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KMID : 1035320200470010011
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Korean Society for Dental Materials
2020 Volume.47 No. 1 p.11 ~ p.22
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Effect of coloring and thickness on the color and translucency parameter of translucent zirconia
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Park Mi-Gyoung
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Abstract
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The purpose of this study was to evaluate the effects of coloring and thickness on the color and translucency parameter(TP) of translucent zirconia. Experimental groups of translucent zirconia with thicknesses of 1 and 1.5 mm were preparedand colored with A2, B2, C2 and D2 colorants. Non-shaded zirconia specimens were used as the control group. The colorcoordinates (CIE Lab) of the translucent zirconia specimens, sintered according to the manufacturer’s sintering specification(n=7), were measured using a spectrophotometer (CM-3600A, Konica Minolta, Tokyo, Japan), and the color difference (ΔE*)and TP were calculated. One-way ANOVA and independent sample t-test were used for statistical analysis, and Tukey’s testwas used for post-test. The CIE L* and a* values were significantly decreased, and the CIE b* values were significantly increasedafter coloring the translucent zirconia specimens (p<0.001). With the increase in the thickness of the translucent zirconia coloredwith the same color, the color difference was found to be lower than the clinically recognizable color difference (ΔE=3.7).
As the coloring and thickness were increased, the TP values were reduced in all the specimen groups in a statistically significantmanner (p<0.001). Coloring the translucent zirconia diminished the brightness and resulted in a green/yellow hue. In conclusion,the coloring and thickness affected the translucency parameter of translucent zirconia.
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KEYWORD
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Translucent zirconia, Coloring, Color
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