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VOLUME 3 , ISSUE 1 ( January-March, 2012 ) > List of Articles

RESEARCH ARTICLE

Effect of Self-etchant pH on Shear Bond Strength of Orthodontic Brackets: An in vitro Study

BM Shivalinga, H Jyothikiran, Amit Goyal

Citation Information : Shivalinga B, Jyothikiran H, Goyal A. Effect of Self-etchant pH on Shear Bond Strength of Orthodontic Brackets: An in vitro Study. World J Dent 2012; 3 (1):41-49.

DOI: 10.5005/jp-journals-10015-1126

Published Online: 01-06-2013

Copyright Statement:  Copyright © 2012; The Author(s).


Abstract

Aims

To determine the effect of self-etchant pH on shear bond strength of orthodontic brackets; to compare the shear bond strengths of brackets bonded with three SEPs and brackets bonded with conventional etch, rinse, bond method and to find the brackets/adhesive failure mode.

Materials and methods

One hundred and twenty premolar teeth were cleaned, mounted, and randomly divided into four groups of 30 samples each- Transbond XT conventional etch and bond system (control), Adper SE Plus SEP (3M ESPE) with a pH of 0.9 to 1.0, Transbond Plus SEP (3M Unitek) with a pH of about 1.0 and Clearfil SE Bond SEP (Kuraray America) with a pH of around 2.0. All teeth were bonded with Transbond XT paste (3M Unitek). The teeth were debonded within half an hour after initial bonding by using a universal testing machine. The residual adhesive on each tooth was evaluated. ANOVA was used to compare the shear bond strength (SBS) of the three groups, and the Chi-square test was used to compare the adhesive remnant index (ARI) scores for the three groups.

Results

ANOVA indicated significant differences between the groups. Clearfil attained the SBS (6.5 ± 0.6689 MPa) closest to the control group, whereas Adper inspite of being the most aggressive recorded the lowest SBS (5.7 ± 0.5695 MPa). Transbond self-etching primer achieved a mean SBS of 6.1 ± 0.6211 MPa. However, all the three SEPs recorded SBS which was significantly less than that of Transbond conventional etch, rinse and bond system (11.8027 ± 0.8059 MPa). The comparisons of the ARI scores between the three groups indicated that bracket failure mode was significantly different between the three groups (p < 0.05).

Conclusion

These findings show that factors other than pH, such as the ability of the bonding adhesive to form a chemical bond to enamel and the strength of the bonding adhesive itself, significantly influence the SBS of orthodontic brackets.

How to cite this article

Goyal A, Jyothikiran H, Shivalinga BM. Effect of Self-etchant pH on Shear Bond Strength of Orthodontic Brackets: An in vitro Study. World J Dent 2012;3(1):41-49.


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  1. Adhesive bonding of various materials to hard tooth tissues. I Method of determining bond strength. J Dent Res 1965;44:690
  2. Adhesive bonding of various materials to hard tooth tissues. II. Bonding to dentin promoted by a surface-active comonomer. J Dent Res 1965;44:895
  3. Adhesive bonding of various materials to hard tooth tissues. III. Bonding to dentin improved by pretreatment and the use of surface-active comonomer. J Dent Res 1965;44:903
  4. Adhesive bonding of various materials to hard tooth tissues IV. Bonding to dentin, enamel and fluorapatite improved by the use of a surface-active comonomer. J Dent Res 1965;44:906
  5. A simple method of increasing the adhesion of acrylic filling materials to enamel surfaces. J Dent Res 1955;34:849-53.
  6. Adhesion of mesh-base direct-bonding brackets. Am J Orthod 1979;75:421-30.
  7. Bonding metal brackets with a self-polymerizing sealant-composite: A 12-month assessment. Am J Orthod 1977;71:542-53.
  8. The effect of wear, acid etching and bond removal on human enamel. Am J orthod 1977;72(6): 671-81.
  9. Shear bond strength of composite, glass ionomer, and acidic primer adhesive systems. Am J Orthod Dentofacial Orthop Jan 1999;115(1): 24-28.
  10. Effect of a self-etch primer/adhesive on the shear bond strength of orthodontic brackets. Am J Orthod Dentofacial Orthop Jun 2001;119(6):621-24.
  11. Available at http://www3.3m.com/search/ww/en001/msdssearchform.do. Accessed May 13, 2010.
  12. John J Effect of self-etchant pH on the shear bond strength of orthodontic brackets. Am J Orthod 2008;134:203-08.
  13. Available at http://www.kuraraydental.com/products/19/se_bond_primer_(usa).pdf. Accessed May 13, 2010.
  14. Clinical trials with crystal growth conditioning as an alternative to acid etch enamel treatment. Am J Orthod 1984;85:333-40.
  15. Buonocore memorial lecture. Adhesion to enamel and dentin: Current status and future challenges. Oper Dent May-Jun 2003;28(3):215-35.
  16. SEM evaluation of contemporary self-etching primers applied to ground and unground enamel. J Adhes Dent Autumn 2005;7(3):203-11.
  17. An ultrastructural study of the influence of acidity of self-etching primers and smear layer thickness on bonding to intact dentin. J Adhes Dent Summer 2000;2(2):83-98.
  18. One-day bonding effectiveness of new self-etch adhesives to bur-cut enamel and dentin. Oper Dent Jan-Feb 2005;30(1):39-49.
  19. Aggressiveness of contemporary selfetching systems. I: Depth of penetration beyond dentin smear layers. Dent Mater Jul 2001;17(4):296-308.
  20. Aggressiveness of contemporary selfetching adhesives. Part II: Etching effects on unground enamel. Dent Mater Sep 2001;17(5):430-44.
  21. Microscopic evaluation of dentin interface obtained with 10 contemporary self-etching systems: Correlation with their pH. Oper Dent Jul-Aug 2005;30(4):481-91.
  22. Effects of a self-etching primer on enamel shear bond strengths and SEM morphology. Am J Dent 1997;10: 141-46.
  23. Tensile bond strength to and SEM evaluation of ground and intact enamel surfaces. J Dent 1999;27:523-30.
  24. Bond strength versus dentine structure: A modelling approach. Arch Oral Biol 1995;40:1109-18.
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