed Mater Res (Appl Biomater). 53. 204-210 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 播磨 貴裕: "各種レ-ザ-処理された象牙質面に有効な接着システムについて"日本歯科医師会雑誌. 52. 1371 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 播磨 貴裕: "「歯科医学と健康の創造」 各種レ-ザ-処理された象牙質面に有効な接着システムについて"歯界展望. 増刊号. 312 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 播磨 貴裕: "レ-ザ-処理象牙質におけるレジンの接着 第5報 接着界面の超微細構造について"日本歯科保存学雑誌. 44. 12 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] T.Harima: "Surface Characteristics of Laser (Er : YAG) -irradiated Dentin"Transactions of the First Congress of the International. (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 播磨 貴裕: "レ-ザ-処理象牙質におけるレジンの接着 第6報 接着界面の超微細構造学的ならびに分析化学的検討"日本歯科保存学雑誌. 46. (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Kenichi Shirai: "Assessment of Decontamination Methods as Pretreatment of Silanizaion of Composite Glass Fillers"J Biomed Mater Res (Appl Biomater). 53. 204-210 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Takahiro Hrima: "Effective bonding systems to lased dentin"The Journal of the Japan Dental Association. 52 (11). 1371 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Takahiro Harima: "Adhesive properties of resinous materials to lased dentin Part 5 Interfacial ultramorphology between adhesives and lased dentin"The Japanese Journal of Conservative Dentistry. 44 (Spring issue). 12 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Takahiro Harima: "Surface characteristics of laser (Er:YAG) - irradiated Dentin"Transactions of the First Congress of the International Adhesive Dentistry (IAD 2002).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Takahiro Harima: "Adhesive Properties of Resinous Materials to Lased Dentin Part 6 Interfacial Ultramorphological and Chemical Analysis between Adhesives and Lased Dentin"The Japanese Journal of Conservative Dentistry. 46 (Spring issue). 12 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Takahiro Harima: "Toward New Health Cleativity in Dental Science - Effective bonding systems to lased dentin., Dental Outlook, Extra Issue, 312"Ishiyaku Publishers, Inc., Tokyo. (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 播磨 貴裕: "レーザー処理象牙質におけるレジンの接着 第5報 接着界面の超微細構造について"日本歯科保存学雑誌. 44春季特別号. 12 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Harima: "Surface Characteristics of Laser (Er : YAG)-irradiated Dentin"Transactions of the First Congress of the lntenational Adhesive Dentistry (lAD2002). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] 播磨 貴裕: "レーザー処理象牙質におけるレジンの接着 第6報 接着界面の超微細構造学的ならびに分析化学的検討"日本歯科保存学雑誌. 46春季特別号. (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Shirai: "Assessment of Decontamination Methods as Pretreatment of Silanization of Composite Glass Fillers"J Biomed Mater Res (Appl Biomater). 53. 204-210 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 播磨貴裕: "各種レーザー処理された象牙質面に有効な接着システムについて"日本歯科医師会雑誌. 52・11. 1371 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 播磨貴裕: "「歯科医学と健康の創造」各種レーザー処理された象牙質面に有効な接着システムについて"歯界展望. 増刊号. 312 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] 播磨貴裕: "レーザー処理象牙質におけるレジンの接着 第5報 接着界面の超微細構造について"日本歯科保存学雑誌. 44. (2001)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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