Physical and mechanical properties of an experimental dental composite based on a new monomer

Dental Materials : Official Publication of the Academy of Dental Materials
Mohammad AtaiS Amani

Abstract

The purpose of this study was to investigate the physical and mechanical properties of a dental composite based on BTDMA, a new dimethacrylate monomer based on BTDA (3,3',4,4'-benzophenone tetracarboxylic dianhydride), and to compare these with the properties of a composite based on commonly used Bis-GMA monomer. Experimental composites were prepared by mixing the silane-treated filler with the monomers. The prepared pastes were inserted into the test molds and heat-cured. Light-cured composites were also prepared using camphorquinone and amine as photoinitiator system. Degree of conversion of the light-cured and heat-cured composites was measured using FTIR spectroscopy. The flexural strength, flexural modulus, diametral tensile strength (DTS), water sorption, water contact angle, microhardness and thermal expansion coefficient of the prepared composites were measured and compared. Water uptake of the monomers was also measured. The results showed that the mechanical properties of the new composite are comparable with the properties of the Bis-GMA-based composite but its water sorption is higher. BTDMA as a monomer containing aromatic rings and carboxylic acid groups in its structure gives a composite with good mechanical prop...Continue Reading

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Citations

Jul 21, 2009·Lasers in Medical Science·Seyyed Shahabeddin MirsasaaniMohammad M Hasani-Sadrabadi
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Dec 6, 2011·Dental Materials : Official Publication of the Academy of Dental Materials·Mohammad AtaiNiloofar Moin
Feb 16, 2010·Dental Materials : Official Publication of the Academy of Dental Materials·Mehdi Sadat-ShojaiLeila Nasiri Khanlar
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