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Published on: December 20, 2024
Additively Manufactured Zirconia Ceramic Cantilever Resin-Bonded Fixed Dental Prostheses With Customized Intaglio
Yusen Shui1, Zhicheng Yin1, Chenyang Xie1
1State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China.
Objective:
To describe the clinical application of an additively-manufacturing (AM)-fabricated zirconia cantilever resin-bonded fixed dental prostheses (RBFDPs) incorporating digitally designed intaglio microstructures for replacement of a missing maxillary lateral incisor.
Clinical Considerations:
A 24-year-old woman with a missing maxillary right lateral incisor received cantilever zirconia RBFDPs supported by the maxillary central incisor. The restoration was fabricated using advanced customized jetting (ACJ), an A M technique that enabled predefined triangular microstructures to be incorporated directly into the intaglio surface of the zirconia framework. The restoration was bonded using an MDP-containing primer and a dual-cured cement. The seating position after cementation was digitally evaluated by using the tooth preparation dynamic depth monitoring (TP-DDM) function on the intraoral scan software, demonstrating positional deviations of < 100 μm.
Conclusions:
AM enabled controlled micromechanical features to be integrated directly into the intaglio surface of a zirconia cantilever RBFDPs. The combination of AM-fabricated microstructures and MDP-mediated bonding provides a clinically feasible strategy for combining micromechanical and chemical retention at the zirconia-resin interface.
Clinical Significance:
AM permits retentive surface features to be digitally designed and fabricated as an integral part of the zirconia framework. Combining these micromechanical features with MDP-mediated chemical bonding may provide a reproducible strategy for improving zirconia-resin bonding while reducing reliance on additional postfabrication surface-modification procedures.