Reversal of compromised bonding in bleached enamel

S. C.N. Lai, F. R. Tay, G. S.P. Cheung, Y. F. Mak, R. M. Carvalho, S. H.Y. Wei, M. Toledano, R. Osorio, D. H. Pashley

Research output: Contribution to journalArticle

151 Citations (Scopus)

Abstract

Oxygen inhibits polymerization of resin-based materials. We hypothesized that compromised bonding to bleached enamel can be reversed with sodium ascorbate, an anti-oxidant. Sandblasted human enamel specimens were treated with distilled water (control) and 10% carbamide peroxide gel with or without further treatment with 10% sodium ascorbate. They were bonded with Single Bond (3M-ESPE) or Prime&Bond NT (Dentsply DeTrey) and restored with a composite. Specimens were prepared for microtensile bond testing and transmission electron microscopy after immersion in ammoniacal silver nitrate for nanoleakage evaluation. Bond strengths of both adhesives were reduced after bleaching but were reversed following sodium ascorbate treatment (P < 0.001). Resin-enamel interfaces in bleached enamel exhibited more extensive nanoleakage in the form of isolated silver grains and bubble-like silver deposits. Reduction of resin-enamel bond strength in bleached etched enamel is likely to be caused by a delayed release of oxygen that affects the polymerization of resin components.

Original languageEnglish (US)
Pages (from-to)477-481
Number of pages5
JournalJournal of Dental Research
Volume81
Issue number7
DOIs
StatePublished - Jan 1 2002

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Dental Enamel
Ascorbic Acid
Silver
Polymerization
Oxygen
Silver Nitrate
Immersion
Transmission Electron Microscopy
Oxidants
Adhesives
Gels
Water

Keywords

  • Carbamide peroxide
  • Microtensile bond strength
  • Sodium ascorbate
  • Ultrastructure

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Lai, S. C. N., Tay, F. R., Cheung, G. S. P., Mak, Y. F., Carvalho, R. M., Wei, S. H. Y., ... Pashley, D. H. (2002). Reversal of compromised bonding in bleached enamel. Journal of Dental Research, 81(7), 477-481. https://doi.org/10.1177/154405910208100709

Reversal of compromised bonding in bleached enamel. / Lai, S. C.N.; Tay, F. R.; Cheung, G. S.P.; Mak, Y. F.; Carvalho, R. M.; Wei, S. H.Y.; Toledano, M.; Osorio, R.; Pashley, D. H.

In: Journal of Dental Research, Vol. 81, No. 7, 01.01.2002, p. 477-481.

Research output: Contribution to journalArticle

Lai, SCN, Tay, FR, Cheung, GSP, Mak, YF, Carvalho, RM, Wei, SHY, Toledano, M, Osorio, R & Pashley, DH 2002, 'Reversal of compromised bonding in bleached enamel', Journal of Dental Research, vol. 81, no. 7, pp. 477-481. https://doi.org/10.1177/154405910208100709
Lai SCN, Tay FR, Cheung GSP, Mak YF, Carvalho RM, Wei SHY et al. Reversal of compromised bonding in bleached enamel. Journal of Dental Research. 2002 Jan 1;81(7):477-481. https://doi.org/10.1177/154405910208100709
Lai, S. C.N. ; Tay, F. R. ; Cheung, G. S.P. ; Mak, Y. F. ; Carvalho, R. M. ; Wei, S. H.Y. ; Toledano, M. ; Osorio, R. ; Pashley, D. H. / Reversal of compromised bonding in bleached enamel. In: Journal of Dental Research. 2002 ; Vol. 81, No. 7. pp. 477-481.
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