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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


Daratsianos, Nikolaos; Schütz, Beke; Reimann, Susanne; Weber, Anna; Papageorgiou, Spyridon N; Jäger, Andreas; Bourauel, Christoph (2019). 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. Clinical Oral Investigations, 23(7):2975-2985.

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 AlO at 1.2 bar (s), acid etching with 37.4% phosphoric acid (a), sandblasting with 27 μm AlO at 1.2 bar followed by acid etching (s1a), and sandblasting with 50 μm AlO 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.

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 AlO at 1.2 bar (s), acid etching with 37.4% phosphoric acid (a), sandblasting with 27 μm AlO at 1.2 bar followed by acid etching (s1a), and sandblasting with 50 μm AlO 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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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Center for Dental Medicine > Clinic for Orthodontics and Pediatric Dentistry
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:July 2019
Deposited On:18 Mar 2019 09:57
Last Modified:09 Jun 2019 01:03
Publisher:Springer
ISSN:1432-6981
OA Status:Closed
Publisher DOI:https://doi.org/10.1007/s00784-018-2692-7
PubMed ID:30426265

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