3D-Printed Zirconia With Surface Textures Enhances Bonding Performance

作者：Jing Chen, Zhenyu Yang, Fu Wang, Xigeng Lyu, Lishuang Fan, Zhe Zhao, Jiale Li, Zhiqi Yan · 发表于：International Dental Journal · 年份：2025 · DOI：10.1016/j.identj.2025.105239 · 研究领域：Dental materials and restorations、Additive Manufacturing and 3D Printing Technologies、Dental Research and COVID-19

This study aimed to investigate the influence of textured surface design via nanoparticle jetting(NPJ) technology on bonding strength and durability of zirconia to resin Six groups of NPJ-printed zirconia with different surface textures (circular depth: 20 μm, 40 μm; circular void density: 15%, 30% and 60%) were prepared. Control groups included conventional machinable zirconia (CZ) and NPJ-printed zirconia(NZ) without surface textures. Specimens underwent sandblasting (50 μm Al2O3, 2 bar, 20 s) follow by surface characterization through SEM and contact angle measurements. After applying primer via conditioning protocols, resin cylinders (d = Ø3.5 mm × 2 mm) were bonded using dual-cure resin cement. Shear bond strength (SBS) was tested before and after 5,000 thermocycles, with data analyzed via ANOVA. All textured groups exhibited significantly higher immediate/aged SBS versus controls (P<0.05), with depth showing greater influence than void density. The 30% void density/40 μm depth group achieved the highest immediate SBS values (26.27±2.38 MPa), surpassing NZ and CZ by 40% and 80% respectively. Aged SBS values showed no intergroup differences among experimental groups (P > 0.05). Surface wettability of textured zirconia was improved through reduced contact angles. Failure analysis revealed 80-90% mixed failure (10-20% cohesive) in 30% void density/40 μm depth group, demonstrating effective mechanical interlocking. NPJ-based texturing approach significantly enhances the bond...