The effect of silanization and filler fraction on the mechanical properties of aged dental composites was investigated. Experimental composites (75/25 Bis-GMA/TEGDMA resin reinforced with 0, 12.6, 30.0, and 56.5 vol% 8 microm silanized/unsilanized BaSiO6) were fabricated into 4.7 mm diameter x 2.2 mm thick discs and 3.5 mm diameter x 7.3 mm thick discs for diametral tensile and compressive tests, respectively. The effect of immersion in 75% ethanol at 37 degrees C for 0-30 days on the diametral tensile strength (DTS) and compressive strength (CS) of the samples was evaluated and analysed by ANOVA and Tukey LSD test. The fracture interface between filler and resin matrix was then examined by scanning electron microscope. Results and subsequent statistical evidence from DTS (18.6+/-7.6 MPa, silanized versus 11.7+/-2.6 MPa, unsilanized) and CS (85.1+/-29.7 MPa, silanized versus 56.0+/-11.3 MPa, unsilanized) strongly implies that silanization may greatly enhance the mechanical properties of the resin composites. Furthermore, it also shows that both DTS and CS increased proportionally as the filler fraction of the composites increased. However, in the unsilanized groups, DTS decreased (up to 40%) as the filler fraction increased, and CS showed no relevance to the filler fraction at all. As for the influence of aging, it was found that both DTS and CS showed a significant decrease after immersion in 75% ethanol, and silanization heavily correlated with the filler fraction of aged-resin composites. Microscopic examination of the fractured samples showed that failure primarily occurred within the resin matrix per se for silanized composites and adjacent to the filler particles for unsilanized composites. All the evidence points to the conclusion that mechanical properties of aged-resin composites can be greatly influenced by silanization and the filler fraction.
The effect of silanization and filler frac-that silanization may greatly enhance the mechanical properties of the resin composites. Furthermore, tion on the mechnical properties of aged dental it also shows that both DTS and CS increased pro-composites was investigated. Experimental comportionally as the filler fraction of the composites posites (75/25 Bis-GMA/TEGDMA resin reinforced with 0, 12·6, 30·0, and 56·5 vol% 8 mm silanized/unsi-increased. However, in the unsilanized groups, DTS lanized BaSiO 6 ) were fabricated into 4·7 mm diame-decreased (up to 40%) as the filler fraction increased, and CS showed no relevance to the filler ter×2·2 mm thick discs and 3·5 mm diameter fraction at all. As for the influence of aging, it was ×7·3 mm thick discs for diametral tensile and com- found that both DTS and CS showed a significant pressive tests, respectively. The effect of immersion decrease after immersion in 75% ethanol, and in 75% ethanol at 37°C for 0-30 days on the diamesilanization heavily correlated with the filler frac-tral tensile strength (DTS) and compressive tion of aged-resin composites. Microscopic exami-strength (CS) of the samples was evaluated and analysed by ANOVA and Tukey LSD test. The frac-nation of the fractured samples showed that failure ture interface between filler and resin matrix was primarily occurred within the resin matrix per se for silanized composites and adjacent to the filler parti-then examined by scanning electron microscope. Results and subsequent statistical evidence from cles for unsilanized composites. All the evidence points to the conclusion that mechanical properties DTS (18·69 7·6 MPa, silanized versus 11·7 92·6 MPa, unsilanized) and CS (85·1 929·7 MPa, silanized ver-of aged-resin composites can be greatly influenced sus 56·0 911·3 MPa, unsilanized) strongly implies by silanization and the filler fraction.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.