オールセラミック修復における熱的性質の検討 : オールセラミック材について  [in Japanese] A Study on Thermal Properties of All Ceramic Restorations : All Ceramics  [in Japanese]

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Author(s)

    • 茂呂 祐康 MORO Hiroyasu
    • 日本大学歯学部歯科補綴学教室クラウンブリッジ学講座 Department of Crown and Bridge Prosthodontics, Nihon University School of Dentistry
    • 田村 好之 TAMURA Yoshiyuki
    • 日本大学歯学部歯科補綴学教室クラウンブリッジ学講座 Department of Crown and Bridge Prosthodontics, Nihon University School of Dentistry
    • 五十嵐 孝義 IGARASHI Takayoshi
    • 日本大学歯学部歯科補綴学教室クラウンブリッジ学講座 Department of Crown and Bridge Prosthodontics, Nihon University School of Dentistry

Abstract

This study was conducted to investigate the thermal properties (thermal diffusivity, specific thermal capacity and thermal conductivity) of all ceramic restorative materials. Measurement of thermal properties of IPS Empress<SUP>®</SUP>, DiCOR<SUP>®</SUP> and adhesive resin cement Variolink II were performed by the Xenon flash method. The results obtained were as follows. Thermal diffusivity (×10<SUP>-2</SUP>cm<SUP>2</SUP>s<SUP>-1</SUP>) was 0.372-0.423 for IPS Empress<SUP>®</SUP>, 0.614 for DiCOR<SUP>®</SUP> and 0.191-0.193 for Variolink. Specific thermal capacity (Jg<SUP>-1</SUP>K<SUP>-1</SUP>) ranged from 0.695 to 0.872 for IPS Empress<SUP>®</SUP>, 1.119 for DiCOR<SUP>®</SUP> and 0.733-4.114 for Variolink. Thermal conductivity (Wm<SUP>-1</SUP>K<SUP>-1</SUP>) was 0.644-0.770 for IPS Empress<SUP>®</SUP>, 1.721 for DiCOR<SUP>®</SUP> and 0.297-0.475 for Variolink. Thermal conductivity of IPS Empress<SUP>®</SUP> was found to be less than that of human enamel, while that of DiCOR<SUP>®</SUP> was greater than that of human enamel. Thermal conductivity of Variolink was smaller than those of human enamel and dentin.<BR>The above results indicated that IPS Empress<SUP>®</SUP> had greater thermal insulation capability than human enamel and dentin and that DiCOR<SUP>®</SUP> had less.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 43(6), 1008-1015, 1999-12-10

    Japan Prosthodontic Society

References:  13

Cited by:  2

Codes

  • NII Article ID (NAID)
    10008175069
  • NII NACSIS-CAT ID (NCID)
    AN00197911
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03895386
  • Data Source
    CJP  CJPref  J-STAGE 
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