title: Bonding durability against water of a fluorine-containing resin for precious metal alloys.
abstract: In order to clarify the effect of fluorination of an adhesive resin on the durability of the resin bond to precious metal alloys, 2,2,2-trifluoroethyl methacrylate (TFEMA)-poly(2,2,2-trifluoroethyl methacrylate) (PTFEMA)/TBBO adhesive resin was prepared. The tensile bond strength of this resin to precious metal alloys treated with 9,10-epithiodecyl methacrylate (EP8MA) generally increased in the order Ag alloy<Pd alloy<Au alloy after thermal cycling; bond strength was decreased by thermal cycling. The water sorption of TFEMA-PTFEMA/TBBO resin was much higher than that of MMA-PMMA/TBBO resin because of phase separation. For Au alloy, the bonding durability of TFEMA-PTFEMA/TBBO resin against penetration of water was comparable to that of MMA-PMMA/TBBO resin; however, for Pd and Ag alloys the performance of the fluorinated resin was markedly inferior to that of MMA-PMMA/TBBO resin. These reduced tensile bond strengths were considered to be caused by insufficient copolymerization with EP8MA molecules adsorbed on the precious metal alloys.
authors.affiliation: Department of Applied Functional Molecules, Division of Biofunctional Molecules, Institute of Biomaterials and Bioengineering, Tokyo Medical and Dental University, Chiyoda-ku, Tokyo 101-0062, Japan. y-kadoma.fm@tmd.ac.jp
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Kadoma
authors.forename: Yoh
authors.initials: Y
authors.lastname: Tamaki
mesh_terms: D003188:Composite Resins / Q000737:chemistry*; D003722:Dental Alloys / Q000737:chemistry*; D001840:Dental Bonding; D003735:Dental Casting Technique; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis; D005461:Fluorine / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D008422:Materials Testing; D008768:Methylmethacrylates / Q000737:chemistry; D013718:Tensile Strength; D014867:Water / Q000737:chemistry
chemical_list: D003188:Composite Resins; D003722:Dental Alloys; D008768:Methylmethacrylates; D014867:Water; D005461:Fluorine; C045669:2,2,2-trifluoroethyl methacrylate