Effect of surface treatments on the tensile bond strength of repaired water-aged anterior restorative micro-fine hybrid resin composite

Repair bond strength of microhybrid, nanohybrid and nanofilled resin composites: effect of substrate resin type, surface conditioning and ageing

“…Hence, in order to ensure adhesion of a new RBC to an existing one, the surface of the substrate material needs to be activated either by adhesive resins in a chemical way or using other methods that are based on physicochemical conditioning methods. Previous studies reported that due to the reduction of unreacted methacrylate monomers over time in clinical function and the intervention with polishing instruments, repair bond may be impaired [13,14,20,21]. According to the results of this study, in nonaged conditions, the two RBCs used in this study behaved similarly.…”

“…Similarly the exchange of the adherend resin did not have a significant effect on the overall results. On the contrary, Fawzy et al [13] showed in their study that regardless of the use of a low-viscosity resin to promote adhesion, the bond strength did not significantly improve. Also, Boushchlicher et al reported better results with the CoJet system, with or without silane [38].…”

“…Despite the presence of unreacted methacrylate groups after the polymerization, the amount of unsaturated double bonds diminishes with ageing and reduces the resin adhesion potential [10][11][12][13]. Different periods of water storage and thermocycling are some of the methods used to simulate the ageing process of dental materials in in vitro studies [8,9,13].…”

“…Several surface conditioning methods have been recommended to improve the repair bond strength, such as surface roughening with diamond burs, etching with hydrofluoric or phosphoric acid etching, or airborne abrasion with aluminium oxide particles or aluminium oxide particles coated with silica [11,[13][14][15][16][17][18][19][20][21]. Roughening methods provide surface irregularities, promoting micro-mechanical interlocking between the substrate surface and the repair resin, but these procedures are further associated with the application of wetting agents such as silane coupling agents and adhesive resins [17,22].…”

Bond Strength Assessment Between Acrylic Teeth and Acrylic Resin Repairs: Effect of Different Surface Treatments

“…Dentro de los protocolos reportados para la reparación de estas fallas, diferentes métodos de condicionamiento de la superficie han sido descritos con la intención de aumentar la energía de superficie (13). Entre ellos se destacan las alteraciones mecánicas de superficie, incluyendo la asperización con instrumentos de rotación, microabrasión (10, 14-16) y laser (17,18).…”