チタン焼付用陶材の破壊靱性,色調と焼成収縮に及ぼす焼成条件の影響  [in Japanese] Influence of Firing Condition for Fracture Toughness, Color Stability and Firing Shrinkage of Porcelain-fused-to-titanium  [in Japanese]

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Author(s)

    • 大津 光寛 OHTSU Mitsuhiro
    • 日本歯科大学歯学部歯科補綴学教室第2講座 Department of Crown and Bridge,The Nippon Dental University, School of Dentistry at Tokyo
    • 新谷 明喜 SHINYA Akiyoshi
    • 日本歯科大学歯学部歯科補綴学教室第2講座 Department of Crown and Bridge,The Nippon Dental University, School of Dentistry at Tokyo
    • 横塚 繁雄 YOKOZUKA Shigeo
    • 日本歯科大学歯学部歯科補綴学教室第2講座 Department of Crown and Bridge,The Nippon Dental University, School of Dentistry at Tokyo

Abstract

An experiment was conducted to determine fracture toughness, color stability, and firing shrinkage of porcelain-fused-to-titanium in relation with firing conditions. Titanium (VT), Duceratin (DD), Titanbond (OT) and Titan (NT) were examined under firing temperatures of 10, 20, and 30°C higher than the reference temperature, respectively, with either 1, 3, or 5 rounds of firing.<BR>The results were as follows:<BR>1. With the rise in firing temperature, the fracture toughness level was decreased in VT and increased in NT, while the level remained constant in DD and OT. Repeat firing also influenced the fracture toughness level, which was reduced in VT and OT with increasing number of firings, though the level remained constant in NT and DD.<BR>2. When the color obtained at the reference firing temperature was regarded as the standard color, the color difference ΔE<SUP>*</SUP> from the standard was observed in all except for VT at 10°C higher than the reference temperature. In addition, when the color obtained by one firing was taken as the standard color, the color difference ΔE* from the standard was recognized in all repeat firings.<BR>3. The degree of linear shrinkage was increased in VT and decreased in NT, with the rise in firing temperature and increasing number of rounds of firing, but it remained constant in DD and OT.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 43(2), 269-278, 1999-04-10

    Japan Prosthodontic Society

References:  25

Cited by:  1

Codes

  • NII Article ID (NAID)
    10008172736
  • 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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