Mechanical properties, water sorption characteristics, and compound release of grape seed extract-incorporated resins
AuthorEpasinghe, DJ; Yiu, CKY; Burrow, MF
Source TitleJournal of Applied Oral Science
PublisherUNIV SAO PAULO FAC ODONTOLOGIA BAURU
University of Melbourne Author/sBurrow, Michael
AffiliationMelbourne Dental School
Document TypeJournal Article
CitationsEpasinghe, D. J., Yiu, C. K. Y. & Burrow, M. F. (2017). Mechanical properties, water sorption characteristics, and compound release of grape seed extract-incorporated resins. JOURNAL OF APPLIED ORAL SCIENCE, 25 (4), pp.412-419. https://doi.org/10.1590/1678-7757-2016-0448.
Access StatusOpen Access
Objective: This study evaluated the effect of grape seed extract (GSE) incorporation on the mechanical properties, water sorption, solubility, and GSE release from the experimental adhesive resins. Material and Methods: An experimental comonomer mixture, consisting of 40% Bis-GMA, 30% Bis MP, 28% HEMA, 0.26% camphorquinone and 1% EDMAB, was used to prepare four GSE-incorporated adhesive resins at concentrations of 0.5, 1, 1.5, and 2 wt%. The neat resin without GSE was used as the control. Six resin beams (25 mm x 2 mm x 2 mm) per group were prepared for flexural strength and modulus of elasticity evaluations using a universal testing machine at a crosshead speed of 1 mm/min. Five disks (6 mm in diameter and 2 mm in thickness) per group were used for microhardness measurements using a Leitz micro-hardness tester with Leica Qgo software. Five disks (7 mm in diameter and 2 mm in thickness) per group were prepared and stored in deionized water for 28 days. Water sorption, solubility, and GSE release in deionized water were calculated for each GSE-incorporated adhesive at the end of 28th day. Data was evaluated using one-way ANOVA and Tukey multiple comparisons. Results: Flexural strength, modulus of elasticity and microhardness of GSE-incorporated adhesive decreased significantly with incorporation of 1.5% of GSE (p<0.05). Addition of GSE had no effect on the water sorption of the adhesive resins (p=0.33). The solubility of the resin also increased significantly with incorporation of 1.5% of GSE (p<0.05). Quantities of GSE release increased with increased concentration of GSE in the adhesive resin. Conclusion: Up to 1% of GSE can be incorporated into a dental adhesive resin without interfering with the mechanical properties or solubility of the resins.
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