Effect of alumina air-abrasion on mechanical bonding between an acrylic resin and casting alloys
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概要
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This study examined the effect of alumina air-abrasion with different pressure on bonding between an acrylic resin and casting alloys. Disk specimens (8 and 10 mm in diameter) were cast from a silver-palladium-copper-gold (Ag-Pd-Cu-Au, Castwell M.C.12) alloy and a titanium-aluminum-niobium alloy (Ti-6Al-7Nb, T-Alloy Tough). The disks were air-abraded with alumina particles (50-70 μm) under different air-pressures (0 unabraded, 0.1, and 0.6 MPa). The disk pairs were bonded together with a tri-n-butylborane (TBB)-initiated acrylic resin, and shear bond strengths were determined both before and after thermocycling. Bond strength varied from a maximum of 37.1 MPa to a minimum of 3.6 MPa for the Ag-Pd-Cu-Au alloy, whereas bond strength to Ti-6Al-7Nb alloy ranged from 34.7 MPa to 0.1 MPa. Specimens abraded with 0.6 MPa pressure recorded the greatest post-thermocycling bond strength (21.7 MPa and 17.9 MPa), and unabraded specimens showed the lowest strength (3.6 MPa and 0.1 MPa) for both alloys. Post-thermocycling bond strength to the Ag-Pd-Cu-Au alloy was higher than that to the Ti-6Al-7Nb alloy under identical air-abrading conditions. It can be concluded that alumina air-abrasion with an air-pressure of 0.6 MPa is effective in enhancing retentive characteristics of the TBB-initiated resin joined to the alloys. (J Oral Sci 51, 161-166, 2009)
著者
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TANOUE Naomi
Nagasaki University Hospital
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KOIZUMI Hiroyasu
Department of Fixed Prosthodontics, Nihon University School of Dentistry
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MATSUMURA Hideo
Department of Fixed Prosthodontics, Nihon University School of Dentistry
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Matsumura H
Department Of Fixed Prosthodontics Nihon University School Of Dentistry
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Ishii Takaya
Division of Applied Oral Sciences, Nihon University Graduate School of Dentistry
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Naito Koji
Division of Applied Oral Sciences, Nihon University Graduate School of Dentistry
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Yamashita Miyuki
Division of Applied Oral Sciences, Nihon University Graduate School of Dentistry
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Koizumi H
Department Of Fixed Prosthodontics Nihon University School Of Dentistry
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Tanoue N
Nagasaki University Hospital
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Tanoue Naomi
Nagasaki Univ. Hospital Nagasaki Jpn
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Matsumura Hideo
Department Of Crown And Bridge Prosthodontics Nihon University School Of Dentistry
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Koizumi Hiroyasu
Department Of Fixed Prosthodontics Nihon University School Of Dentistry
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