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The effects of various surface treatments on the shear bond strengths of stainless steel brackets to artificially-aged composite restorations.
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Eslamian, Ladan, Borzabadi-Farahani, Ali, Mousavi, Nasim and Ghasemi, Amir (2011) The effects of various surface treatments on the shear bond strengths of stainless steel brackets to artificially-aged composite restorations. Australian orthodontic journal, Volume 27 (Number 1). pp. 28-32. ISSN 0587-3908.
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Official URL: http://www.aso.org.au/AOJ/AOJ_docs/AOJ.htm
Abstract
Objective: To compare the shear bond strengths (SBS) of stainless steel brackets bonded to artificially-aged composite
restorations after different surface treatments.
Methods: Forty-five premolar teeth were restored with a nano-hybrid composite (Tetric EvoCeram), stored in deionised water for one week and randomly divided into three equal groups: Group I, the restorations were exposed to 5 per cent hydrofluoric acid for 60 seconds; Group II, the restorations were abraded with a micro-etcher (50 μm alumina particles); Group III, the restorations were roughened with a coarse diamond bur. Similar premolar brackets were bonded to each restoration using the same resin adhesive and the specimens were then cycled in deionised water between 5 °C and 55 °C (500 cycles). The shear bond strengths were determined with a universal testing machine at a crosshead speed of 1 mm/min. The teeth and brackets were examined under a stereomicroscope and the adhesive remnants on the teeth scored with the adhesive remnant index (ARI).
Results: Specimens treated with the diamond bur had a significantly higher SBS (Mean: 18.45 ± 3.82 MPa) than the
group treated with hydrofluoric acid (Mean: 12.85 ± 5.20 MPa). The mean SBS difference between the air-abrasion
(Mean: 15.36 ± 4.92 MPa) and hydrofluoric acid groups was not significant. High ARI scores occurred following abrasion
with a diamond bur (100 per cent) and micro-etcher (80 per cent). In approximately two thirds of the teeth no adhesive was left on the restoration after surface treatment with hydofluoric acid.
Conclusion: Surface treatment with a diamond bur resulted in a high bond strength between stainless steel brackets and
artificially-aged composite restorations and was considered to be a safe and effective method of surface treatment. Most of the adhesive remained on the tooth following surface treatment with either the micro-etcher or the diamond bur.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School | ||||
Journal or Publication Title: | Australian orthodontic journal | ||||
Publisher: | Australian Society of Orthodontists Inc. | ||||
ISSN: | 0587-3908 | ||||
Official Date: | May 2011 | ||||
Dates: |
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Volume: | Volume 27 | ||||
Number: | Number 1 | ||||
Page Range: | pp. 28-32 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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