Bond strength of CAD/CAM-manufactured composite resin and ceramic veneers to a zirconia framework

Abstract

This study investigated bond strength of CAD/CAM-manufactured composite resin and ceramic veneers to a zirconia framework and analyzed the effect of treatments of veneer surfaces. A CAD/CAM resin-based (AVE) composite or lithium disilicate ceramic (IEC) block was used as the veneer material. AVE and IEC specimens were assigned to receive one of three surface treatments (n = 22): no surface treatment, acid-etching with 9.5% hydrofluoric acid gel, and airborne-particle abrasion with alumina particles. Zirconia disks and AVE or IEC specimens in each group were bonded with a resin-based luting agent, and shear bond strength of the specimens was measured at 0 and 20,000 thermocycles. Significant differences were assessed by the Steel-Dwass test for multiple comparisons and Mann-Whitney U-test (α = 0.05). As compared with other surface treatments, bond strengths were significantly higher at 0 and 20,000 thermocycles in the airborne-particle abraded AVE and acid-etched IEC specimens. Airborne-particle abrasion of the surface of AVE specimens increased bond strength between AVE veneers and zirconia frameworks, while hydrofluoric acid treatment enhanced bond strength between IEC veneers and zirconia frameworks.

Effect of Air-Abraded Versus Laser-Fused Fluorapatite Glass-Ceramics on Shear Bond Strength of Repair Materials to Zirconia

“…Shear bond strength (SBS) is a simple and reliable testing method to investigate bond strength between dissimilar materials, especially when the bonding surface area has an average diameter of 5 mm [45]. It was frequently used as a method of bonding different materials to zirconia [46][47][48]. Microtensile bond strength is a more valid method of testing the adhesion strength between two different materials compared to SBS [49].…”

“…According to ISO standards recommendations for dental materials testing, the interface between the two bonded materials should be loaded in shear at a cross speed of 0.75 ± 0.30 mm/min till debonding [52]. The choice of 0.5 mm/min as a crosshead speed still matches with ISO standards recommendations, and it was based on previous studies before [48,53,54].…”

Comparing the Efficacy of Shear Bond Strength with Composite Attachments and Different Ceramic Surfaces-Zirconia, Lithium Disilicate, and Feldspathic Porcelain

“…To achieve proper results, a study must be conducted with the same preparation of the material, thermocycling, and composite resins. In the context of CAD/CAM-manufactured composite resin to zirconia, Kimura, et al [14] confirmed their rejection of the null hypothesis that thermocycling does not impact shear bond strength.…”

Influence of roughening procedures and priming agents on shear bond strength of CAD/CAM materials to zirconia frameworks

“…Hydrofluoric acid-etching produces selective dissolving of the glassy matrix and exposing crystalline structures. Kimura et al 25) evaluated the effect of different surface roughening procedures on the shear bond strength of a CAD/CAM composite resin material to a zirconia framework using a resin luting agent without priming. As a result, airborneparticle abrasion to the CAD/CAM composite resin material achieved a stable bond strength 25) .…”

“…Kimura et al 25) evaluated the effect of different surface roughening procedures on the shear bond strength of a CAD/CAM composite resin material to a zirconia framework using a resin luting agent without priming. As a result, airborneparticle abrasion to the CAD/CAM composite resin material achieved a stable bond strength 25) . However, the influence of chemical surface treatments on bond strength between CAD/CAM composite resin materials and zirconia frameworks has still not been clarified.…”