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Fundamental and Clinical Studies on the Effect of Lasers Against Dental Hard Tissues

Research Project

Project/Area Number 01304048
Research Category

Grant-in-Aid for Co-operative Research (A)

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

Principal Investigator

MORIOKA Toshio  Kyushu University, Faculty of Dentistry, Professor, 歯学部, 教授 (00028721)

Co-Investigator(Kenkyū-buntansha) MAEDA Mitsuo  Kyushu University, Faculty of Engineering, Professor, 工学部, 教授 (80037910)
SHOJI Shigeru  Tohoku University, Faculty of Dentistry, Assistant Professor, 歯学部, 講師 (10142986)
KUMAZAKI Mamoru  Osaka Dental University, Associate Professor, 助教授 (80066985)
TANI Yoshiaki  Kyoto University, Center for Biomedical Engineering, Professor, 教授 (90026881)
MATSUMOTO Kokichi  Showa University, Faculty of Denistry, Professor, 歯学部, 教授 (70119171)
Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥6,100,000 (Direct Cost: ¥6,100,000)
Fiscal Year 1990: ¥3,100,000 (Direct Cost: ¥3,100,000)
Fiscal Year 1989: ¥3,000,000 (Direct Cost: ¥3,000,000)
KeywordsLaser / Incipient Caries / Acid Resistance / Enamel / Fluoride / Hyper Sensitive Dentine / Pain Relieve / Secondary Dentine / 歯髓内酵素 / 低エネルギ-・レ-ザ- / エナメル質耐酸性 / 歯髄の石灰化 / 初期齲蝕の進行抑制
Research Abstract

1. Combined effect of laser and fluoride on incipient dental caries
Artificial caries lesions were made on the buccal surface of human premolars, and the enamel was then treated with laser and fluoride. The acid resistance of the enamel was examined by demineralization in acidic solutions. An increase in acid resistance and fluoride uptake was caused by floride treatment after Nd-YAG laser irradiation. Specimens of human enamel were topically applied with solutions of acidulated phosphate fluoride. In addition, remarkable remineralization of artificial caries lesions was seen in these specimens after exposure to calcifying fluid.
2. Effect of laser on relieving pain of hyper sensitive dentine
Sixty patients with cervical hyper sensitive dentine were irradiated with 60 mW of diode laser for relieving pain. An analjesic effect was observed in all the cases, especially in the case of grade 1 and 2. The effect was less sensitive in the case of grade 3.
Similar results were obtained by using He-Ne laser with 10 mW. These results indicate that the low power lasers are useful for treatment of patients with hyper sensitive dentine.
3. Effect of laser on activation of enzymes in dental pulp
Stimulation of secondary dentine formation was observed by Nd-YAG laser irradiation. This phenomenon is due to the activation alkaline phosphatase. The pulpal chamber was almost completely filled with sencondary dentine 4 weeks after CO_2 laser irradiation.

Report

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

    (26 results)

All Other

All Publications (26 results)

  • [Publications] 森岡 俊夫: "レ-ザ-による歯科医療の最近の進歩" 医療. 6. 82-85 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Toshi Morioka: "Low Power Laser in Dentistry" proceeding on 2nd World Congerss of Laser in Medicine. 18-19 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Yoshiaki Tani: "Morphology of Dentinal Smear Laser Formed by Different Cutting Instruments" Abstracts of 38th Annual Meeting of Japanese Association for Dental Research. 54. 54 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 熊崎 護: "象牙質知覚敏症に対する半導体レ-ザ-の治療効果" 日本歯科保存学会雑誌. 33. 911-918 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 前田 三男: "分光分折用メンテナンスフリ-TEA室素レ-ザ-" レ-ザ-研究. 18. 79-83 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Mitso Maeda: "Laser Induced Fluorsence Detection of Sodium Atomized by a Microwave Induced Plasma" Analytical Chemistry. 62. 680-683 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Toshio Morioka: "Recent Development of Lasers in Dentistry" Iryo. 6. 82-85 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Toshio, Morioka: "Low Power Laser in Dentistry" Proceedings on 2nd World Congress ofLaser in Medicine. 18-19 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Yoshiaki Tani: "Morphology of Dentinal Smear Laser Formed by Different Cutting Instruments" Abstracts of 38th Annual Meeting of Japanese Association for Dental Research, 54. 54. (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Mamoru Kumazaki: "Clinical Effects of Semi-conductor Laser on Hypersensitive Dentine" The Japanese Journal of Conservative Dentistry. 33. 911-918 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Mitsuo Maeda: "Maintenance-free TEA-M_2 Laser for Spectrophotometric Analysis" Laser Research. 18. 79-83 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] Mitsuo Maeda: "Laser-Induced-Fluoresence Detection of Sodium Atomized by a Microwave-Induced Plasma" Analytical Chemistry. 62. 680-683 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 森岡 俊夫: "レ-ザ-による歯科医療の最近の進歩" 医療. 6. 82-85 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Toshio Morioka: "Low Power Laser in Dentistry" Proceedings on 2nd World Congress of Laser in Medicine. 18-19 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Yoshiaki Tani: "Morphology of Dentinal Smear Layer Formed by Different Cutting Instruments" Abstracts of 38th Annual Meeting of Japanese Association for Dental Research. 54. 54 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 熊崎 護: "象牙質知覚過敏症に対する半導体レ-ザ-の治療効果" 日本歯科保存学会雑誌. 33. 911-918 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 前田 三男: "分光分析用メンテナンスフリ-TEA窒素レ-ザ-" レ-ザ-研究. 18. 79-83 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Mitsuo Maeda: "LaserーInducedーFluoresence Detection of Sodium Atomized by a MicrowaveーInduced Plasma" Analytical Chemistry. 62. 680-683 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Toshio Morioka: "Applicability of Nd-YAG Laser on Prevention of Dental Caries" Proceedings of the International Society for Optical Engineering. 907. 94-95 (1988)

    • Related Report
      1989 Annual Research Report
  • [Publications] Shoko Tagomori: "Combined Effect of Laser and Fluoride on Acid Resistance of Human Dental Enamel" Caries Research. 23. 225-231 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Takahiko Oho: "A Possible Mechannism of Acquired Acid Resistance of Human Dental Enamel by Laser Irradiation" Caries Research. in press.

    • Related Report
      1989 Annual Research Report
  • [Publications] Kouichi Ochi: "A Morphological Study of Dentinal Nerve Endings" J.Endodontology. 14. 601-608 (1988)

    • Related Report
      1989 Annual Research Report
  • [Publications] Atsushi Funato: "Effect of Nd:YAG Laser Irradiation on Micro-circulation" J.Showa University Dental Society. 28. 13-21 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] Shigeru Shoji: "Histo pathological Changes of Dental Pulp after Irradiation by Argon,CO_2 or Nd-YAG Laser in Rat" Excerpta Medica,Amsterdam. 253-258 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 森岡俊夫: "レ-ザ-臨床(上)" 日本医療文化センタ-, 158 (1989)

    • Related Report
      1989 Annual Research Report
  • [Publications] 森岡俊夫: "レ-ザ-臨床(下)" 日本医療文化センタ-, 144 (1989)

    • Related Report
      1989 Annual Research Report

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

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