title: Evaluation of adhesive defects using an ultrasonic pulse-reflection technique.
abstract: The purpose of this study was to examine the application of an ultrasonic pulse-reflection technique for the evaluation of adhesive defects. First, the sonic velocities in the enamel and dentin of human molars and bovine incisors were measured with a pulsar receiver attached to an ultrasonic transducer. The identification of the dentino-enamel junction and pulp-dentin interface using the ultrasonic method based on intrinsic sonic velocities showed good agreement with the actual measured thicknesses. Next, a cemented restoration with artificial faults was prepared. Half of the Au-Ag-Pd alloy plate area was cemented to the dentin slab using luting resin cement. The adhesive interface was evaluated with a high-resolution ultrasonic imaging system. Clear internal faults were evident from the ultrasonic tomogram. The findings of this study suggest that the ultrasonic pulse-reflection technique may be useful for inspecting and imaging structural defects of adhesive interfaces.
authors.affiliation: Department of Prosthetic Dentistry, Kanagawa Dental College 82 Inaoka-cho, Yokosuka-shi, Kanagawa 238-8580, Japan.
authors.forename: Naho
authors.initials: N
authors.lastname: Hamano
authors.forename: Koji
authors.initials: K
authors.lastname: Hanaoka
authors.forename: Kei
authors.initials: K
authors.lastname: Ebihara
authors.forename: Minoru
authors.initials: M
authors.lastname: Toyoda
authors.forename: Toshio
authors.initials: T
authors.lastname: Teranaka
mesh_terms: D000818:Animals; D002417:Cattle; D003738:Dental Cements; D003743:Dental Enamel / Q000000981:diagnostic imaging*; D003763:Dental Leakage / Q000000981:diagnostic imaging*; D003782:Dental Pulp / Q000000981:diagnostic imaging; D019232:Dental Restoration Failure; D003793:Dental Restoration, Permanent; D003804:Dentin / Q000000981:diagnostic imaging*; D006801:Humans; D066298:In Vitro Techniques; D007180:Incisor / Q000000981:diagnostic imaging; D008963:Molar / Q000000981:diagnostic imaging; D014054:Tomography / Q000295:instrumentation; D019237:Tooth Cervix / Q000000981:diagnostic imaging; D014463:Ultrasonography
chemical_list: D003738:Dental Cements