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Al-Nasrawi, Suhad
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Publications (3/3 displayed)
- 2021Chemical Characterisation of Silanised Zirconia Nanoparticles and Their Effects on the Properties of PMMA-Zirconia Nanocomposites
- 2021Chemical Characterisation of Silanised Zirconia Nanoparticles and Their Effects on the Properties of PMMA-Zirconia Nanocompositescitations
- 2018Effect of the Composition of CAD/CAM Composite Blocks on Mechanical Propertiescitations
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article
Effect of the Composition of CAD/CAM Composite Blocks on Mechanical Properties
Abstract
The aim of this study was to evaluate the effect of the composition of CAD/CAM blocks on their mechanical properties. Nine different CAD/CAM blocks, enamel and dentine, were tested. Sixteen samples of each material were separated for Vickers microhardness test (n=6, 5 readings per specimen), nanohardness test (n=6, 5 readings per specimen), filler weight (n=3), and SEM imaging (n=1). Data were statistically analysed using one-way ANOVA. Vita Mark II ceramic showed significantly higher values of hardness (in both nano- and microscale) and elastic modulus (6.83 GPa, 502 kg/mm2, and 47.7 GPa), respectively, than other materials. CAD/CAM composite blocks showed comparable values of hardness and elastic modulus to those of dentine but lower than those of enamel and ceramics. SEM images highlighted different filler-matrix microstructure of CAD/CAM composite blocks. It was concluded thathardness and elastic moduli are positively correlated with ceramic filler percentage and microstructure andCAD/CAM composite materials have comparable hardness and elastic moduli to tooth structure.