Luiza Freitas Brum Souza , Kétlin Fagundes Teixeira , Ana Carolina Cadore-Rodrigues , Felipe Somavilla Binotto , Natália de Freitas Daudt , Luiz Felipe Valandro , Rafael R. Moraes , Mutlu Özcan , Gabriel Kalil Rocha Pereira
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引用次数: 0
Abstract
This study evaluated the microshear bond strength (μSBS) of resin cement to a 3D-printed ceramic-containing resin composite (PriZma 3D Bio Crown, Makertech) subjected to different adhesive protocols (surface pretreatments and adhesive systems), in both baseline and aging conditions. For this, 3D-printed resin composite slices were fabricated and divided into groups based on adhesive protocols, considering three surface pretreatments: alumina grit-blasting (AlOx), 37 % phosphoric acid (PA), and a combination of both (AlOx + PA); and two adhesive systems: conventional (Adper Single Bond 2, 3M) and universal (Single Bond Universal, 3M). The resin cement (RelyX Ultimate, 3M) cylinder specimens (n = 18) underwent μSBS testing before and after thermocycling (12,000 cycles, 5-55 °C). Surface roughness (Ra and Rz), SEM topography, and failure modes were analyzed. Statistical analysis included One- and Two-Way ANOVA with Tukey tests for roughness and μSBS, respectively, and paired t-test to compare baseline and aging conditions considering the same adhesive protocol (α = 0.05). AlOx + PA with the universal adhesive demonstrated the highest bond strength in both baseline and aged conditions, with a minimal reduction after aging (11.68 %, p = 0.294). The PA-conventional adhesive group had the greatest reduction post-aging (50.32 %, p < 0.001). After aging, AlOx and PA with universal adhesive showed intermediate bond strengths, similar to AlOx + PA-universal, while the use of conventional adhesive resulted in lower bonding performance. In Baseline, AlOx + PA-universal exhibited the highest Weibull modulus, while AlOx + PA-conventional had the lowest. After aging, AlOx + PA-universal remained the highest, differing from the other groups but similar to AlOx + PA-conventional, whereas PA-universal had the lowest modulus. The other groups showed intermediate values without significant differences. The combination of alumina grit-blasting and phosphoric acid with a universal adhesive provides superior and more reliable bond strength under aging conditions.
期刊介绍:
The International Journal of Adhesion and Adhesives draws together the many aspects of the science and technology of adhesive materials, from fundamental research and development work to industrial applications. Subject areas covered include: interfacial interactions, surface chemistry, methods of testing, accumulation of test data on physical and mechanical properties, environmental effects, new adhesive materials, sealants, design of bonded joints, and manufacturing technology.