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VOLUME 13 , ISSUE 3 ( May-June, 2012 ) > List of Articles

RESEARCH ARTICLE

Surface Morphological Changes in Human Enamel Following Bleaching: An in vitro Scanning Electron Microscopic Study

LM Ranganath, B Sunil Rao, AG Rajesh, KS Prem Kumar

Citation Information : Ranganath L, Rao BS, Rajesh A, Kumar KP. Surface Morphological Changes in Human Enamel Following Bleaching: An in vitro Scanning Electron Microscopic Study. J Contemp Dent Pract 2012; 13 (3):405-415.

DOI: 10.5005/jp-journals-10024-1159

License: CC BY-NC 3.0

Published Online: 01-09-2010

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


Abstract

Objective

The purpose of this study was to evaluate, using scanning electron microscopy (SEM), the morphological and structural changes of the enamel induced by three bleaching agents namely old McInnes solution, modified McInnes solution and 10% carbamide peroxide gel at different time intervals.

Materials and methods

Fifteen freshly extracted noncarious human central incisors with intact enamel surface were selected. The teeth were sectioned at the cementoenamel junction separating the crown portion from the root using a diamond separating disk. Following this, the samples were subjected to three different bleaching agents: Group 1: Old McInnes solution, group 2: modified McInnes solution and group 3: 10% carbamide peroxide for a period of 15, 30 and 60 minutes, 24 and 30 hours time interval. The sample stubs were subjected to scanning electron microscope and were photographed at 2000 and 10,000 magnifications.

Conclusion

The present study revealed no indication of either etching or significant change in surface morphology of enamel when evaluated under scanning electron microscope after 6 weeks treatment with various bleaching agents.

Clinical significance

Morphological alterations in bleached enamel are both concentration and time dependent.

How to cite this article

Rajesh AG, Ranganath LM, Kumar KSP, Rao BS. Surface Morphological Changes in Human Enamel Following Bleaching: An in vitro Scanning Electron Microscopic Study. J Contemp Dent Pract 2012;13(3):405-415.


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  1. Monitoring of demineralized dentin microhardness throughout and after bleaching. Am J Dent 2004;17:342-46.
  2. Improvement of bonding to bleached bovine tooth surfaces by ascorbic acid treatment. Dent Mater J 2007;26:875-81.
  3. Reversal of compromised bonding to oxidized etched dentin. J Dent Res 2001;80:1919-24.
  4. Reversal of compromised bonding in bleached enamel. J Dent Res 2002;81:477-81.
  5. Microhardness evaluation of in situ vital bleaching on human dental enamel using a novel study design. Dent Mater 2005;21:1059-67.
  6. Effect on enamel microhardness of two consumer—available bleaching solutions when compared with a dentist-prescribed, home applied bleaching solution and a control. J Esthet Restor Dent 2005;17:343-50.
  7. Carbamide peroxide bleaching: Effects on enamels surface hardness and bonding. Oper Dent 1992;17:181-85.
  8. Effects of external bleaching on indentation and abrasion characteristics of human enamel in vitro. J Dent Res 1992;71:1340-44.
  9. AFM characterization of bovine enamel and dentine after acid-etching. Micron 2009;40:502-06.
  10. Effects of a carbamide peroxide agent and desensitizing dentifrices on enamel microhardness. Am J Dent 2003;16:42-46.
  11. Nightguard vital bleaching: Effects on enamel surface texture and diffusion. Quintessence Int 1990;21:801-04.
  12. Peroxide interactions with hard tissues: Effects on surface hardness and surface/subsurface ultrastructural properties. Compend Contin Educ Dent 2002,23:42-48.
  13. The efficacy of three different in office bleaching systems and their effect on enamel microhardness. Oper Dent 2008;33:579-86.
  14. Association effect of in-office and nightguard vital bleaching on dental enamel microhardness. Braz J Oral Sci 2002:365-69.
  15. Effect of bleaching on microhardness, morphology, and color of enamel. Gen Dent 1995;43:158-60.
  16. Effect of hydrogen peroxide based home bleaching agents on enamel hardness. Braz J Oral Sci 2006;5:1090-93.
  17. Microleakage evaluation of in situ vital bleaching and thicknening agents on human dental enamel. Int J Periodontics Restorative Dent 2010;30:203-11.
  18. At-home use of 35% carbamide peroxide bleaching gel: A case report. Compend Contin Educ Dent 1998;19:824-29.
  19. Use of different concentrations of carbamide peroxide for bleaching teeth: An in vitro study. Quintessence Int 1998;29:503-07.
  20. A scanning electron microscopy study of the effect of bleaching agents on enamel: a preliminary report. J Prosthet Dent 1992;67:852-55.
  21. Alterations in human enamel surface morphology following vital bleaching. J Prosthet Dent 1992;68:754-60.
  22. Effect of 10% carbamide peroxide bleaching gel on enamel microhardness, microstructure, and mineral content. J Endod 2000;26:203-06.
  23. Changes in surface morphology and mineralization level of human enamel following in-office bleaching with 35% hydrogen peroxide and light irradiation. Gen Dent 2010;58:e74-79.
  24. Effects of dental bleaching on micro-and nano-morphological alterations of the enamel surface. Am J Dent 2007;20:35-40.
  25. In: Roberson TM, Heymann HO, Swift Jr EJ, (Eds). Sturdevant's Art and Science of Operative Dentistry. St Louis, Mosby Inc 2006;15-64.
  26. Effect of bleaching agents on chemical composition of enamel. Mississippi Dental Association Journal 1997;53(1):20-21.
  27. Complete Dental Bleaching. Chicago Quintessence 1995;p 165.
  28. Effects of 10% carbamide peroxide on the subsurface hardness of enamel. Quintessence International 2010;26(1):21-24.
  29. Carbamide peroxide bleaching: Effects on enamel surface hardness and bonding. Operative Dentistry 2011;17(5):181-85.
  30. Effects of 10% carbamide peroxide bleaching on enamel microhardness. American Journal of Dentistry 2003;14(2):67-71.
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