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Acid resistance of enamel by carbon dioxide laser irradiation

Research Project

Project/Area Number 11671909
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

IKEMI Takuji  Nihon University, School of Dentistry at Matsudo, Professor, 松戸歯学部, 教授 (80102565)

Co-Investigator(Kenkyū-buntansha) KAMIYA Naotaka  Nihon University, School of Dentistry at Matsudo, Research Assistant, 松戸歯学部, 助手 (00256893)
河野 善治  日本大学, 松戸歯学部, 助教授 (40147707)
山本 憲廣  日本大学, 松戸歯学部, 助手 (90301556)
Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 2001: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2000: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1999: ¥900,000 (Direct Cost: ¥900,000)
KeywordsCaries prevention / Carbon dioxide laser / Fluoride / Acid resistance of enamel / Acid resistance evaluation / Colorimeter / Super pulse / Free electron laser / フッ化ナトリウム / 歯質耐酸性 / 明度 / コンタクトマイクロラジオグラム / 非破壊的方法 / エナメル質 / 耐酸性 / フッ化カルシウム / 光沢計 / 乳酸 / エレメントアナライザー / 牛歯エナメル質 / Y値
Research Abstract

From a point of view of preventive dentistry, it is very important subject to improve acid resistance of enamel. The researchers connected with dental caries have investigated a lot about this project for a long time. As we have been able to use some kinds of lasers or newly developed vital tooth bleaching method in the dental clinic recently, we can examine the different approach to caries prevention. However, when we tried to improve the acid resistance of enamel with CO_2 laser alone, the irradiated enamel surface would change the color because of high power energy. Therefore, the purpose of the series of these studies were to clarify more effective as well as safety use of the CO_2 laser for acquiring the acid resistance with respect to enamel surface. Moreover, we focused our attention on a differential colorimeter as it enables easy and rapid determination of the degree of enamel decalcification. And its fundamental research and clinical application may be feasible.
1. For the evaluation of acid resistance with colorimeter, the lactic acid showed a better correlation between Λ Y and calcium elution than phosphoric acid. Fluoride applied enamel showed less value of Λ Y than without fluoride.
2. The simultaneous use of experimental fluorine-containing paste and CO_2 laser in super-pulse mode could improve the acid resistance of the enamel surface more effectively and safely.
3. Bleached enamel was decalcified easily, but fluoride treated after bleaching was recovered as same degree of sound enamel.
4. The acid resistance of enamel was more recovered by simultaneous using fluoride and CO_2 laser after bleaching than that of sound enamel.
5. It was implicated that the wavelength 8.5 μm of FEL showed less damageable to tooth structure.

Report

(4 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 杉山道紀: "エナメル質表面の耐酸性の評価に関する研究-色彩色差計を珊いた測定法-"日大口腔科学. 25. 326-338 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 深沢正幹: "炭酸ガスレーザーと試作フッ素含有ペースト併用による歯質耐酸性効果"日本歯科保存学雑誌. 43. 583-591 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 深沢正幹: "生活歯漂白後のエナメル質の耐酸性"日本歯科保存学雑誌. 43. 1113-1120 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 内山敏一: "生活歯漂白-フッ化物塗布と炭酸ガスレーザー併用によるエナメル質耐酸性獲得"日本歯科保存学雑誌. 45(印刷中). (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Sugiyama M: "Study on Acid Resistance Evaluation for Enamel Surface - Measuring Method with Color Meter -"Nihon Univ. J. Oral Sci. 25. 326-338 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Fukazawa M: "Acid Resistance Effect of Simultaneous Use of Carbon Dioxide Laser and Experimental Fluorine - containing Paste on Enamel"Japan. J. of Conserv. Dent. 43. 583-591 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Fukazawa M: "Acid Resistance of Enamel Surface after Vital Bleaching"Japan. J. of Conserv. Dent. 43. 1107-1112 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Uchiyama T: "Acid Resistance Effect of Simultaneous Use of Carbon Dioxide Laser and Fluoride on Bleached Enamel Surface"Japan. J. of Conserv. Dent. 45, (in print). (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 内山敏一: "生活歯漂白-フッ化物塗布と炭酸ガスレーザー併用によるエナメル質耐酸性獲得"日本歯科保存学雑誌. 45・2(予定). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] 深澤 正幹: "炭酸ガスレーザーとフッ素塗布によるエナメル質耐酸性"日本歯科保存学雑誌. 42巻秋季特別号. 46 (1999)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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