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01-07-2019 | Original Article

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

Authors: Nikolaos Daratsianos, Beke Schütz, Susanne Reimann, Anna Weber, Spyridon N. Papageorgiou, Andreas Jäger, Christoph Bourauel

Published in: Clinical Oral Investigations | Issue 7/2019

Abstract

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 Al₂O₃ at 1.2 bar (s), acid etching with 37.4% phosphoric acid (a), sandblasting with 27 μm Al₂O₃ at 1.2 bar followed by acid etching (s1a), and sandblasting with 50 μm Al₂O₃ 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 < 0.001). Likewise, the ARI analysis indicated a different performance of the s group (mostly ARI of 0) compared to the other groups (p < 0.001) and a tendency for different ARI between the a and s1a/s2a groups.

Conclusions

In vitro enamel sandblasting could not substitute acid etching and did not offer improved SBS when used before acid etching, regardless of air pressure and powder granulation. Sandblasting without acid etching produced less residual resin on the tooth after debonding.

Clinical relevance

The clinical use of adjunct enamel sandblasting prior to etching to enhance SBS has to be questioned.

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Title: 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
Authors: Nikolaos Daratsianos
Beke Schütz
Susanne Reimann
Anna Weber
Spyridon N. Papageorgiou
Andreas Jäger
Christoph Bourauel
Publication date: 01-07-2019
Publisher: Springer Berlin Heidelberg
Published in: Clinical Oral Investigations / Issue 7/2019
Print ISSN: 1432-6981
Electronic ISSN: 1436-3771
DOI: https://doi.org/10.1007/s00784-018-2692-7

At a glance: The STEP trials

Springer Medicine

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

Abstract

Objectives

Materials and methods

Results

Conclusions

Clinical relevance

At a glance: The STEP trials

Springer Medicine

Abstract

Objectives

Materials and methods

Results

Conclusions

Clinical relevance

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