title: Bonding of flowable resin composite restorations to class 1 occlusal cavities with and without cyclic load stress.
abstract: To examine the bonding of flowable resin composite restorations (F-restoration) to class 1 occlusal cavities with and without cyclic load stress, compared with that of a universal resin composite restoration (U-restoration). Two flowable composites and one universal composite (control) were applied with an adhesive system to 42 standardized class 1 occlusal cavities. The restored specimens were subjected to cyclic load stress and no stress modes. The microtensile bond strength (μ-TBS) of the dentin floor was measured. The U-restoration did not show pretesting failure. The F-restorations exhibited pretesting failure, regardless of the stress mode. The μ-TBS was not significantly different among the three restorations, regardless of the stress mode. The cyclic load stress did not influence the μ-TBS of the F-restorations; however, it significantly reduced μ-TBS in the U-restoration. The bonding reliability of the F-restorations was inferior to that of the U-restoration, for both stress modes.
authors.affiliation: Department of Adhesive Dentistry, School of Life Dentistry at Tokyo, The Nippon Dental University.
authors.forename: Takatoshi
authors.initials: T
authors.lastname: Kawai
authors.forename: Toshio
authors.initials: T
authors.lastname: Maseki
authors.forename: Yoichiro
authors.initials: Y
authors.lastname: Nara
mesh_terms: D003188:Composite Resins; D001840:Dental Bonding; D003793:Dental Restoration, Permanent; D003804:Dentin; D017220:Dentin-Bonding Agents; D006801:Humans; D008422:Materials Testing; D015203:Reproducibility of Results; D019279:Resin Cements
chemical_list: D003188:Composite Resins; D017220:Dentin-Bonding Agents; D019279:Resin Cements