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A comparative study of shear bond strength between metal and ceramic brackets and artificially aged composite restorations using different surface treatments
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Eslamian, L., Borzabadi-Farahani, Ali, Mousavi, N. and Ghasemi, A. (2012) A comparative study of shear bond strength between metal and ceramic brackets and artificially aged composite restorations using different surface treatments. The European Journal of Orthodontics, Volume 34 (Number 5). pp. 610-617. doi:10.1093/ejo/cjr044 ISSN 0141-5387.
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Official URL: http://dx.doi.org/10.1093/ejo/cjr044
Abstract
This in vitro study evaluated the shear bond strength (SBS) between ceramic brackets (CBs) and resin composite restorations (RCRs) prepared using different surface treatments. The findings were also compared with a similar study that used stainless steel brackets (SSBs). Forty-five premolars were restored with a nano-hybrid composite resin (Tetric EvoCeram) and randomly assigned to three surface treatment groups: group 1, 5 per cent hydrofluoric acid (HF); group 2, air abrasion (50 μm alumina particles); and group 3, diamond bur. Specimens were bonded with CBs (Fascination) and exposed to thermo-cycling (500 cycles). The shear force at a crosshead speed of 1 mm/minute was transmitted to brackets. The adhesive remnant index (ARIs) scores were recorded after bracket failure. The analysis of SBS variance (P < 0.01) and chi-square test of ARIs scores (P < 0.01) revealed significant differences among three groups tested. The SBS in group 3 (mean: 26.34 ± 4.76 MPa) and group 2 (mean: 26.68 ± 5.93 MPa) was significantly higher than group 1 (mean: 16.25 ± 5.42 MPa). The SBS was significantly higher in CBs (mean: 23.09 ± 7.19 MPa) compared to SSBs (mean: 15.56 ± 5.13 MPa). High ARIs (100 per cent) occurred in SSBs treated with a diamond bur, whereas CBs primarily failed at the resin–adhesive interface (P < 0.01). In two-thirds of the specimens (SSBs or CBs), no adhesive was left on the restoration after HF conditioning. The ARIs profile of CBs and SSBs that received surface treatments with air abrasion were similar (P > 0.05) and bond failure occurred mainly in adhesive–bracket base and resin–adhesive interfaces. The diamond bur surface treatment is recommended as a safe and cost-effective method of bonding CBs to RCRs.
Item Type: | Journal Article | ||||
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Divisions: | Faculty of Science, Engineering and Medicine > Medicine > Warwick Medical School | ||||
Journal or Publication Title: | The European Journal of Orthodontics | ||||
Publisher: | Oxford University Press | ||||
ISSN: | 0141-5387 | ||||
Official Date: | 5 October 2012 | ||||
Dates: |
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Volume: | Volume 34 | ||||
Number: | Number 5 | ||||
Page Range: | pp. 610-617 | ||||
DOI: | 10.1093/ejo/cjr044 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access |
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