Effect of curing mode on the conversion and IIT-derived mechanical properties of core build-up resin composites
| Autor: | Spiros Zinelis, M. Anagnostou, Aikaterini Petropoulou, Maria Dimitriadi, Maria Zafiropoulou, George Eliades |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Surface Properties Resin composite Composite number Biomedical Engineering Modulus Composite Resins Degree (temperature) Polymerization Resin Cements Biomaterials Core (optical fiber) Mechanics of Materials Hardness Indentation Materials Testing Composite material Spectroscopy Curing (chemistry) |
| Zdroj: | Journal of the mechanical behavior of biomedical materials. 123 |
| ISSN: | 1878-0180 |
| Popis: | The aim of the study was to evaluate the degree of conversion and the mechanical properties of five composite core build-up materials polymerized in dual-curing and self-curing modes. The materials tested were: Clearfil DC Core Plus (CF), Gradia Core (GC), Luxacore-Z Dual Smartmix (LX), Multicore Flow (MC) and Paracore (PC). Disk-shaped specimens were prepared from each material; half the specimens were light-cured, whereas the rest were only self-cured. After a 3-week storage period (dark/dry/37 °C) the Martens Hardness, Indentation Modulus, and Elastic Index were determined by instrumented indentation testing (IIT), while the degree of conversion was assessed by ATR-FTIR spectroscopy. Statistical analysis was performed by 2-way ANOVA and post-hoc testing (α = 0.05). The dual-curing mode resulted in statistically higher Martens Hardness and Elastic Index than the self-curing mode in most materials but showed insignificant differences in Indentation Modulus. MC and PC demonstrated significantly higher degree of conversion in both curing modes. Overall, the self-curing mode was inferior to the dual-curing in conversion and mechanical properties for most products, despite their differences in monomer composition and filler loading. |
| Databáze: | OpenAIRE |
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