title: ESCA study on dental alloy surfaces modified by Ga-Sn alloy.
abstract: A new, simple surface modification method for adherend metals has been developed. It gives high bond strength and superior water durability to dental precious-metal alloys bonded with 4-META/MMA-TBB resin. However, there was no effect on the bonding of Ag-In-Zn alloy and base-metal alloys. In the present study, the alloy surfaces modified by the new method were analyzed by ESCA and SEM for determination of details of the modification effect. A new alloying layer containing Ga and Sn was formed on the precious-metal alloys. The main factor for excellent adhesion to be achieved was the formation of a very thin layer of Ga2O3 and SnO2, less than 1-2nm thick, on the alloy surface. A thicker modified layer, as formed on the Ag-In-Zn and Ni-Cr alloys, led to low bonding ability.
authors.affiliation: Department of Dental Materials Science, Higashi-Nippon-Gakuen University, Hokkaido, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Ohno
authors.forename: Y
authors.initials: Y
authors.lastname: Araki
authors.forename: K
authors.initials: K
authors.lastname: Endo
mesh_terms: D000180:Acrylic Resins / Q000737:chemistry; D000268:Adhesiveness; D000497:Alloys / Q000737:chemistry; D001896:Boron Compounds / Q000737:chemistry; D002858:Chromium Alloys / Q000737:chemistry; D003722:Dental Alloys / Q000737:chemistry*; D001840:Dental Bonding / Q000379:methods*; D004577:Electron Probe Microanalysis; D005708:Gallium / Q000737:chemistry*; D006047:Gold Alloys / Q000737:chemistry; D007204:Indium / Q000737:chemistry; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D010084:Oxidation-Reduction; D012834:Silver / Q000737:chemistry; D013499:Surface Properties; D013718:Tensile Strength; D014001:Tin / Q000737:chemistry*; D017971:Tin Compounds
chemical_list: D000180:Acrylic Resins; C075320:Adlloy; D000497:Alloys; D001896:Boron Compounds; D002858:Chromium Alloys; D003722:Dental Alloys; D006047:Gold Alloys; D017971:Tin Compounds; D007204:Indium; C009523:tri-n-butylborane; D012834:Silver; C038863:gallium oxide; D014001:Tin; C031172:4-META resin; D005708:Gallium; C045358:stannic oxide