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Characterization of Dental Materials by Fractal Analysis

Research Project

Project/Area Number 12671894
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 補綴理工系歯学
Research InstitutionNagasaki University

Principal Investigator

TAKUMA Yasuko  Nagasaki University, Dept. Dental Materials Science, Research Fellow, 歯学部, 教務職員 (60160074)

Co-Investigator(Kenkyū-buntansha) TANAKA Yasuhiro  Nagasaki University, Dept. Dental Materials Science, Instructor, 歯学部, 助手 (10217086)
SHIRAISHI Takanobu  Nagasaki University Dept. Dental Materials Science, Associate Professor, 歯学部, 助教授 (10150468)
HISATSUNE Kunihiro  Nagasaki University, Dept. Dental Materials Science, Professor, 歯学部, 教授 (20037526)
MIURA Eri  Nagasaki University, Dept. Dental Materials Science, Instructor, 歯学部, 助手 (70315258)
Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 2001: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2000: ¥2,400,000 (Direct Cost: ¥2,400,000)
Keywordsdental alloy / morphology / fractal analysis / wuantification / grain boundary reaction / fractal dimension / 歯科材料 / 結晶粒微細化
Research Abstract

Fractal theory was applied to the quantification of the morphological characteristics of grain boundary reaction in dental alloys. The optical microstructure images of a gold alloy for porcelain fusing and a Ag-Pd-Cu-Au alloy were transformed into black-and white images by using a threshold method with a given threshold value. The binary images of each sample clearly showed the growth of grain boundary precipitates with increasing aging time or temperature. Fractal dimension value of the binary images which was computed by fractal dimension calculation program apparently increase with the progress of grain boundary precipitation.

Report

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

    (24 results)

All Other

All Publications (24 results)

  • [Publications] H-I.Kim: "Age-hardening reactions in a type III dental gold alloy"Biomaterials. 22. 1433-1438 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] I.Watanabe: "In vitro corrosion behavior of cast iron-platinum magnetic alloys"Dental Materials. 17. 217-220 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] I.Watanabe: "Attractive force of castable iron-platinum magnetic alloys"Dental Materials. 17. 197-200 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Suematsu: "Novel large-Area High-Resolution-Electron-Microscopy Technique using specimens fabricated by a focused Ion Beam Apparatus"Japanese Journal of Applied Physics. 40. 1100-1103 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H-I.Kim: "Phase transformation behavior in a multipurpose dental casting gold aloy during continuous heating"Journal of Materials Science : Materials in Medicine. 11. 61-66 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H.Winn: "Coherent phase diagram of Au-Cu-Pd temary system near and within the two-phase region of Au_3Cu and AuCu I ordered phases"Journal of Alloys and Compounds. 308. 269-274 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H-I. Kim: "Age-hardening reactions in a type III dental gold alloy"Biomaterials. 22. 1433-1438 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] I. Watanabe: "In vitro corrosion behavior of cast iron-platimum magnetic alloys"Dental Materials. 17. 217-220 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] I. Watanabe: "Attractive force of castable iron-platinu m magnetic alloys"Dental Materials. 17. 197-200 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Suematau: "Novel large-Area High-Resolution-Electron-Microecopy Technique using specimens fabricated by a focused Ion Beam Apparatus"Japanese Journal of Applied Physical. 40. 1100-1103 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H-I. Kim: "Phase dransformation behavior in a multipurpose dental casting gold aloy during continuous heating"Journal of Materials Science: Materials in Medicine. 11. 61-66 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H. Winn: "Coherent phase diagram of Au-Cu-Pd ternary system near and within the two-phase region of Au_3Cu and AuCu I ordered phases"Journal of Alloys and Compounds. 308. 269-274 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] H-I.Kim: "Age-hardening reactions in a type III dental gold alloy"Biomaterials. 22. 1433-1438 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] I.Watanabe: "In vitro corrosion behavior of cast iron-platimum magnetic alloys"Dental Materials. 17. 217-220 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] I.Watanabe: "Attractive force of castable iron-platinum magnetic alloys"Dental Materials. 17. 197-200 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] H.Suematsu: "Novel large-Area High-Resolution-Electron-Microscopy Technique using specimens fabricated by a focused Ion Beam Apparatus"Japanese Journal of Applied Physics. 40. 1100-1103 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] H-I.Kim: "Phase transformation behavior in a multipurpose dental casting gold aloy during continuous heating"Journal of Materials Science : Materials in Medicine. 11. 61-66 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] H.Winn: "Coherent phase diagram of Au-Cu-Pd temary system near and within the two-phase region of Au, Cu and AuCu I ordered phases"Journal of Alloys and Compounds. 308. 269-274 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] Kim,H.I.: "Phase transtormation behavior in a multipurpose dental casting gold alloy during continuous heating"Journal of Materials Science : Materials in Medicine. 11. 61-66 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Htain Winn: "Two types of checkerboard-like microstructures in Au-Cu-Pd ternary alloys"Journal of Alloys and Compounds. 306. 262-269 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Htain Winn: "Characteristic microstructures associated with order-disorder transition in Au-Cu-Pd ternary alloys"Scripta Materialia. 43. 313-317 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Htain Winn: "Coherent phase diagram of Au-Cu-Pd ternary system near and within the two-phase region of Au_3Cu and AuCu I ordered phase"Journal of Alloys and Compounds. 308. 269-274 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Lee,K.H.: "Phase transformation of a dental casting gold alloy during anisothermal annealing"The Journal of the Korea Research Society for Dental Materials. 27・3. 217-222 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Lee,K.H.: "Heat treatment and phase transformation of a dental casting Au-Zn-Pt alloy"The Journal of the Korea Research Society for Dental Materials. 27・3. 223-230 (2000)

    • Related Report
      2000 Annual Research Report

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

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