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Concentration for Double Acting of F^- to Fluorine Photochemical Reaction

Research Project

Project/Area Number 08672383
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 矯正・小児・社会系歯学
Research InstitutionOhu University

Principal Investigator

MIYAZAWA Chyuzo  Dept.of Chemistry, Ohu University School of Dentistry, Professor, 歯学部, 教授 (70083441)

Co-Investigator(Kenkyū-buntansha) KOKUBUN Miwako  Dept.of Preventive Dentistry, Ohu University School of Dentistry, Assistant, 歯学部, 助手 (20195704)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1997: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1996: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsEnamel / F^- concentration / Fluoridization / Photochemical reaction / Excimer laser beam irradiation / PO_4^<3->濃度 / エキシマレーザー / フッ化物濃度 / F-取り込み
Research Abstract

We studied F^- uptake of enamels by simultaneously acting excimer laser irradiation (ultraviolet zone) and various percentages of F^- solution (photochemical reaction). These enamel specimens were polished up to 200mum from 4-faced surfaces of an extracted molar. They were divided into 4 groups the double acting group of F^- solution and irradiation, the group of F^- coating, the irradiation group, and the control group. The 248nm KrF laser consisting of 70mJ/cm^2 500-5,000 shots and 0.1-4.0% of F^- solution (NaF and MFP) was used. After washing out the enamel speciments with 1M-KOH for 24 hours, the surfaces were observed by SEM and XPS,and acid resistance was tested. Cellulose acetate menmbranes adding 0.1M Lactic acid buffer (pH4.0,2mul) were attached at the speciments for one minute. Eluted Ca amounts were analyzed by ICP.Because of the results of the SEM and XPS,it was suggested that photochemical reaction was induced by irradiation. There were significant differences of acid resistance among the groups (p<0.05, one way ANOVA). Eluted Ca amounts of each group which triggered NaF of 4.0 from 0.1% was 0.34-0.50mug with the double acting froup, 0.55-0.69mug with the coating group, 0.59-0.77mug with the irradiation group, and 0.65-0.88mug with the control group. The double acting group with 1%F^- (NaF) was strongest, with acid resistance tending to be weaker in order of the coating group, the irradiation group, and the control group. This group showed a 51.0% effect compared with the control group.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 秋山 哲夫, 宮澤 忠蔵 他4名: "再石灰化液のエナメル質作用時におけるエキシマレーザー光照射の影響" 日本口腔衛生学会雑誌. 46. 512-513 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 国分 美和子, 宮澤 忠蔵 他4名: "エナメル質のフッ素取り込みに及ぼすエキシマレーザー光照射の影響-フッ化物の作用濃度と耐酸性の関連性-" 日本口腔衛生学会雑誌. 46. 626-627 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] C.Miyazawa et.al.: "The Effects of Excimer Laser Beam Irradiation on F^- Uptake of Enamel." Annual Report of the OSAKA Laboratory for Radiation Chemistry Japan Atomic Energy Research Institute. 29. 25-28 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 五十嵐 栄, 宮澤 忠蔵 他5名: "エキシマレーザー光照射によるエナメル質のフッ素取り込みに及ぼすリン酸イオンの影響" 日本口腔衛生学会雑誌. 47. 500-501 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] T.Akiyama, C.Miyazawa, et.al.: "The Effects of Excimer Laser Irradiation in Enamel action of Remineralization liqued" Journal of Dental Health. 46. 512-513 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] M.Kokubun, C.Miyazawa et.al.: "Concentration for Double Acting of F^- to Fluourine Photochemical Reaction" Journal of Dental Health. 46. 626-627 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] C.Miyazawa, et.al.: "The Effects of Excimer Laser Beam Irradiation on F^- Uptake of Enamel" Annual Report of the Osaka Laboratory for Radiation Chemistry Jpan Atomic Energy Reseach Institute. 29. 25-28 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] S.Igarashi, C,Miyazawa et.al.: "The Acting Concentration of PO_4^<3-> for Fluorine Photochemical Reaction" Journal of Dental Health. 47. 500-501 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] C.Miyazawa et.al: "The Effects of Excimer Laser Beam Irradiation on F^- Uptake of Enamel" Annual Report of the Osaka Laboratory for Radiation Chemistry Japan Atomic Energy Research Institute. 29. 25-28 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 五十嵐栄, 宮澤忠蔵他5名: "エキシマレーザー光照射によるエナメル質のフッ素取り込みに及ぼすリン酸イオンの影響" 日本口腔衛生学会雑誌. 47. 500-501 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 国文美和子,浜田節男,宮澤忠蔵 他3名: "エナメル質のフッ素取り込みに及ぼすエキシマレーザー光照射の影響-フッ化物の作用濃度と耐酸性の関連性-" 口腔衛生学会雑誌. 46・4. 626-627 (1996)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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