title: Enamel bonding of self-etching and phosphoric acid-etching orthodontic adhesives in simulated clinical conditions: debonding force and enamel surface.
abstract: This study aimed to evaluate the effectiveness of self-etching and phosphoric acid-etching orthodontic adhesives for enamel bonding in simulated clinical conditions. By using two self-etching (Transbond Plus, TP; Beauty Ortho Bond, BB) and two acid-etching (Transbond XT, TX; Superbond Orthomite, SB) adhesives, orthodontic brackets were bonded on human premolars (n=10 for each adhesive). Ten teeth without bracket bonding, i.e., intact enamel surfaces, were used as control for SEM observation. After 7-day storage in lactic acid solution, bracket debonding force by means of debonding pliers, adhesive remnant index (ARI), and enamel surface morphology were examined. All the tested adhesives exhibited sufficient bond strength for clinical use. The ARI scores were almost the same among the four adhesives. In terms of SEM observation, the enamel surfaces in the control and TP groups showed a slight change after immersion in lactic acid solution, while the BB group showed less change on the enamel surface compared with the TP group. Meanwhile, the two acid-etching adhesives caused considerable demineralization. Taken together, these findings indicated that the action of self-etching systems was evidently more conservative.
authors.affiliation: Department of Orthodontics and Dentofacial Orthopedics, The University of Tokushima Graduate School of Oral Sciences, Tokushima, Japan. horiu@dent.tokushima-u.ac.jp
authors.forename: Shinya
authors.initials: S
authors.lastname: Horiuch
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Kaneko
authors.forename: Hiroko
authors.initials: H
authors.lastname: Mori
authors.forename: Emi
authors.initials: E
authors.lastname: Kawakami
authors.forename: Takashi
authors.initials: T
authors.lastname: Tsukahara
authors.forename: Kohji
authors.initials: K
authors.lastname: Yamamoto
authors.forename: Kenichi
authors.initials: K
authors.lastname: Hamada
authors.forename: Kenzo
authors.initials: K
authors.lastname: Asaoka
authors.forename: Eiji
authors.initials: E
authors.lastname: Tanaka
mesh_terms: D001641:Bicuspid; D001840:Dental Bonding; D017005:Dental Debonding; D003743:Dental Enamel; D045662:Dental Etching / Q000379:methods*; D003799:Dental Stress Analysis; D006801:Humans; D008422:Materials Testing; D016910:Orthodontic Brackets; D019279:Resin Cements; D013499:Surface Properties
chemical_list: D019279:Resin Cements