Effect of Low Shrinkage Monomers on Physicochemical Properties of Dental Resin Composites

Brazilian Dental Journal

Dayane Carvalho Ramos Salles De Oliveira¹  Karla Rovaris¹  Viviane Hass¹  Eduardo José Souza-júnior¹  Francisco Haiter-neto¹  Mario Alexandre Coelho Sinhoreti¹ 

关键词: degree of conversion;    Young modulus;    flexural strength;    shrinkage;   

DOI  :  10.1590/0103-6440201300401

来源: SciELO

【 摘 要 】

The aim of this study was to evaluate the effect of low shrinkage monomers on physicochemical properties of dental resin composites. Two low shrinkage resin composites: one with a crosslink branching monomer (Kalore, GC Corp) and a novel monomer (Venus Diamond, Heraeus Kulzer) were compared to a conventional resin composite formulation (Filtek Z250, 3M/ESPE). The volumetric shrinkage was evaluated by µCT analysis (n=5) and the physicochemical properties by degree of C=C conversion (DC), flexural strength (FS) and Young's modulus (YM) (n=10). All samples were light cured by a LED device (Radii, SDI) with 16 J/cm2. The results were analysed by one-way ANOVA and Tukey test for multiple comparisons (α=0.05). No statistical difference was found between µCT shrinkage values to Kalore (1.8%) and Venus Diamond (1.7%) (p≥0.05); Z250 presented statistical highest shrinkage value (2.0%). Kalore presented higher statistical DC (60.8%) than Venus Diamond (49.5%) and Z250 (49.6%). No statistical difference was found between FS or YM properties to Venus Diamond and Z250; Kalore presented statistical lowest FS and YM properties (p≥0.05). Conclusion: Using novel monomers seem to reduce polymerization shrinkage without affecting the physicochemical properties evaluated of resin composites rather than using crosslink branching monomers.

【 授权许可】

CC BY   
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