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Effect of resin shades on opacity of ceramic veneers and polymerization efficiency through ceramics.
- Source :
-
Journal of dentistry [J Dent] 2013 Nov; Vol. 41 Suppl 5, pp. e8-14. Date of Electronic Publication: 2013 Jun 11. - Publication Year :
- 2013
-
Abstract
- Objectives: 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.<br />Methods: 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).<br />Results: 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).<br />Conclusions: 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.<br /> (Copyright © 2013 Elsevier Ltd. All rights reserved.)
- Subjects :
- Aluminum Silicates chemistry
Ceramics chemistry
Color
Colorimetry methods
Elastic Modulus
Elasticity
Hardness
Humans
Light
Methacrylates chemistry
Polymerization
Spectrophotometry methods
Stress, Mechanical
Surface Properties
Dental Porcelain chemistry
Dental Veneers
Light-Curing of Dental Adhesives methods
Resin Cements chemistry
Subjects
Details
- Language :
- English
- ISSN :
- 1879-176X
- Volume :
- 41 Suppl 5
- Database :
- MEDLINE
- Journal :
- Journal of dentistry
- Publication Type :
- Academic Journal
- Accession number :
- 23770386
- Full Text :
- https://doi.org/10.1016/j.jdent.2013.06.001