Titanium dioxide and modified titanium dioxideby silver nanoparticles as an anti biofilm fillercontent for composite resins.
DIAS, Hércules Bezerra; BERNARDI, Maria Inês Basso; BAUAB, Taís Maria; HERNANDES, Antônio Carlos; RASTELLI, Alessandra Nara de Souza.
DIAS, Hércules Bezerra; BERNARDI, Maria Inês Basso; BAUAB, Taís Maria; HERNANDES, Antônio Carlos; RASTELLI, Alessandra Nara de Souza.
 Abstract: Objective. The aim of this study was to evaluate the antibacterial activity of a composite resinmodified by TiO2and TiO2/Ag nanoparticles and their influence over different properties.Methods. TiO2and TiO2/Ag NPs were synthesized by polymeric precursor and microwave-assisted hydrothermal methods and then, characterized by different techniques. Directcontact test was performed using FiltekTMZ350XT blended with 0.5; 1 and 2% (wt.) of NPsagainst Streptococcus mutans to determine the best concentration to the other tests. Afterthat, the modified composite resin was tested against S. mutans 7-day biofilm (CFU/mL).Also, compressive and diametral tensile strength (n = 40), degree of conversion (n = 25) andsurface roughness (n = 50) was performed. The data were analyzed by ANOVA and Tukey?stest for multiple comparison at 5% significance level. Results. The direct contact test demonstrates that by increasing the nanoparticle content,the bacterial growth is significantly reduceed (p < 0.05). The inclusion of 2% of TiO2/Ag NPssignificantly decreased (p < 0.05) the biofilm accumulation of S. mutans on the compositeresin surface compared to the control Group. The TiO2NPs treated with an organosilaneincreased compressive strength of composite resin (p < 0.05). Degree of conversion remainedunchanged (p > 0.05) and the surface roughness increased with the NPs (p < 0.05), except forthe TiO2by polymeric precursor Group (p > 0.05).Significance. The development of an antibacterial dental restorative material that hinder S.mutans biofilm without sacrificing the mechanical and physical properties is desirable indental material science. | |
| Dental Materials |
| v. 35, n. 2, p. e36-e46 - Ano: 2019 |
| Fator de Impacto: 4,039 |
| http:/dx.doi.org/10.1016/j.dental.2018.11.002 |  @article={002925176,author = {DIAS, Hércules Bezerra; BERNARDI, Maria Inês Basso; BAUAB, Taís Maria; HERNANDES, Antônio Carlos; RASTELLI, Alessandra Nara de Souza.},title={Titanium dioxide and modified titanium dioxideby silver nanoparticles as an anti biofilm fillercontent for composite resins},journal={Dental Materials},note={v. 35, n. 2, p. e36-e46},year={2019}} |