title: An investigation into the effects of metal primer and surface topography on the tensile bond strength between cobalt chromium alloy and composite resin.
abstract: This study examined the influence of surface preparation and metal primer on the tensile bond strength between cobalt chromium alloy and composite resin. The bond strength between 168 cobalt chromium alloy dumb-bells with one of three test surfaces (beaded, machined or sandblasted) to composite resin were tested. Half of each group were treated with metal primer. The weakest bond strength was produced by the unprimed machined surface, many specimens failing before testing. The metal primer increased the bond strengths of all groups tested. The greatest bond strengths were achieved with the primed beaded and sandblasted surfaces. Within the limits of the study it has been shown that the surface preparation of the cobalt-chromium alloy did influence tensile bond strengths with composite resin and Metal Primer II increased the tensile bond strengths for all groups tested. The sandblasted surface treated with Metal Primer II is recommended for the bonding of composite resin to cobalt chromium alloy.
authors.affiliation: Glenfield Hospital NHS Trust, Leicester, United Kingdom. d_newsum@hotmail.com
authors.forename: David
authors.initials: D
authors.lastname: Newsum
authors.forename: Andrzej
authors.initials: A
authors.lastname: Juszczyk
authors.forename: Robert K F
authors.initials: RK
authors.lastname: Clark
authors.forename: David R
authors.initials: DR
authors.lastname: Radford
mesh_terms: D002858:Chromium Alloys; D003035:Cobalt; D003188:Composite Resins; D001840:Dental Bonding; D003775:Dental Polishing; D003799:Dental Stress Analysis; D008422:Materials Testing; D008689:Methacrylates; D008855:Microscopy, Electron, Scanning; D010710:Phosphates; D019279:Resin Cements; D013499:Surface Properties; D013718:Tensile Strength
chemical_list: D002858:Chromium Alloys; D003188:Composite Resins; D008689:Methacrylates; D010710:Phosphates; D019279:Resin Cements; C100646:Metal Primer; D003035:Cobalt; C035638:thiophosphoric acid