Öztürk Elif, Chiang Yu-Chih, Coşgun Erdal, Bolay Şükran, Hickel Reinhard, Ilie Nicoleta
Hacettepe University, Faculty of Dentistry, Department of Restorative Dentistry, Sıhhiye, 06100 Ankara, Turkey.
J Dent. 2013 Nov;41 Suppl 5:e8-14. doi: 10.1016/j.jdent.2013.06.001. Epub 2013 Jun 11.
The aim of this study was to assess the effect of different resin cement shades on the opacity and color difference of ceramics and to determine the polymerization efficiency of the resin cement at different shades after curing through ceramics.
Two different ceramics (IPS e.max Press and IPS Empress(®)CAD, Ivoclar Vivadent) were used for this study. A light-cured veneer luting resin (Variolink Veneer, Ivoclar Vivadent) in four different shades of HV+1, HV+3, LV-1, and LV-3 was used for the colorimetric measurements. The color and spectral reflectance of the ceramics were measured according to the CIELab color scale relative to the standard illuminant D65 on a reflection spectrophotometer (ColorEye7000A, USA). Color differences (ΔE values) and the contrast ratios (CR) of the different groups of samples were calculated. In order to analyse the polymerization efficiency of the resin cements, the micromechanical properties of the resins were measured with an automatic microhardness indenter (Fisherscope H100C, Germany). The results were analysed using one-way ANOVA and Tukey's HSD post hoc tests (SPSS 18.0).
The one-way ANOVA test showed that the values of ΔE and CR of the different specimen groups were significantly different (p<0.05). Group 1 (20.7 ± 0.5) (IPS-CAD without resin cement) exhibited the highest and group 10 (14.8 ± 0.5) (e.max:HV+3) exhibited the lowest ΔE value. Significant differences in the micromechanical properties were identified among the tested resin cements in different shades (p<0.05).
Resin cement shade is an important factor for the opacity of a restoration. Furthermore, the resin shade affects the micromechanical properties of the underlying resin cement.
本研究旨在评估不同树脂水门汀颜色对陶瓷透明度和色差的影响，并确定树脂水门汀在透过陶瓷固化后不同颜色下的聚合效率。
本研究使用了两种不同的陶瓷（义获嘉e.max Press和义获嘉全瓷冠（®）CAD，义获嘉伟瓦登特公司）。使用一种光固化贴面粘结树脂（Variolink Veneer，义获嘉伟瓦登特公司）的四种不同颜色（HV+1、HV+3、LV-1和LV-3）进行比色测量。在反射分光光度计（ColorEye7000A，美国）上，根据相对于标准照明体D65的CIELab色标测量陶瓷的颜色和光谱反射率。计算不同组样品的色差（ΔE值）和对比度（CR）。为了分析树脂水门汀的聚合效率，使用自动显微硬度压头（Fisherscope H100C，德国）测量树脂的微观力学性能。使用单因素方差分析和Tukey's HSD事后检验（SPSS 18.0）分析结果。
单因素方差分析表明，不同试样组的ΔE值和CR值存在显著差异（p<0.05）。第1组（20.7±0.5）（未使用树脂水门汀的IPS-CAD）的ΔE值最高，第10组（14.8±0.5）（e.max:HV+3）的ΔE值最低。不同颜色的测试树脂水门汀的微观力学性能存在显著差异（p<0.05）。
树脂水门汀颜色是修复体透明度的重要因素。此外，树脂颜色会影响底层树脂水门汀的微观力学性能。
