EVALUATION OF ANTIBACTERIAL PROPERTIES AND SHEAR BOND STRENGTH OF ORTHODONTIC COMPOSITES CONTAINING SILVER NANOPARTICLES, TITANIUM DIOXIDE NANOPARTICLES AND FLUORIDE: AN IN VITRO STUDY

ABSTRACT Objective: The study aimed at determining the antibacterial properties of composites containing silver nanoparticles (Ag NPs) or titanium dioxide nanoparticles (TiO2 NPs), and a fluoride-releasing composite against Streptococcus mutans and Lactobacillus acidophilus, and to evaluate the effect on shear bond strength (SBS) of nanoparticles-m

In conservation tillage systems, at least 30% of the soil surface was covered by crop residues which generally contain significant amounts of nitrogen (N).However, little is known about the multi-seasonal recoveries of the N derived from these crop residues in soil-crop systems, notably in northeastern China.In a temperate agro-ecosystem, 15N-label