Influence of surface treatment on bonding of resin luting cement to CAD/CAM composite blocks

• Published in: Dental Materials Journal Vol. 39; no. 5; pp. 834 - 843
• Main Authors: TAKAHASHI, Nao, YABUKI, Chiaki, KUROKAWA, Hiroyasu, TAKAMIZAWA, Toshiki, KASAHARA, Yuta, SAEGUSA, Makoto, SUZUKI, Miho, MIYAZAKI, Masashi
• Format: Journal Article
• Language: English; Japanese
• Published: Japan The Japanese Society for Dental Materials and Devices 28.09.2020; Japanese Society for Dental Materials and Devices; Japan Science and Technology Agency
• Subjects: Aluminum oxide; Bond strength; Bonding strength; CAD/CAM; CAD/CAM composite block; CAM; Cements; Composite materials; Computer aided manufacturing; Dentistry; Energy storage; Free energy; Resin cement; Resins; Surface treatment; Resin cement; Bond strength; CAD/CAM composite block; Surface treatment
• ISSN: 0287-4547; 1881-1361
• DOI: 10.4012/dmj.2019-247

The aim of this study was to determine the influence of different surface treatments of CAD/CAM composite blocks on bonding effectiveness of resin cements, based on the shear bond strength test and the surface science examination. Specimens were fabricated from two types of CAD/CAM composite blocks (Cerasmart and VITA Enamic), and the specimen surfaces were alumina sandblasted. Specimen surfaces were treated with i) silane, ii) primer, and iii) silane+primer, then two types of cements (Block HC Cem and Super Bond) were bonded. After 24 h storage, bond strengths were measured. Surface free energy measurements were performed of the treated CAD/CAM composite blocks surfaces. The groups ii) and iii) showed significantly higher bond strengths than the group i), apart from VITA Enamic with Block HC Cem. Although the total surface free energy showed different trends in different surface treatments, a similar trend was found in both CAD/CAM composite blocks.