Effects of alumina airborne-particle abrasion on the surface properties of CAD/CAM composites and bond strength to resin cement

• Published in: Dental Materials Journal Vol. 40; no. 2; pp. 431 - 438
• Main Authors: YANO, Haruka TAKESUE, IKEDA, Hiroshi, NAGAMATSU, Yuki, MASAKI, Chihiro, HOSOKAWA, Ryuji, SHIMIZU, Hiroshi
• Format: Journal Article
• Language: English; Japanese
• Published: Japan The Japanese Society for Dental Materials and Devices 25.03.2021; Japanese Society for Dental Materials and Devices; Japan Science and Technology Agency
• Subjects: Abrasion; Adhesive bonding; Aluminum Oxide; Blasting; Bonding; Bonding strength; CAD/CAM; CAM; Cement; Ceramics; Composite resin; Composite Resins; Computer aided manufacturing; Dental Bonding; Dentistry; Free energy; Materials Testing; Morphology; Particulate composites; Polymer-infiltrated ceramic; Polymers; Resin Cements; Resins; Shear Strength; Surface free energy; Surface Properties; Blasting; Bonding; Composite resin; Surface free energy; Polymer-infiltrated ceramic
• ISSN: 0287-4547; 1881-1361
• DOI: 10.4012/dmj.2020-023

The purpose of this study is to clarify physical and chemical changes in surfaces of CAD/CAM composites caused by alumina airborne-particle abrasion and its effect on adhesive bonding. Our study involved three dispersed filler (DF)-based and a polymer-infiltrated ceramic network (PICN)-based CAD/CAM composites. Changes in the surface morphologies of the composites were examined, and surface free energy (SFE) analysis was performed based on Owens-Wendt theory. The influence of the abrasion on the bond strengths of CAD/CAM composites to the resin cement was characterized by shear bond strength (SBS) test. The abrasion increased the roughness of the composites. The SFE analysis showed that the abrasion significantly increased the dispersive component but decreased the polar component of the SFE associated with the DF-based composites, while no change occurred for those of the PICN-based composite. The abrasion slightly improved the SBSs for the DF-based composites but not that of the PICN-based composite.