Objective To evaluate in vitro Streptococcus mutans (S. mutans) biofilm formation on the surface of five light-curing experimental dental bonding systems (DBS) with increasing hydrophilicity. The null hypothesis tested was that resin chemical composition and hydrophilicity does not affect S. mutans biofilm formation. Methods Five light-curing versions of experimental resin blends with increasing hydrophilicity were investigated (R1, R2, R3, R4and R5). R1and R2contained ethoxylated BisGMA/TEGDMA or BisGMA/TEGDMA, respectively, and were very hydrophobic, were representative of pit-and-fissure bonding agents. R3was representative of a typical two-step etch-and-rinse adhesive, while R4and R5were very hydrophilic resins analogous to self-etching adhesives. Twenty-eight disks were prepared for each resin blend. After a 24 h-incubation at 37°C, a multilayer monospecific biofilm of S. mutans was obtained on the surface of each disk. The adherent biomass was determined using the MTT assay and evaluated morphologically with confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM). Results R2and R3surfaces showed the highest biofilm formation while R1and R4showed a similar intermediate biofilm formation. R5was more hydrophilic and acidic and was significantly less colonized than all the other resins. A significant quadratic relationship between biofilm formation and hydrophilicity of the resin blends was found. CLSM and SEM evaluation confirmed MTT assay results.
|Titolo:||Hydrophilicity of dentin bonding systems influences in vitro Streptococcus mutans biofilm formation|
|Parole Chiave:||Dentin bonding systems; Hydrophilicity; Biofilms; Streptococcus mutans|
|Settore Scientifico Disciplinare:||Settore MED/28 - Malattie Odontostomatologiche|
|Data di pubblicazione:||2014|
|Digital Object Identifier (DOI):||10.1016/j.dental.2014.05.009|
|Appare nelle tipologie:||01 - Articolo su periodico|