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KMID : 0362419910290030087
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Journal of Korean Academy of Prosthodontics
1991 Volume.29 No. 3 p.87 ~ p.99
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COLOR STABILITY AND SURFACE TEXTURE TO TEMPERATURE AT STAINING OF PORCELAIN RESTORATION
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Beak Eun-Ju
Song Kwang-Yeob
Park Charn-Woon
Bae Tae-Seong
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Abstract
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The effect oven firing on the color stability and surface texture of extrinsic stains used characterization and color modification of metal cermic restoration were stduied by comparing different temperatures and techniques. They were autoglaze technique, applied glaze technique, two step low-fusing glaze technique and one step low-fusing glaze technique. Autoglaze technique and applied glaze technique were air-fired to manufacturer’s recommended temperature. Two step low-fusing glaze technique is separated staining and overglazing. Thin slurry of stain powder were air-fired to 1500℉. Overglaze powder powder was then mixed with stain medium and air-fired to 170℉. One step low-fusing glaze technique is combined staining and overglazing. Thin slurry of stain and glaze powder were air-fired to 170℉. The obtained results were as follows : 1. Slightly singnificant color differences by colorimeter were found between different stain application and fusion techniques(P<0.05). 2. Two step low-fusing glaze method showed the most rough surface, especially ceramco orage stain(P<0.05). 3. Surface roughness increased gradually in order of autoglaze, applied glaze, one step low-fusing glaze but they were not significantly different(P<0.05). 4. When two step low-fusing glaze was applied, both color measurement and surface texture were sinificantly different from other groups(P<0.05).
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