[Study on the color modification buring surface staining of PLAT castable ceramic restorations].
The surface staining of castable ceramic restorations is a technique-dependent process. So it is inevitable that the color of restorations mismatch the color of natural teeth. This study was conducted to explore the possibility of modifying the color by selected use of special colored stains. Eighty PLAT castable ceramic samples were machined, 16 mm in diameter, 1.2 mm in thickness. Thirty-two samples were stained with yellow stain and 32 samples orange. Sixteen samples were stained with red, green, blue and violet stains, respectively. To the yellow and orange stained samples, we applied correspondingly the same stain, red, green, blue and violet stains. The color of each sample was evaluated with a colorimeter and translated to Munsell notations. The results indicated that chroma was intensified by each application of the same stain. Red and green stains made the hue reddish and greenish. Blue and violet stains could effectively decrease the chroma of yellow or orange. Meanwhile, the hue was also slightly changed to greenish and reddish.
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D002516:Ceramics; D003116:Color; D004396:Coloring Agents; D003735:Dental Casting Technique; D003793:Dental Restoration, Permanent
D004396:Coloring Agents