Optimized Microporous Surfaces Increase Bond durability of NPJ-printed zirconia

• Published in: International dental journal Vol. 74; p. S186
• Main Authors: Ma, Yuhan, Wang, Huihua, Xiang, Yang, Li, Mingxing, Shen, Dongni, Zhang, Sisi, Zhou, Xiaojian, An, Jun, Shi, Ying, Fu, Baiping
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.10.2024
• ISSN: 0020-6539
• DOI: 10.1016/j.identj.2024.07.1143

To investigate the effects of optimized microporous surfaces on bond strength and durability of the latest nanoparticle jetting (NPJ)-printed zirconia. Zirconia microporous surfaces were optimized through finite element analysis. Zirconia disks and cylinders (N=128) were randomly divided into four groups based on different surface morphology and treatment. The shear bond strengths (SBSs) were tested before and after 10,000 thermocycles and were analyzed by one-way ANOVA. The optimized microporous surface was characterized by circular micropores with 60% porosity, 20 µm of depths, 10 µm of undercuts. The optimized surface combined with airborne-particle abrasion (APA) and MDP-containing resin cement possessed the highest SBSs before and after thermocycling aging. The optimized microporous zirconia could greatly increase the zirconia bond strength and durability in combination with APA treatment and application of MDP-containing resin cement.