The influence of enamel sandblasting on the shear bond strength and fractography of the bracket-adhesive-enamel complex tested in vitro by the DIN 13990:2017-04 standard

• Published in: Clinical oral investigations 2019-07, Vol.23 (7), p.2975-2985
• Main Authors: Daratsianos, Nikolaos, Schütz, Beke, Reimann, Susanne, Weber, Anna, Papageorgiou, Spyridon N., Jäger, Andreas, Bourauel, Christoph
• Format: Article
• Language: English
• Subjects: Acid Etching, Dental; Acids; Adhesives; Aluminum oxide; Animals; Bond strength; Cattle; Dental Bonding; Dental Cements; Dental Enamel; Dental Stress Analysis; Dentistry; Enamel; Etching; Incisors; Materials Testing; Medicine; Original Article; Orthodontic Brackets; Orthodontics; Phosphoric acid; Powder; Resin Cements; Shear Strength; Stress, Mechanical; Surface Properties; Teeth
• ISSN: 1432-6981; 1436-3771
• DOI: 10.1007/s00784-018-2692-7

Objectives This study was conducted in order to investigate whether enamel sandblasting as an adjunct or substitute to the acid-etch technique has an effect on the shear bond strength (SBS) and fractography of the bracket-adhesive-enamel complex using the DIN 13990:2017-04 standard. Materials and methods Upper central incisor brackets (discovery®, Dentaurum, Germany) were bonded using Transbond XT™ (3M Unitek, Germany) on bovine incisors prepared by four different methods (15 samples each): sandblasting with 27 μm Al 2 O 3 at 1.2 bar (s), acid etching with 37.4% phosphoric acid (a), sandblasting with 27 μm Al 2 O 3 at 1.2 bar followed by acid etching (s1a), and sandblasting with 50 μm Al 2 O 3 at 5.7 bar followed by acid etching (s2a). The SBS and adhesive remnant index (ARI) were measured, followed by one-way analysis of variance and Fisher’s exact tests at 5%. Results The SBS in groups s (5.6 ± 2.2 MPa), a (17.1 ± 4.3 MPa), s1a (18.3 ± 4.3 MPa), and s2a (18.5 ± 4.6 MPa) indicated that the s group was significantly inferior to all the other groups ( p