title: Effect of noble metal adhesive systems on bonding between an indirect composite material and a gold alloy.
abstract: In this study, the bond strength between an indirect composite and a gold alloy was determined for the purpose of evaluating noble metal bonding systems. A single liquid primer designed for conditioning noble metal alloys (Infis Opaque Primer) and tri-n-butylborane-initiated adhesive resins (Super-Bond C & B), with or without the powder component, were assessed. Cast gold alloy disks (Casting Gold type IV) were air-abraded with alumina, followed by six surface preparations, and were then bonded with a light-activated composite material (New Metacolor Infis). Shear testing was performed both before and after thermocycling for evaluation of bond durability. The results showed that three primed groups improved post-thermocycling bond strengths compared to each of the corresponding unprimed groups (P < 0.01). The bond strength was reduced for all six groups by the application of thermocycling (P < 0.01). After thermocycling, the group primed with the Infis Opaque Primer material and bonded with the Super-Bond C & B resin exhibited the greatest bond strength (23.4 MPa). The Infis Opaque Primer and Super-Bond bonding system increased the post-thermocycling bond strength of the control group by a factor of approximately ten. This simple technique is applicable in the fabrication of composite veneered restorations and cone-telescope dentures.
authors.affiliation: Division of Fixed Prosthodontics and Oral Rehabilitation, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Nagano
authors.forename: Naomi
authors.initials: N
authors.lastname: Tanoue
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Atsuta
authors.forename: Hiroyasu
authors.initials: H
authors.lastname: Koizumi
authors.forename: Hideo
authors.initials: H
authors.lastname: Matsumura
mesh_terms: D000269:Adhesives; D020906:Air Abrasion, Dental; D001896:Boron Compounds; D003188:Composite Resins; D003442:Crowns; D001840:Dental Bonding; D003799:Dental Stress Analysis; D003801:Dental Veneers; D006047:Gold Alloys; D008422:Materials Testing; D008689:Methacrylates; D008768:Methylmethacrylates; D019279:Resin Cements; D033081:Shear Strength; D013499:Surface Properties; D014227:Triazines
chemical_list: D000269:Adhesives; D001896:Boron Compounds; D003188:Composite Resins; D006047:Gold Alloys; D008689:Methacrylates; D008768:Methylmethacrylates; D019279:Resin Cements; D014227:Triazines; C107059:V-Primer; C009523:tri-n-butylborane; C083618:new metacolor; C049495:Super-bond