Bonding Potential of All-in-One Adhesives to Ground Enamel - PDF

The development of dental materials has resulted in the introduction of self-etch, all-in-one adhesive systems that combine etching, priming and bonding into one step.

One-bottle systems are easier to use and handling errors are reputed to be limited. In single-component adhesives acidic monomers, hydrophilic monomers, water and/or organic solvents are combined into one solution. The self-etching mechanism of these systems is based on acidic monomers that are able to partially demineralize and infiltrate the dental hard tissues.

Unlike etch-and-rinse systems, they use the smear layer as a bonding substrate, by incorporating it into the hybrid layer. Post-operative sensitivity, a potential risk related to incomplete resin infiltration, is supposed to be limited. Apart from these attractive advantages, there are still some concerns surrounding one component systems. Selfetch adhesives are less effective in demineralizing the enamel surface in comparison with phosphoric acid, while the acidity of self-etching monomers can be buffered by the mineral components of the smear layer.6 Some studies have reported a limited bonding ability of self-etch adhesives to enamel. 

The clinical success of a restoration depends on the quality and the durability of the adhesion between tooth substrate and the restoration.11 As the literature does not provide conclusive information on the reliability of bond strength to enamel of self-etching adhesives, it seemed of interest to assess the bonding potential of newly introduced one-bottle systems to ground enamel in comparison with an etch-and-rinse adhesive tested as control.