Effect of resin shades on opacity of ceramic veneers and polymerization efficiency through ceramics
| Autor: | Nicoleta Ilie, Şükran Bolay, Yu-Chih Chiang, Elif Öztürk, Erdal Cosgun, Reinhard Hickel |
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| Rok vydání: | 2012 |
| Předmět: |
Ceramics
Materials science Opacity Light Surface Properties medicine.medical_treatment Color Standard illuminant Indentation hardness Polymerization Hardness Elastic Modulus medicine Humans Ceramic Composite material General Dentistry Curing (chemistry) health care economics and organizations Light-Curing of Dental Adhesives Color difference fungi technology industry and agriculture social sciences Dental Porcelain humanities Elasticity Resin Cements Dental Veneers Spectrophotometry visual_art Vickers hardness test visual_art.visual_art_medium Methacrylates Veneer Aluminum Silicates Colorimetry Stress Mechanical |
| Zdroj: | Journal of dentistry. 41 |
| ISSN: | 1879-176X |
| Popis: | 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 (p0.05). 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 (p0.05).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. |
| Databáze: | OpenAIRE |
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