Correlation of filler content and elastic properties of resin-composites
| Autor: | Nick Silikas, David C. Watts, Konstantinos Masouras |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2008 |
| Předmět: |
Aggregate modulus
Modulus Young's modulus Polyethylene Glycols Shear modulus Zirconium [chemistry] Materials Testing Bisphenol A-Glycidyl Methacrylate General Materials Science Composite material Silicon Dioxide [chemistry] Titanium Poisson's ratio Silicon Dioxide Methacrylates [chemistry] Mechanics of Materials Tangent modulus symbols Nanohybrid Methacrylates Materials science Filler volume-fraction Polymethacrylic Acids [chemistry] Surface Properties Bisphenol A-Glycidyl Methacrylate [chemistry] Polyethylene Glycols [chemistry] Nanofillers Composite Resins Dental Materials symbols.namesake Polymethacrylic Acids Materials Science(all) Humans Resin-composites Bulk modulus General Dentistry Elastic modulus Dental Materials [chemistry] Dentistry(all) Glass [chemistry] Composite Resins [chemistry] Elasticity Glass Zirconium Titanium [chemistry] |
| Zdroj: | Masouras, K, Silikas, N & Watts, D C 2008, ' Correlation of filler content and elastic properties of resin-composites ', Dental Materials, vol. 24, no. 7, pp. 932-939 . https://doi.org/10.1016/j.dental.2007.11.007 |
| DOI: | 10.1016/j.dental.2007.11.007 |
| Popis: | Objectives The aim was to determine the Young's modulus ( E ), bulk modulus ( B ), shear modulus ( G ) and Poisson's ratio ( ν ) of a series of composite restorative materials and to correlate them with their filler volume-fractions. Methods Twelve model resin-composite formulations, with systematically varied volume-fraction (Tokuyama), a flowable resin-composite (Point 4 flowable, Kerr) and two hybrid resin-composites (Filtek Supreme XT, 3M-Espe & X-tra Fil, Voco) were investigated. Twelve cylindrical specimens (5 mm × 6 mm) were prepared from each material. Six were free to expand radially under axial compressive loading, and were used to calculate the Young's modulus ( E ). The other six were radially constricted in a rigid stainless steel ring during loading, from which the bulk modulus ( B ) was calculated. Compression loading was performed at 1 mm/min. The Young's and bulk moduli were determined using equations of elasticity. Poisson's ratio from ν = 0.5 − ( E /6 B ) and shear modulus from G = E /2(1 + ν ). Results Young's moduli ranged from 2.19 to 7.15 GPa, bulk moduli from 12.79 to 22.43 GPa and shear moduli from 0.74 to 2.47 GPa. Poisson's ratio ranged from 0.45 for the stiffer to 0.47 for the more compliant composites. Statistically significant differences (ANOVA and Bonferroni at p = 0.05) were found depending on filler volume-fraction. Significance Elastic moduli varied significantly and a positive correlation existed between elastic moduli and filler volume-fraction ( r 2 : 0.905–0.992 and 0.940–1.000 for Young's and bulk moduli, respectively). |
| Databáze: | OpenAIRE |
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