title: Effects of primers containing thiouracil and phosphate monomers on bonding of resin to Ag-Pd-Au alloy.
abstract: The purpose of the present study was to evaluate the effects of four experimental primers on bond strength between a self-curing luting agent and silver-palladium-gold alloy. The experimental primers were in mixed solutions of a thiouracil primer (Metaltite) and a phosphate primer (Epricord, PM, PE, or PP), which were designated as Metaltite/Epricord, Metaltite/PM, Metaltite/PE, and Metaltite/PP respectively. Three primers (Metal Primer II, V-Primer, and Alloy Primer) were also prepared as controls. Alumina-blasted metal alloys were bonded with acrylic rods. After 5,000 thermocycles, the maximum shear bond strength was obtained with Metaltite/PE (27.8+/-2.4 MPa) and Metaltite/Epricord (27.6+/-5.9 MPa), followed by Metaltite/PP, Alloy Primer, Metaltite, Metaltite/PM, Metal Primer II, V-Primer, and Epricord. PE, PM, and PP showed the lowest bond strength. Results of this study revealed that the combined use of a thiouracil monomer and a phosphate monomer improved adhesive bonding. In this light, clinicians should pay attention to the types of functional monomers dissolved in a primer when fabricating resin-bonded prostheses.
authors.affiliation: Division 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.forename: Kohji
authors.initials: K
authors.lastname: Kamada
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Atsuta
mesh_terms: D000537:Aluminum Oxide / Q000737:chemistry; D001896:Boron Compounds / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D001840:Dental Bonding; D003764:Dental Materials / Q000737:chemistry*; D004577:Electron Probe Microanalysis; D006047:Gold Alloys / Q000737:chemistry*; D006801:Humans; D008422:Materials Testing; D008689:Methacrylates / Q000737:chemistry; D008768:Methylmethacrylates / Q000737:chemistry; D010165:Palladium / Q000737:chemistry*; D010710:Phosphates / Q000737:chemistry*; D019279:Resin Cements / Q000737:chemistry*; D033081:Shear Strength; D012834:Silver / Q000737:chemistry*; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013871:Thiones / Q000737:chemistry; D013889:Thiouracil / Q000031:analogs & derivatives / Q000737:chemistry*; D013997:Time Factors; D014227:Triazines / Q000737:chemistry
chemical_list: C521707:Alloy Primer; D001896:Boron Compounds; D003188:Composite Resins; D003764:Dental Materials; D006047:Gold Alloys; C509517:Metaltite; D008689:Methacrylates; D008768:Methylmethacrylates; D010710:Phosphates; D019279:Resin Cements; D013871:Thiones; D014227:Triazines; C107059:V-Primer; C498352:epricord; C476987:methylmethacrylate-tributylborane resin; C100646:Metal Primer; D012834:Silver; D013889:Thiouracil; D010165:Palladium; D000537:Aluminum Oxide