Raman microscopy evaluation of the preventive effect of a modified orthodontic adhesive with silver nanoparticles on the formation of white spot lesions.

Background: Silver nanoparticles (AgNPs) are an effective antibacterial agent, and their inclusion in orthodontic adhesives has been proposed to prevent white spot lesions (WSLs). The objective of this study was to evaluate by Raman microscopy the preventive effect of an orthodontic adhesive modified with AgNPs on the formation of WSLs.

Material And Methods: AgNPs were added in four concentrations (0.

Influence of different phosphoric acids before application of universal adhesive on the dental enamel.

Background: There are different etching gels available, which have different composition, different pH, and different viscosity, and there is little information in the literature comparing all these products.

Objective: To evaluate the mean microshear bond strength and morphological characteristics of tooth enamel by evaluating different phosphoric acids combined with a universal adhesive system.

Materials And Methods: Eighty-four enamel samples were used, which were divided according to the acid conditioning: G1: Scotchbond Etchant (3M Oral Care), G2: Ultra-Etch (Ultradent), G3: Eco-Etch (IvoclarVivadent), G4: ETCH-37 with BAC (Bisco), G5: Etching gel (Densell), G6: Condac 37 (FGM), and G7: Scotchbond Universal Adhesive (3M Oral Care) in self-etch mode.