Optimizing glass-ceramic bonding incorporating new silane technology in an experimental universal adhesive formulation

Abstract Objective Incorporating silane-coupling agent into universal adhesives (UAs) to simplify adhesive luting of glass-ceramic restorations appeared ineffective due silane’s instability in an acidic aqueous solution. This study aimed evaluate new silane technology added experimental UA be bonded glass ceramics without separate prior silanization. Methods Combined technology, consisting 3-(aminopropyl)triethoxysilane (APTES) and γ-methacryloxypropyltriethoxysilane (γMPTES), was incorporated formulation, being referred as ADH-XTE (3M Oral Care). Immediate aged shear bond strength (SBS) onto as-milled (‘AM’), tribochemical silica-coated (‘TSC’), HF-etched (‘HF’), mirror-polished (‘MP’) CAD/CAM blocks (IPS e.max CAD) with/without silanization measured (n = 10/group). The control included Scotchbond Universal (‘SBU’) 1 XT (‘SB1-XT’). surface topography the fractography SBS-debonded specimens were observed by SEM. Results Without silanization, ADH-XTE, containing combined APTES/γMPTES significantly outperformed bonding efficiency its silane-containing SBU precursor, while it performed equally effective applied with Upon aging, significant reduction SBS recorded when TSC surfaces (p Significance capacity surpassed that precursor. HF etching remains needed durably glass-ceramics.