PURPOSE. Translucency of all-ceramic restorations is an important factor which affects the final appearance and esthetic outcome of the restoration. The aim of this study was to evaluate the effect of the shade of coloring liquid on the translucency of zirconia framework. MATERIALS AND METHODS. Thir...
PURPOSE. Translucency of all-ceramic restorations is an important factor which affects the final appearance and esthetic outcome of the restoration. The aim of this study was to evaluate the effect of the shade of coloring liquid on the translucency of zirconia framework. MATERIALS AND METHODS. Thirty zirconium oxide core plate ($15{\times}12{\times}0.5$ mm) were divided into 6 groups of 5 plates each. Each group was classified according to the shade of coloring liquid based on Vita Classic Scale (A2, A3, B1, C2, and D2), and each sample was immersed in coloring liquid for 3 seconds as recommended by the manufacturer, except for the control group. Contrast ratio, as a translucency parameter, was calculated using a spectrophotometer and the data were analyzed with oneway analysis of variance (ANOVA) and Tukey's honestly significant differences (HSD) tests (${\alpha}$=.05). RESULTS. Significant differences in translucency among the control and test groups, and the B1 shaded group and other shades was observed. There were no significant differences among A2, A3, C2, and D2 shaded groups. CONCLUSION. The translucency of the zirconium oxide cores was affected by the coloring procedure and significant differences in the translucency measurements were identified between specific shades.
PURPOSE. Translucency of all-ceramic restorations is an important factor which affects the final appearance and esthetic outcome of the restoration. The aim of this study was to evaluate the effect of the shade of coloring liquid on the translucency of zirconia framework. MATERIALS AND METHODS. Thirty zirconium oxide core plate ($15{\times}12{\times}0.5$ mm) were divided into 6 groups of 5 plates each. Each group was classified according to the shade of coloring liquid based on Vita Classic Scale (A2, A3, B1, C2, and D2), and each sample was immersed in coloring liquid for 3 seconds as recommended by the manufacturer, except for the control group. Contrast ratio, as a translucency parameter, was calculated using a spectrophotometer and the data were analyzed with oneway analysis of variance (ANOVA) and Tukey's honestly significant differences (HSD) tests (${\alpha}$=.05). RESULTS. Significant differences in translucency among the control and test groups, and the B1 shaded group and other shades was observed. There were no significant differences among A2, A3, C2, and D2 shaded groups. CONCLUSION. The translucency of the zirconium oxide cores was affected by the coloring procedure and significant differences in the translucency measurements were identified between specific shades.
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문제 정의
The aim of this study was to evaluate the effect of the shade of coloring liquid on the translucency of zirconia framework. The null hypothesis to be tested was that there are not any significant differences in translucency among zirconia core ceramics colored with different shades of coloring liquid.
The effect of the different shade of coloring liquid applications on the translucency of zirconia frameworks was evaluated in this study. The null hypothesis that different shades of coloring liquids would not affect the translucency of zirconia frameworks was rejected.
제안 방법
17 evaluated and compared the translucency of structurally different all-ceramic frameworks with clinically recommended thicknesses. The researchers used a spectrophotometer to determine the contrast ratio (CR) in order to evaluate the translucency of these specimens. In their study, In-Ceram Zirconia specimens showed similar opacities to the metal-ceramic specimens, with a value of 1.
The samples were divided into 6 groups of 5 samples each, and each test group was colored with different shades of coloring liquid (Color Liquid for ICE Zirkon, Zirkonzahn GmbH, Gais, Italy, Lot: CB0382B, CB00025B, CA9257A, CB0242B, CB0254B) according to the Vita Classic Scale: A2, A3, B1, C2, and D2 (Vita Zahnfabrik, H Rauter GmbH & Co., Bad Sackingen, Germany).
데이터처리
The obtained data were analyzed by using the one-way ANOVA and Tukey’s HSD tests for pairwise comparisons among the groups (α=.05).
성능/효과
5 mm) from the present study. It could be concluded that the clinically recommended thicknesses of the IPS Empress 2 and zirconia frameworks had the same translucency values when the colorless zirconia framework was used.
The null hypothesis that different shades of coloring liquids would not affect the translucency of zirconia frameworks was rejected. The results in this study showed that coloring liquids could affect the translucency of zirconia frameworks.
00. When the results of present study are compared with the findings of that study, the CR value of the zirconia-ceramic is lower than the metalceramic, which explains why the zirconia restorations are so similar to natural teeth.
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