Fracture Resistance of CAD/CAM Nanohybrid Resin Occlusal Veneers Based on Bonding Surface: Enamel vs. Enamel-Dentin vs. Enamel-Resin Coating
Tozo-Burgos J.G.; Juárez-Vizcarra C.F.; Calla-Poma R.; Sánchez-Tito M. · Journal of Clinical and Experimental Dentistry (2025) · DOI: 10.4317/jced.62793
Resumen
Background: Occlusal veneers provide an effective alternative for treating severe tooth wear. The aim of this study was to evaluate the influence of the bonding surface on the fracture resistance of CAD/CAM nanohybrid resin occlusal veneers with different thicknesses. Material and Methods: A total of 62 occlusal veneers were fabricated for first premolars. The specimens were divided into two groups of 36 based on the thickness of the veneers, (1.0 mm and 1.5 mm). Each group was further subdivided according to the bonding surface, categorized as enamel, enamel-dentin, and enamel-resin coating. The fracture resistance of the veneers was evaluated by applying a constant load at a speed of 1 mm/min using a universal testing maching. After fracture of the samples, they were analyzed using a stereomicroscope. Student’s t-test was employed to compare fracture resistance in relation to thickness and bonding surface. Addionally, two-way ANOVA was used to assess the interaction between the variables. The significance level was set to 5%. Results: The 1.5 mm occlusal veneers exhibited significantly higher fracture resistance compared to the 1.0 mm veneers (p < 0.05). The two-way ANOVA test indicated that the interaction between restoration thickness and bonding surface was not significant (p = 0.3008). However, both restoration thickness (p < 0.001) and bonding surface (p < 0.001) had a significant impact on fracture resistance. Conclusions: Fracture resistance was highest in CAD/CAM nanohybrid resin occlusal veneers bonded to enamel and resin coatings. Likewise, restorations with a thickness of 1.5 mm showed significantly higher values across all three groups evaluated. © Medicina Oral S. L. C.I.F. B 96689336 - eISSN: 1989–5488
Instituciones: Universidad Nacional Mayor de San Marcos; Universidad Privada de Tacna