Effect of surface treatments of laboratory-fabricated composites on the microtensile bond strength to a luting resin cement

Abstract

he purpose of this study was to evaluate the influence of different surface treatments on composite resin on the microtensile bond strength to a luting resin cement. Two laboratory composites for indirect restorations, Solidex and Targis, and a conventional composite, Filtek Z250, were tested. Forty-eight composite resin blocks (5.0 x 5.0 x 5.0mm) were incrementally manufactured, which were randomly divided into six groups, according to the surface treatments: 1-control, 600-grit SiC paper (C); 2-silane priming (SI); 3-sandblasting with 50 µm Al 2 O 3 for 10s (SA); 4-etching with 10% hydrofluoric acid for 60 s (HF); 5-HF + SI; 6 -SA + SI. Composite blocks submitted to similar surface treatments were bonded together with the resin adhesive Single Bond and Rely X luting composite. A 500-g load was applied for 5 minutes and the samples were light-cured for 40s. The bonded blocks were serially sectioned into 3 slabs with 0.9mm of thickness perpendicularly to the bonded interface (n = 12). Slabs were trimmed to a dumbbell shape and tested in tension at 0.5mm/min. For all composites tested, the application of a silane primer after sandblasting provided the highest bond strength means.

Bond strength of self-adhesive resin cements to dry and moist dentin

“…The surface of each disc to be bonded to the prepared tooth was airborne-particle abraded with 50 µm aluminum oxide (Danville Engineering Inc., San Ramon, USA) for 10 s (air pressure: 0.552 MPa; distance from the tip: 1.5 cm), and silanated using coupling agents (Ceramic Primer, 3M ESPE, St. Paul, USA or Clearfil Ceramic Primer, Kuraray Noritake Dental Inc., Kurashiki, Japan), according to the manufacturer's directions. 10 All cements were manipulated and applied according to the manufacturers' instructions. The mixed resin cement pastes were applied to the sandblasted and silanated surface of the pre-polymerized composite resin disc, after which the disc was placed on the dentin surface.…”

Effect of different adhesives combined with two resin composite cements on shear bond strength to polymeric CAD/CAM materials

“…Not only the bond between tooth and resin cement, but also the bond between restoration and resin composite cement determine the success of the restoration. For creating a satisfactory bond, further conditioning of the restoration material is needed 18,19) . The present study tested the influence of different conditioning methods and different resin composite cements on the shear bond strength (SBS) to polymeric CAD/CAM materials after water storage and thermal cycling.…”

Comparison of Physicochemical Surface Conditioning Methods for Adhesion of bis-GMA Resin Cement to Particulate Filler Composite and Surface Characterization

“…7 Group AB: PFC specimens were air-abraded with 30 µm silica coated alumina particles (CoJet Sand, 3M…”

“…Clinical indications for PFC indirect restorations are dictated by the amount of the remaining tooth structure, intraoral conditions, and the cost of the therapy [6]. Indirect PFC restorations are commonly indicated when maximum wear resistance is required, when proper contours and contact would be difficult to achieve intraorally, and when a ceramic restoration is not indicated because of the concerns on the wear of opposing dentition [4,5,7]. In addition, laboratory-processed PFC inlays/onlays are more resistant to occlusal wear than directly applied resin composites, have good optical properties, and also possess potential for repair [7].…”

“…HF could theoretically etch the silica particles and create a retentive surface on the PFC [11,14] depending on the acid concentration [6,14]. While Hooshmand et al [15] emphasized the positive effect of silane application, other studies claimed that mechanical attachment is the most important aspect for adhesion, and silane application seemed to be unnecessary for enhancing the bond strength of resin composite [7,16,17]. 5 In an attempt to better simulate the intraoral conditions, previous studies evaluated the effect of thermocycling on the adhesion between PFC and resin cement where decreased bond strength was observed between the two substrates [11,18,19].…”