期刊
ODONTOLOGY
卷 103, 期 2, 页码 160-168出版社
SPRINGER
DOI: 10.1007/s10266-014-0153-6
关键词
Composite; Resin; Degree of conversion; Water sorption; Mechanical property
资金
- CAPES (Coordination for Enhancement of Higher Education Personnel) [PNPD-CAPES 02436/09-4]
This study evaluated the effect of the combination of two dimethacrylate-based monomers [bisphenol A diglycidyl dimethacrylate (BisGMA) or bisphenol A ethoxylated dimethacrylate (BisEMA)] with diluents either derived from ethylene glycol dimethacrylate (ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, triethylene glycol dimethacrylate, tetraethylene glycol dimethacrylate) or 1,10-decanediol dimethacrylate (D(3)MA) on network characteristics and mechanical properties of neat resin and composite materials. The degree of conversion, maximum rate of polymerization and water sorption/solubility of unfilled resins and the flexural strength and microhardness of composites (after 24 h storage in water and 3 months storage in a 75 vol% ethanol aqueous solution) were evaluated. Data were analyzed with two-way ANOVA and Tukey's test (alpha = 0.05). The higher conversion and lower water sorption presented by BisEMA co-polymers resulted in greater resistance to degradation in ethanol compared with BisGMA-based materials. In general, conversion and mechanical properties were optimized with the use of long-chain dimethacrylate derivatives of ethylene glycol. D(3)MA rendered more hydrophobic materials, but with relatively low conversion and mechanical properties.
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