title: Effect of ultrasonic instrumentation on bond strength of three dental cements bonded to nickel-chromium alloy.
abstract: This study examined the effect of ultrasonic instrumentation on the bond strength of three types of luting material joined to a nickel-chromium alloy. Disk metal specimens were bonded together with zinc phosphate, glass ionomer, and adhesive resin luting agents. The bonded specimens were immersed in water, then vibrated with an ultrasonic unit for 0 to 5 minutes. The shear bond strength in the 0 or nonvibrated group was 50.1 MPa for adhesive resin, 18.4 MPa for glass ionomer, and 4.7 MPa for zinc phosphate cement. Vibration for a period of 5 minutes significantly diminished the bond strength of adhesive resin and glass ionomer materials, whereas the bond strength of zinc phosphate cement was affected after only 1 minute.
authors.affiliation: Department of Fixed Prosthodontics, Nagasaki University, School of Dentistry, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Matsumura
authors.forename: J P
authors.initials: JP
authors.lastname: Salonga
authors.forename: Y
authors.initials: Y
authors.lastname: Taira
authors.forename: M
authors.initials: M
authors.lastname: Atsuta
mesh_terms: D000180:Acrylic Resins; D000704:Analysis of Variance; D002858:Chromium Alloys; D001840:Dental Bonding; D003738:Dental Cements / Q000737:chemistry*; D003793:Dental Restoration, Permanent; D005899:Glass Ionomer Cements; D008422:Materials Testing; D014465:Ultrasonics; D014732:Vibration; D015036:Zinc Phosphate Cement
chemical_list: D000180:Acrylic Resins; D002858:Chromium Alloys; D003738:Dental Cements; D005899:Glass Ionomer Cements; D015036:Zinc Phosphate Cement; C031172:4-META resin