title: Bonding state of metal-free CAD/CAM onlay restoration after cyclic loading with and without immediate dentin sealing.
abstract: To examine the bonding state of metal-free CAD/CAM onlay restorations made from two popular resin composite blocks and a typical glass-ceramic block after cyclic loading, with and without immediate dentin sealing (IDS). Standardized mesial-distal-occlusalbuccal (MODB) cavities in 24 extracted human molars were prepared. The intra-cavity dentin surfaces of half of the cavities were immediately sealed with all-in-one adhesive and flowable composite, while those of the other half were not. All cavities were scanned, from which CAD/CAM onlays were fabricated from three types of block and cemented with an adhesive resin cement system. The restored specimens were subjected to cyclic loading and the intra-cavity microtensile bond strength was measured. IDS improves not only the internal bond strength, but also the bond reliability of metal-free CAD/CAM onlay restorations. The resin composite block seems to be more effective than a typical glass-ceramic block for achieving both high bond strength and excellent bond reliability.
authors.affiliation: Department of Adhesive Dentistry, School of Life Dentistry at Tokyo, The Nippon Dental University.
authors.forename: Noriko
authors.initials: N
authors.lastname: Ishii
authors.affiliation: Department of Adhesive Dentistry, School of Life Dentistry at Tokyo, The Nippon Dental University.
authors.forename: Toshio
authors.initials: T
authors.lastname: Maseki
authors.affiliation: Department of Adhesive Dentistry, School of Life Dentistry at Tokyo, The Nippon Dental University.
authors.forename: Yoichiro
authors.initials: Y
authors.lastname: Nara
mesh_terms: D003188:Composite Resins; D001840:Dental Bonding; D003804:Dentin; D017220:Dentin-Bonding Agents; D006801:Humans; D007284:Inlays; D008422:Materials Testing; D008670:Metals; D015203:Reproducibility of Results; D019279:Resin Cements; D013718:Tensile Strength
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; D008670:Metals; D019279:Resin Cements
keywords: CAD/CAM restoration; Cyclic loading; Immediate dentin sealing; Microtensile bond strength; Weibull analysis