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Development of new composite resin for core build -up with similar machinability of dentin

Research Project

Project/Area Number 13672027
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 InstitutionTokyo Medical and Dental University

Principal Investigator

IWASAKI Naohico  Tokyo Medical and Dental University, 歯学部, 教務職員 (20242216)

Co-Investigator(Kenkyū-buntansha) TAKAHASHI Hidekazu  Tokyo Medical and Dental University, 大学院・医歯学総合研究科, 助教授 (90175430)
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥2,900,000 (Direct Cost: ¥2,900,000)
Fiscal Year 2002: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2001: ¥1,800,000 (Direct Cost: ¥1,800,000)
Keywordsmachinability / composite resin / filler shape / filler contents / machinability test machine / grindings / mechanical properties / Dentin / マルテンス引掻硬さ
Research Abstract

The purpose of this study was to develop a new composite resin what has the same machinability with human dentin. Bis-GMA based resin was used for matrix resin. Two types of spherical-shaped fillers with average particle sizes of 0.2 and 4.3μm, and one type of irregular-shaped hybrid filler with average particle sizes of 6.6μm were selected.Silanized filler loadings were 50 mass % and 80 mass%. Bar-shaped specimens, 3x3x25 mm, of composites were prepared. The machinability was evaluated as a volumetric grinding amount after a machinability test at a 40-gf load.
The grinding amount of composite resin using the spherical-shaped filler with average particle sizes of 4.3μm was greater than those using the irregular-shaped hybrid filler. The composite resin using small spherical-shaped filler was the lowest grinding amount among the composite resins using in this study. The grinding amounts were greater when the filler content was higher.
The grinding amount of the composite resin included 50 mass % small sphericalshaped filler was the lowest, and similar to that of dentin. Although the machinability of composite resins were similar to that of dentin, mechanical properties of these composite resins show low ability. Improvements of composite resin properties must be done for core build-up usage.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] 岩崎直彦 ほか: "コンポジットレジンのフィラー形状が被削性に及ぼす影響"歯科材料・器械. 21(特39). 141 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 岩崎直彦 ほか: "市販支台築造用コンポジットレジンの被削性について"歯科材料・器械. 21(特40). 127 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 岩崎直彦 ほか: "象牙質に近似した被削性を持つコンポジットレジンの開発"口腔病学会誌. 70(2). (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Iwasaki N, et al.: "The effects of filler shape and filler contents for the machinability of composite resins"Transaction of 4th International Congress on Dental Materials. 328 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 岩崎直彦 ほか: "Bis-GMA系レジンを用いたコンポジットレジンにおけるk被削性に及ぼすフィラー形状及びフィラー含有量の影響"歯科材料・器械. 22(3). (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Iwasaki N, et al: "The relationship between the filler shape and the machinability of composite resins"The journal of the Japanese Society for Dental Materials and Devices. 21(special 39). 141 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Iwasaki N, et al: "The machinability of commercial composite resins for core built-up"The journal of the Japanese Society for Dental Materials and Devices. 21(special 40). 127 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Iwasaki N, et al: "Development of new composite resins with similar machinability of dentin"The journal of the stomatological society. 70(2). (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Iwasaki N, et al: "The effect of filler shape and filler contents for the machinability of composite resins"Transaction of 4^<th> International Congress on Dental Materials. 328. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Iwasaki N, et al: "The effect of filler shape and filler contents for the machinability of Bis-GMA based composite resins"The journal of the Japanese Society for Dental Materials and Devices. 22(3). (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 岩崎直彦, ほか: "コンポジットレジンのフィラー形状が被削性に及ぼす影響"歯科材料・器械. 21(特39). 141 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 岩崎直彦, ほか: "市販支台築造用コンポジットレジンの被削性について"歯科材料・器械. 21(特40). 127 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 岩崎直彦, ほか: "象牙質に近似した被削性を持つコンポジットレジンの開発"口腔病学会誌. 70(2). 328 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Iwasaki N, et al.: "The effects of filler shape and filler contents for the machinability of composite resins"Transaction of 4th InternationalCongress on Dental Materials. 46 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 岩崎直彦 ほか: "Bis-GMA系レジンを用いたコンポジットレジンにおけるk被削性に及ぼすフィラー形状及びフィラー含有量の影響"歯科材料・器械. 22(3). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 岩崎直彦, 高橋英和, 他: "コンポジットレジンのフィラー形状が被削性に及ぼす影響"歯科材料・器械. 21(539). (2002)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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