陶材溶着鋳造冠(Ni-Cr系合金)の色調再現性

概要

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This study was made a view to establishing clinical procedures enabling us to make color reproduction of the ceramometal restorations more objectively, using three kinds of porcelain Vita shade guides, two kinds of Ni-Cr ceramo-alloys and two kinds of vacuum-fired porcelains of Vita ceramo-shade, photoelectric colorimetrical measurements were made of the color of commercially available shade guides, which were fundamental in color selection, and then researches were made of possible factors influencing the color in the process of preparing ceramometal restorations, and further more studies were made of the color reproductivity of the finished ceramometal restorations and the above shade guides. The results obtained were follows ; Correlation between the color of shade guides and the shade was observed for x, y value of chromaticity, but not for Y value of lightness. A color difference of 1.9 to 8.4 was observed with reference to the color reproductivity after finishing the fusion of rorcelain and of shade uuides, suuuestinu that the kind of shade guides in color selection, the kind of porcelain at the stage of fusing porcelain and the opaque porcelain thickness had an important significance in the color reproductivity of ceramometal restorations.
社団法人日本補綴歯科学会の論文
1990-10-01