IADR Abstract Archives
Synthesis and Evaluation of Mechanical Properties of Novel Bioactive Fiber-based Dental Composites
Objectives: The objective of this study was to incorporate bioactive glass fibers in the resin matrix and to evaluate the mechanical properties of newly developed material and compared with commercial composite.
Methods: Three experimental photoactivated dental composites were synthesized containing bioactive glass fibers with weight percentage of 0% (CT-UF), 40% (Exp-RBC-40), 50% (Exp-RBC-50) and 60% (Exp-RBC-60), Filtek Z350 3M ESPE, Germany (CT-350) was used as control. After polishing, compressive strength, flexural strength, and Dynamic Mechanical Analysis were performed. The samples (n=10) of compressive strength and flexural strength were tested according to ISO 4049, whereby specimens of Dynamic Mechanical Analysis were evaluated according to ASTM standard D4065-01. The analysis was done at 1 Hz and temperature range was 25oC to 150oC. Data was analysed through SPSS 24 by using one-way ANOVA and post hoc tukey’s test and keeping p-value of ≤ 0.05 as significant.
Results: The CT-350 showed higher mechanical properties compared to experimental composites. Among experimental groups, the highest compressive and flexural strength was shown by Exp-RBC-40 followed by Exp-RBC-50 and Exp-RBC-60 while least compressive strength was shown by CT-UF. In case of Dynamic Mechanical Analysis, CT-UF showed the least storage modulus values which was increased with the addition of fillers (Exp-RBC-40oC while CT-350 had comparatively less value and there was steady increase in all the experimental groups but CT-UF showed abrupt increase after 100oC. There was statistically significant difference between the control and experimental groups.
Conclusions: It was found that with increase in the concentration of bioactive fillers, the mechanical properties reduced, which might be related to agglomeration, uniform distribution of fibrous contents and/or polymerization kinetics. However, the results of Exp-RBC-40 were in acceptable range for clinical applications.
Methods: Three experimental photoactivated dental composites were synthesized containing bioactive glass fibers with weight percentage of 0% (CT-UF), 40% (Exp-RBC-40), 50% (Exp-RBC-50) and 60% (Exp-RBC-60), Filtek Z350 3M ESPE, Germany (CT-350) was used as control. After polishing, compressive strength, flexural strength, and Dynamic Mechanical Analysis were performed. The samples (n=10) of compressive strength and flexural strength were tested according to ISO 4049, whereby specimens of Dynamic Mechanical Analysis were evaluated according to ASTM standard D4065-01. The analysis was done at 1 Hz and temperature range was 25oC to 150oC. Data was analysed through SPSS 24 by using one-way ANOVA and post hoc tukey’s test and keeping p-value of ≤ 0.05 as significant.
Results: The CT-350 showed higher mechanical properties compared to experimental composites. Among experimental groups, the highest compressive and flexural strength was shown by Exp-RBC-40 followed by Exp-RBC-50 and Exp-RBC-60 while least compressive strength was shown by CT-UF. In case of Dynamic Mechanical Analysis, CT-UF showed the least storage modulus values which was increased with the addition of fillers (Exp-RBC-40
Conclusions: It was found that with increase in the concentration of bioactive fillers, the mechanical properties reduced, which might be related to agglomeration, uniform distribution of fibrous contents and/or polymerization kinetics. However, the results of Exp-RBC-40 were in acceptable range for clinical applications.