Abstract
This study evaluated the effect of different ceramic primers and heat treatment of silane coupling agents on bond strength of resin cement to glass ceramic. Five ceramic primers (Clearfil Ceramic Primer/CCP, MonoBond-S, ProSil, RelyX Ceramic Primer and Silano) and one conventional resin cement (RelyX ARC) were tested. Lithium disilicate-based ceramic plates were previously etched with hydrofluoric acid, except for CCP (n = 10). All silane agents were applied to ceramics according to the manufacturer’s instructions and primed ceramics plates were heated (in oven at 100 °C for 1 min) or not before resin cement placement. Dual-cure resin cement was mixed and inserted in tubes (0.75 mm diameter × 1 mm height) that were positioned over primed ceramic surfaces. Micro-shear testing was performed using a universal testing machine. Bond strength data were analyzed using two-way ANOVA and Tukey’s test (5%). Ceramic primer heating did not improve the bond strength of the resin cement to lithium disilicate. Most of ceramic primers did not indicate significant difference in bond strength among them; however, CCP yielded the lowest bond strength among the ceramic primers. In conclusion, when the silane was applied on etched surface the bond strength was higher and heat treatment of silane coupling agents did not affect the bond strength.
Highlights
The silicon tetrahydride or silanes is an inorganic colourless gas with spontaneous combustion in air at room temperature [1,2,3]
To optimize the adhesion between lithium disilicate-based ceramic and resin cement, this study evaluated the influence of different silane coupling agents and post-silanization heat treatments
The ceramic plates were randomly divided into ten experimental groups (n = 10) according to the ceramic primer treatments and five commercial silane coupling agents
Summary
The silicon tetrahydride or silanes is an inorganic colourless gas with spontaneous combustion in air at room temperature [1,2,3]. Silane coupling agents have been applied to bond glass and carbon fibers to polymer matrices, creating a strong adhesion of fibers and filler particles to the polymer matrix [4, 5]. In Dentistry, silane coupling agents is applied to bond filler particles to resin monomers of restorative composites and to prepare all-ceramic restorations for adhesive cementation [6]. Aguiar et al Appl Adhes Sci (2016) 4:20 compatible and dispersible in the organic polymers. It improves the strength and wear of dental restorative composites [4]. Considering the dental ceramic materials, silane coupling agents or ceramic primers provides stable and high bond strengths between the resin cement and ceramic, resulting in properly clinical longevity of indirect restoration [7,8,9]
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