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A Study on the Surface Property of Dental Enamel after Fluoride Application

Research Project

Project/Area Number 61440084
Research Category

Grant-in-Aid for General Scientific Research (A)

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

Principal Investigator

KONISHI Koji  Osaka Dental University, Professor, 歯学部, 教授 (40066973)

Co-Investigator(Kenkyū-buntansha) UEMURA Mibu  Osaka Dental University, Instructor, 歯学部, 助手 (70168665)
KOIDA Takeshi  Osaka Dental University, Instructor, 歯学部, 助手 (30121817)
KUMAZAKI Mamoru  Osaka Dental University, Assistant Professor, 歯学部, 助教授 (80066985)
NOSHI Hideaki  Osaka Dental University, Lecturer, 歯学部, 講師 (20103088)
KAMBARA Masaki  Osaka Dental University, Lecturer, 歯学部, 講師 (90103085)
Project Period (FY) 1986 – 1987
Project Status Completed (Fiscal Year 1987)
Budget Amount *help
¥25,000,000 (Direct Cost: ¥25,000,000)
Fiscal Year 1987: ¥7,000,000 (Direct Cost: ¥7,000,000)
Fiscal Year 1986: ¥18,000,000 (Direct Cost: ¥18,000,000)
KeywordsFluoride / Hydroxyapatite / Fluorapatite / Calcium Fluoride / ESCA / Zeta potential / ハイドロキシアパタイト / フッ化カルシウム / エナメル質 / X線光電子 / 電気化学
Research Abstract

The present study was conducted to examine the surface preoperties of hydroxyapatite (HAp) and human dental enamel (enamel) treated with topical fluoride solutions.
The results of both ESCA and zeta potential measurements indicated that (1) NaF-treated HAp,especially on outermost surface layer, was almost same as untreated HAp, but the presence of fluoridated-apatite (FHAp) was determined by calcium binding energy (Ca2p peak position) of ESCA measurement on subsurface layer (2nd to 4th layer; 10 nm depth). (2) In APF treatment, negative zeta potentials was lower than untreated HAp. Calcium binding energy (Ca2p peak position) of APF treated HAp approached that of CaF2 (348.7 eV). This means that CaF2 was formed on surface of APF-treated HAp. (3) Negative zeta potentials of SnF2-treated HAp was higher than that of untreated HAp, and Sn3d peak intensity of ESCA measurement resulted in high levelas compared with the others on outermost surface. This finding suggested that SnF2 treatment for … More med a new product such as SnOF2 on the outermost surface of HAp. (4) There were no difference in treatment periods and times of each fluoride treatment.
The results of ESCA and zeta potential measurements of HAp, FAp and CaF2 suggested to be possible to determine the degree of fluoride on surface of fluoride treated HAp.
The ESCA measurements in human dental enamel treated with topical fluoride solutions indicated that (1) The outermost surface of NaF-treated enamel was a high level of fluoride uptake as compared with the other layers. (2) In APF treatment, a highest level of fluoride uptake was found in depth of about 20 nm, and its level was decreased with deeper layer in depth profile. This finding clarified that CaF2 was formed in depth of 20 to 40 nm by APF treatment. (3) SnF2-treated enamel was low level of fluoride uptake as compared with both NaF- and APF- treated enamel while Sn3d peak intensity resulted in high level on outermost surface.
These results suggest that the combined system of both ESCA and zeta potential analyses is possible to clarify the surface phenomenon, both kinetic actions and surface structure, of HAp and enamel treated with topical fluoride solutions. Less

Report

(2 results)
  • 1987 Final Research Report Summary
  • 1986 Annual Research Report

Research Products

(5 results)

All Other

All Publications (5 results)

  • [Publications] Koji Komishi,Masaki Kambara Hideaki Noshi and Mibu Uemura: J.Osaka Dental University. 21. 1-8 (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Koji Konishi, Masaki Kambara, Hideaki Noshi and Mibu Uemura: "X-ray Photoelectron Spectroscopic (ESCA) Study on the Surface of Hydroxyapatite" Journal of Osaka Dental University. 21. 1-8 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1987 Final Research Report Summary
  • [Publications] Koji Konishi;Masaki Kambara;Hideaki Noshi;Mibu Uemura: J.Osaka Dental University. 21. (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] Masaki Kambara;Mibu Uemura;Koji Konishi: J.Osaka Dental University. 21. (1987)

    • Related Report
      1986 Annual Research Report
  • [Publications] Tatsuro Miyake;Kazuo Nomura;Hideaki Noshi;Masaki Kambara;Koji Konishi: J.Osaka Dental University. 21. (1987)

    • Related Report
      1986 Annual Research Report

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Published: 1987-03-30   Modified: 2016-04-21  

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