10.6084/m9.figshare.6235664.v1
Natasha Lamego Brandão
Natasha Lamego
Brandão
Maristela Barbosa Portela
Maristela Barbosa
Portela
Luciane Cople Maia
Luciane Cople
Maia
Andréa Antônio
Andréa
Antônio
Vanessa Loureiro Moreira e Silva
Vanessa Loureiro Moreira e
Silva
Eduardo Moreira da Silva
Eduardo Moreira da
Silva
Model resin composites incorporating ZnO-NP: activity against S. mutans and physicochemical properties characterization
SciELO journals
2018
Resin composite
Zinc oxide
Nanoparticles
S. mutans
Physicochemical properties
2018-05-09 05:56:17
Dataset
https://scielo.figshare.com/articles/dataset/Model_resin_composites_incorporating_ZnO-NP_activity_against_S_mutans_and_physicochemical_properties_characterization/6235664
<div><p>Abstract Although resin composites are widely used in the clinical practice, the development of recurrent caries at composite-tooth interface still remains as one of the principal shortcomings to be overcome in this field. Objectives To evaluate the activity against S. mutans biofilm of model resin composites incorporating different concentrations of ZnO-nanoparticles (ZnO-NP) and characterize their physicochemical properties. Materials and Methods Different concentrations of ZnO-NP (wt.%): E1=0, E2=0.5, E3=1, E4=2, E5=5 and E6=10 were incorporated into a model resin composite consisting of Bis-GMA-TEGDMA and barium borosilicate particles. The activity against S. mutans biofilm was evaluated by metabolic activity and lactic acid production. The following physicochemical properties were characterized: degree of conversion (DC%), flexural strength (FS), elastic modulus (EM), hardness (KHN), water sorption (Wsp), water solubility (Wsl) and translucency (TP). Results E3, E4, E5 and E6 decreased the biofilm metabolic activity and E5 and E6 decreased the lactic acid production (p<0.05). E6 presented the lowest DC% (p<0.05). No significant difference in FS and EM was found for all resin composites (p>0.05). E5 and E6 presented the lowest values of KHN (p<0.05). E6 presented a higher Wsp than E1 (p<0.05) and the highest Wsl (p<0.05). The translucency significantly decreased as the ZnO- NP concentration increased (p<0.05). Conclusions The incorporation of 2 – 5 wt.% of ZnO-NP could endow antibacterial activity to resin composites, without jeopardizing their physicochemical properties.</p></div>