The Journal of Korean Academy of Prosthodontics (대한치과보철학회지)

The Korean Academy of Prosthodonitics (대한치과보철학회)
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AN EXPERIMENTAL STUDY ON COLOR DIFFERENCE BETWEEN PROCELAIN SYSTEMS FOR PORCELAIN-FUSED-TO-METAL CROWN

도재전장 주조관에 사용되는 도재의 색차에 관한 실험적 연구

  • Paik, Sung-Ki (Department of Prosthodontics, College of Dentistry, Seoul National Unviersity) ;
  • Chang, Wan-Shik (Department of Prosthodontics, College of Dentistry, Seoul National Unviersity) ;
  • Yang, Jae-Ho (Department of Prosthodontics, College of Dentistry, Seoul National Unviersity) ;
  • Lee, Sun-Hyung (Department of Prosthodontics, College of Dentistry, Seoul National Unviersity)
  • 백성기 (서울대학교 치과대학 보철학교실) ;
  • 장완식 (서울대학교 치과대학 보철학교실) ;
  • 양재호 (서울대학교 치과대학 보철학교실) ;
  • 이선형 (서울대학교 치과대학 보철학교실)
  • Published : 1987.12.01
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Abstract

The purposes of this study were to evaluate the color differences those can exist between different brands of porcelain with identical shade designation, and to find their causes. For these purposes the following experiments were executed: The color of each opaque and layered porcelain specimen was determined by spectral reflectance measurements with a spectrophotometer. The compositions of each opaque porcelain powder were analyzed by qualitative, and quantitative analysis. Microscopic structures of each opaque porcelain were observed by scanning electron microscope. The results were as follows: 1. Identical shade of different brands of porcelain produced significantly different colors. 2. Color differences among the three brands were found under different light sources. 3. Color differences among the three brands were mostly a result of differences in kinds and amounts of opacifying agents and fluxes and microstructure of porcelain systems. 4. When porcelain systems have similar compositions and firing cycles, they produced similar colors.

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