高機能金合金焼付用陶材の破壊靱性値に及ぼす焼成回数・焼成温度の影響  [in Japanese] Influence of Firing Times and Temperature on Fracture Toughness of Low-fusing Porcelains for High-functional Gold Alloys  [in Japanese]

Access this Article

Search this Article

Author(s)

    • 今村 健 IMAMURA Takeshi
    • 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

The purpose of this study was to investigate the effects of firing conditions onfracture toughness. Three commercially available porcelains for high functional gold alloys, Carrara (CA), Deguceram Gold (DE) and Duceragold (DU), were used. In experiment 1, fracture toughness was investigated under firing treatment of 1, 3, or 5 times and firing temperatures of 0, 20, and 40°C higher than the manufacturers' standard temperature (CA: 845°C, DE: 780°C, DU: 780°C). In experiment 2, the effects of the mooring procedure on fracture toughness was investigated.<BR>The results were as follows:<BR>1. No difference was observed among fracture toughness of firing times in CA and DU, but fracture toughness wasincreased in DE with repeated firing. The maximum value of fracture toughness was 1.96±0.5 MNm<SUP>-3/2</SUP> in DU with firing treatment of three times and the standard temperature. The minimum value was 1.35±0.12 MNm-3/2 in DE with firing treatment of once and 20°C-higher temperature.<BR>2. There was nodifference between fracture toughness in DE and DU before and after mooring.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 43(2), 355-362, 1999-04-10

    Japan Prosthodontic Society

References:  19

Cited by:  2

Codes

  • NII Article ID (NAID)
    10008173001
  • NII NACSIS-CAT ID (NCID)
    AN00197911
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03895386
  • Data Source
    CJP  CJPref  J-STAGE 
Page Top