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Home In vitro effects of several surface preparation methods on shear bond...

In vitro effects of several surface preparation methods on shear bond strength of orthodontic brackets to caries-like lesions of enamel

Authors:

  • M. Shahabi
    Dental Research Center, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
  • H. Moosavi
    Dental Material Research Center, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran
  • A. Gholami
    Dentist
  • F. Ahrari
    *Dental Research Center, School of Dentistry, Mashhad University of Medical Sciences, Mashhad, Iran

ABSTRACT


Aim

The aim of this study was to evaluate the efficiency of several surface preparation methods for improving shear bond strength of brackets to demineralised enamel.

Methods

Study design: in vitro study. Eighty premolars were selected and divided into 5 groups. Group 1 served as the control, while the remaining 4 groups were immersed in a demineralising solution (pH 4.8) for 12 weeks. In groups 1 (control) and 2 (demineralised/control) conventional acid etching was used. In group 3, a solution of 5 sodium hypochlorite (NaOCl) was applied on enamel surface for one minute after acid etching. The brackets in group 4 were bonded with Transbond Plus self-etching primer, and group 5 underwent treatment with a 2 sodium fluoride (NaF) gel, which was applied on the enamel surface for 4 minutes before etching. Shear bond strength (SBS) and adhesive remnant index (ARI) were determined in all groups, and surface morphology was examined under scanning electron microscope (SEM).

Results

The mean SBS of acid-etched demineralised enamel was significantly lower than that of acid-etched sound enamel (p<0.05). Treatment of caries-like lesions with 5% NaOCl or self-etching primer failed to improve the bond strength. After NaF treatment and acid etching of demineralised enamel, both type 1 and type 2 etching patterns were observed and the resulting SBS was comparable to that of sound enamel (p>0.05).

Conclusion

The application of 2 NaF on enamel caries before bracket bonding is an effective way for enhancing the bond strength.

PLUMX METRICS

Publication date:

Sep /2012

Keywords:

bond strength, bonding, caries-like lesion, demineralisation, demineralised enamel, self-etching primer, sodium fluoride, sodium hypochlorite

Issue:

Vol.13 – n.3/2012

Page:

197 – 202

Publisher:

Ariesdue

Cite:


Harvard: M. Shahabi, H. Moosavi, A. Gholami, F. Ahrari (2012) "In vitro effects of several surface preparation methods on shear bond strength of orthodontic brackets to caries-like lesions of enamel", European Journal of Paediatric Dentistry, 13(3), pp197-202. doi:
Vancouver: M. Shahabi, H. Moosavi, A. Gholami, F. Ahrari. In vitro effects of several surface preparation methods on shear bond strength of orthodontic brackets to caries-like lesions of enamel. European Journal of Paediatric Dentistry [Internet]. 2012Sep.1 [cited 2025May.14];13(3):197-202. Available from: https://www.ejpd.eu/abstract-pubmed/in-vitro-effects-of-several-surface-preparation-methods-on-shear-bond-strength-of-orthodontic-brackets-to-caries-like-lesions-of-enamel/
MLA: M. Shahabi, H. Moosavi, A. Gholami, F. Ahrari In vitro effects of several surface preparation methods on shear bond strength of orthodontic brackets to caries-like lesions of enamel. European Journal of Paediatric Dentistry. 2012;13(3):197-202

Copyright (c) 2021 Ariesdue

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

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    European Journal of Paediatric Dentistry © | ISSN (Online): 2035-648X
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