title: Evaluation of metal bond strength to dentin and enamel using different adhesives and surface treatments.
abstract: Because adherence of base metal alloys is important for the long-term clinical success of adhesive fixed partial dentures, it has been necessary to improve adhesion to metal substrate by using different surface treatments. This study used different surface conditioning methods and two different luting resins to evaluate the shear bond strength of base metal alloys to dentin and enamel. Sixty noncarious freshly extracted human teeth were mounted in a plastic holder filled with autopolymerized acrylic resin. After the roots were removed and 30 flat enamel and 30 flat dentin surfaces were exposed, the specimens were divided randomly into two main luting cement groups. Sixty nickel chromium (NiCr) metal specimens were fabricated and subjected to three different surface conditioning procedures: sandblasting with 50 microm aluminum oxide, tribochemical silica coating, and a combination of the two. Scanning electron mircoscopy (SEM) evaluations revealed mainly cohesive failures. Self-cure adhesive resulted in higher bond strengths to dental substrates. Higher bond strengths were achieved through a combination of sandblasting and tribochemical silica coating; however, further clinical research is required. A surface treatment that combines sandblasting with tribochemical silica coating can achieve a more effective bond for adhesive restorations with metal substrates.
authors.affiliation: Department of Prosthodontics, School of Dentistry, Ege University, Izmir, Turkey.
authors.forename: Mine
authors.initials: M
authors.lastname: Dundar
authors.forename: Mehmet Ali
authors.initials: MA
authors.lastname: Gungor
authors.forename: Ebru
authors.initials: E
authors.lastname: Cal
authors.forename: Alev
authors.initials: A
authors.lastname: Darcan
authors.forename: Adalet
authors.initials: A
authors.lastname: Erdem
mesh_terms: D000269:Adhesives / Q000737:chemistry; D000537:Aluminum Oxide / Q000737:chemistry; D001896:Boron Compounds / Q000737:chemistry; D002858:Chromium Alloys / Q000737:chemistry*; D020099:Coated Materials, Biocompatible / Q000737:chemistry; D001840:Dental Bonding; D003743:Dental Enamel / Q000648:ultrastructure*; D003804:Dentin / Q000648:ultrastructure*; D006801:Humans; D008689:Methacrylates / Q000737:chemistry; D008768:Methylmethacrylates / Q000737:chemistry; D008855:Microscopy, Electron, Scanning; D019279:Resin Cements / Q000737:chemistry*; D033081:Shear Strength; D012822:Silicon Dioxide / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties
chemical_list: D000269:Adhesives; D001896:Boron Compounds; D002858:Chromium Alloys; D020099:Coated Materials, Biocompatible; D008689:Methacrylates; D008768:Methylmethacrylates; C438843:Panavia-Fluoro; D019279:Resin Cements; D012822:Silicon Dioxide; C049495:Super-bond; D000537:Aluminum Oxide