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KMID : 0362220130400040327
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Journal of The Korean Research Society for Dental Materials
2013 Volume.40 No. 4 p.327 ~ p.334
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The effect of glycerine on the penetration of coloring liquid and the hardness of zirconia
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Park Da-Ryeong
Bae Ji-Myung
Oh Seung-Han
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Abstract
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The purpose of this study was to evaluate the effect of glycerine on the penetration of coloring liquid on zirconia and hardness of zirconia. Three A2 coloring liquids (Prettau Aquarell Colour liquid, D.max coloring liquid, and Bruxzir coloring liquid) were used to perform this study. Glycerine were mixed with each coloring liquid at the ratio of 1 : 1 by volume. The immersion periods of zirconia specimen in the mixing solution were 1, 3, 6, 9, and 12 hrs, respectively. The penetration depth of coloring liquid were measured by vernier calliper. Color characterization of experimental specimen was performed by spectrophotometer, and hardness of the specimen was measured by Vickers hardness tester. From the results of penetration depth measurement, glycerine was supposed to affect the penetration depth of coloring liquid on zirconia regardless of immersion periods. By color analysis, L＊ value of glycerine treated specimen was significantly higher than that of control group(P<0.05), but b＊and ?E＊values of glycerine treated specimen were significantly lower than that of control group regardless of immersion periods(P>0.05). In terms of the results of Vickers hardness test, there were no significant statistical differences between control group and experimental groups. Therefore, glycerine was expected to affect the penetration of coloring liquid on zirconia and the shade of zirconia.
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KEYWORD
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Glycerine, Penetration depth, Hardness, Zirconia, Coloring liquid
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