オールセラミッククラウンの色調発現に層構成が及ぼす影響  [in Japanese] The Influence of the Porcelain Layering on the Color of All Ceramic Crowns  [in Japanese]

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Author(s)

    • 斎藤 脩 SAITO Osamu
    • 大阪大学歯学部歯科補綴学第一講座 Department of Fixed Prosthodontics, Osaka University Faculty of Dentistry
    • 丸山 剛郎 MARUYAMA Takao
    • 大阪大学歯学部歯科補綴学第一講座 Department of Fixed Prosthodontics, Osaka University Faculty of Dentistry

Abstract

The purpose of this study was to fabricate all-ceramic crbwn with a target color. The color of all-ceramic crown was analyzed by measuring the color of all-ceramic specimens made by the refractory model technique (G-Cera), and lost wax technique (IPS Empress). The ceramometal specimen was used for the target color. The color of all-ceramic specimens was measured with a small area colorimeter by translucent and reflecting methods and evaluated by the CIE L<SUP>*</SUP> a<SUP>*</SUP> b<SUP>*</SUP> color system.<BR>The results were as follows:<BR>1. The color of each system was different, though the same shade of porcelain was used. Both systems showed lower L<SUP>*</SUP> and higher b<SUP>*</SUP> than the target color.<BR>2. The layer of enamel porcelain had an influence on the L* value, and the layer of dentine porcelain had an influence on the L<SUP>*</SUP> and b<SUP>*</SUP> values.<BR>3. The system using the layering technique had greater changeability of colors than the system using the lost wax technique.<BR>4. It can be concluded that the luminous value must be adjusted after reproducing the yellowness to fabricate all-ceramic crown with the target color.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 42(3), 402-408, 1998-06-10

    Japan Prosthodontic Society

References:  18

Cited by:  7

Codes

  • NII Article ID (NAID)
    10008169644
  • 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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