Chemical alteration of Ag-Pd-Cu-Au alloy surface by alumina air-abrasion and its effect on bonding to resin cement

• Published in: Dental Materials Journal Vol. 38; no. 4; pp. 630 - 637
• Main Authors: MIYAHARA, Hirotake, IKEDA, Hiroshi, FUJIO, Yuki, YOSHII, Shinji, NAGAMATSU, Yuki, KITAMURA, Chiaki, SHIMIZU, Hiroshi
• Format: Journal Article
• Language: English; Japanese
• Published: Japan The Japanese Society for Dental Materials and Devices 26.07.2019; Japanese Society for Dental Materials and Devices; Japan Science and Technology Agency
• Subjects: Abrasion; Al2O3; Alumina; Aluminum oxide; Bond strength; Bonding strength; Copper; Copper base alloys; Dental alloy; Dental alloys; Dental cement; Dental restorative materials; Dentistry; Gold; Morphology; Organic chemistry; Palladium; Phosphate monomer; Polymethyl methacrylate; Primers; Resins; Sandblast; Silver; Surface properties; Phosphate monomer; Copper; Al2O3; Dental alloy; Sandblast
• ISSN: 0287-4547; 1881-1361
• DOI: 10.4012/dmj.2018-276

The goal of this study was to investigate the chemical alteration of a dental alloy surface by alumina air-abrasion and its effect on bonding to resin cement. Alumina air-abrasion was carried out on an Ag-Pd-Cu-Au alloy. The surface morphology and chemical state of the abraded alloy were characterized. The effect of the air-abrasion on the shear bond strength between the alloy and a methyl methacrylate/tri-n-butyl borane (MMA/TBB) resin cement with some primers was evaluated. The surface characterization revealed that the alumina air-abrasion mechanically roughened and chemically altered the surface. The chemical alterations had two effects: (1) abraded alumina particles remained on the alloy surface and (2) copper ions were oxidized in the alloy surface. As the result, the shear bond strength test indicated that 10-methacryloyloxydecyl dihydrogen phosphate (MDP) contained primer worked with the abraded alloy surface, whereas it did not work with the non-abraded alloy surface.