Effects of ceramic shade and thickness on the micro-mechanical properties of a light-cured resin cement in different shades
| Autor: | Elif Öztürk, Reinhard Hickel, Nicoleta Ilie, Şükran Bolay |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Ceramics
Curing Lights Dental Time Factors Materials science Surface Properties Color Modulus Indentation hardness Polymerization Hardness Elastic Modulus Indentation Materials Testing Humans Ceramic Composite material General Dentistry Curing (chemistry) Light-Curing of Dental Adhesives Moisture Temperature Water General Medicine Dental Porcelain Resin Cements Distilled water Creep visual_art visual_art.visual_art_medium Aluminum Silicates Stress Mechanical |
| Zdroj: | Acta Odontologica Scandinavica. 73:503-507 |
| ISSN: | 1502-3850 0001-6357 |
| Popis: | The aim of this study was to evaluate the micro-mechanical properties of a light-cured resin cement in four different shades when polymerized through a leucite-reinforced glass-ceramic in different shades and thicknesses.A light-cured resin cement in four different shades (HV+1, HV+3, LV-1 and LV-3) was selected for this study. The specimens were cured by using a LED-unit (Bluephase®, IvoclarVivadent) for 20 s under a leucite-reinforced glass-ceramic (IPS Empress® CAD, IvoclarVivadent) in two different shades (A1 and A3) of different thicknesses (1 and 2 mm). Specimens cured directly, without an intermediate ceramic, served as control. The specimens were stored after curing for 24 h at 37°C by maintaining moisture conditions with distilled water. Micro-mechanical properties (indentation modulus, E; Hardness, HV; creep, Cr) of the resin cements were measured with an automatic microhardness indenter (Fisherscope H100C, Germany). Twenty groups were included (n = 3), while 10 measurements were performed on each specimen. Data were statistically analyzed by using one-way ANOVA and Tukey's post-hoc test, as well as a multivariate analysis to test the influence of the study parameters.Significant differences were observed between the micromechanical properties of the tested resin cements (p0.05). The resin cement shade showed the highest effect on the micromechanical properties (Partial-eta squared (ηP(2))-E = 0.45, ηP(2)-HV = 0.59, ηP(2)-Cr = 0.29) of the resin cement, followed by ceramic thickness (ηP(2)-E = 0.38, ηP(2)-HV = 0.3, ηP(2)-Cr = 0.04) and ceramic shade (ηP(2)-E = 0.2, ηP(2)-HV = 0.26).Resin cement shade is an important factor influencing the mechanical properties of the material. Light shades of a resin cement express higher E and HV as well as lower Cr values compared with the darker ones. |
| Databáze: | OpenAIRE |
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