Abstract
The aim of this study was to evaluate (a) the reactivity of six universal dental adhesives with polished cobalt-chrome (Co-Cr) alloy and zirconia (3Y-TZP) surfaces; and (b) to assess the shear bond strength (SBS) of a resin composite with polished and alumina-blasted surfaces as mediated by these adhesives. The products tested were Adhese Universal (AD), All-Bond Universal (AB), Clearfill Universal Bond (CB), G-Premio Bond (GP), Prelude One (PO) and Scotchbond Universal (SB). The reactivity on polished substrates was evaluated by reflection infrared microscopy (RFTIRM). The roughness parameters of polished and 50 μm alumina grit-blasted surfaces were assessed by optical profilometry. The SBS of the composite bonded to the substrates treated with each adhesive (n = 10/product) was evaluated after 1 week of storage (H2O/37 °C) by Weibull statistics. Evidence of phosphate interaction with polished substrates was obtained by FTIRM, with higher peaks on the alloy. Alumina-blasting increased all roughness parameters with higher values on the alloy. AD, CB were the strongest (σ0) treatments on alloy surfaces and AD, CB, AB, SB on zirconia. GP was the weakest on both substrates and the least reliable (β) on alloy. On polished alloy GP, PO performed better (σ0), whereas on zirconia there were no significant differences. All adhesives showed more prominent reaction with the Co-Cr alloy than with 3Y-TZP.
Highlights
Universal or multi-mode dental adhesives, the most recent development in the field, are blends of adhesive monomers of mild to moderate acidity, at lower concentration than their “etch and rinse”precursor adhesives, with conventional hydrophobic crosslinking monomers, acid-compatible catalysts and properly selected solvents to provide thin and homogeneous adhesive films [1]
“all-in-one” concept introduced by one-step self-etch adhesives [2], they can adapt to each clinical situation, giving freedom to the clinician [3], while saving time and the need for multiple products in various applications
A significant amount of laboratory testing has been performed on universal adhesives, the majority is focused on the bond strength of these materials with enamel [5,6,7] and dentin [1,8,9]
Summary
Universal or multi-mode dental adhesives, the most recent development in the field, are blends of adhesive monomers of mild to moderate acidity, at lower concentration than their “etch and rinse”. Precursor adhesives, with conventional hydrophobic crosslinking monomers, acid-compatible catalysts and properly selected solvents to provide thin and homogeneous adhesive films [1]. Their main goal is to offer flexibility in the choice of treatment protocols for various substrates. A significant amount of laboratory testing has been performed on universal adhesives, the majority is focused on the bond strength of these materials with enamel [5,6,7] and dentin [1,8,9]. Some studies have been performed on zirconia [13,14,15], considering the long-term reliability problems of adhesive bonding to this material [3], and very few studies have
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
