title: Effects of tributylborane-activated adhesive and two silane agents on bonding computer-aided design and manufacturing (CAD/CAM) resin composite.
abstract: The present study was conducted to evaluate the effects of an experimental adhesive agent [methyl methacrylate-tributylborane liquid (MT)] and two adhesive agents containing silane on the bonding between a resin composite block of a computer-aided design and manufacturing (CAD/CAM) system and a light-curing resin composite veneering material. The surfaces of CAD/CAM resin composite specimens were ground with silicon-carbide paper, treated with phosphoric acid, and then primed with either one of the two silane agents [Scotchbond Universal Adhesive (SC) and GC Ceramic Primer II (GC)], no adhesive control (Cont), or one of three combinations (MT/SC, MT/GC, and MT/Cont). A light-curing resin composite was veneered on the primed CAD/CAM resin composite surface. The veneered specimens were subjected to thermocycling between 4 and 60 °C for 10,000 cycles, and the shear bond strengths were determined. All data were analyzed using analysis of variance and a post hoc Tukey-Kramer HSD test (α = 0.05, n = 8). MT/SC (38.7 MPa) exhibited the highest mean bond strengths, followed by MT/GC (30.4 MPa), SC (27.9 MPa), and MT/Cont (25.7 MPa), while Cont (12.9 MPa) and GC (12.3 MPa) resulted in the lowest bond strengths. The use of MT in conjunction with a silane agent significantly improved the bond strength. Surface treatment with appropriate adhesive agents was confirmed as a prerequisite for veneering CAD/CAM resin composite restorations.
authors.affiliation: Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, Nagasaki, 852-8588, Japan.
authors.forename: Ayano
authors.initials: A
authors.lastname: Shinohara
authors.affiliation: Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, Nagasaki, 852-8588, Japan. yohsuke@nagasaki-u.ac.jp.
authors.forename: Yohsuke
authors.initials: Y
authors.lastname: Taira
authors.affiliation: Department of Applied Prosthodontics, Graduate School of Biomedical Sciences, Nagasaki University, 1-7-1 Sakamoto, Nagasaki, 852-8588, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Sawase
mesh_terms: D000134:Acid Etching, Dental; D001896:Boron Compounds / Q000737:chemistry*; D017076:Computer-Aided Design; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry*; D008422:Materials Testing; D019279:Resin Cements / Q000737:chemistry*; D033081:Shear Strength
chemical_list: D001896:Boron Compounds; D003738:Dental Cements; C118365:GC ceramic; D019279:Resin Cements; D003776:Dental Porcelain; C009523:tri-n-butylborane; C041330:Scotchbond
keywords: Adhesion; CAD/CAM; Resin composite; Surface modification