A nanoleakage perspective on bonding to oxidized dentin

C. K.Y. Yiu, F. García-Godoy, Franklin Chi Meng Tay, David Henry Pashley, S. Imazato, N. M. King, S. C.N. Lai

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

The mechanism responsible for sodium-hypochlorite-induced reduction in dentin bond strength and its reversal with reducing agents is unknown. This study examined the relationship between nanoleakage and reversal of compromised bonding to oxidized dentin. Acid-etched dentin was completely depleted of demineralized collagen matrix when sodium hypochlorite was used. Specimens were bonded with two single-bottle dentin adhesives. They were immersed in ammoniacal silver nitrate for 24 hrs before being processed for transmission electron microscopy. For both adhesives, tensile bond strengths of acid-etched dentin were significantly reduced after sodium hypochlorite treatment, but were reversed when sodium ascorbate was used. After sodium hypochlorite application, reticular nanoleakge patterns in hybrid layers were replaced by vertical, shag-carpet-like patterns along the demineralization front. This type of nanoleakage was completely eliminated after sodium ascorbate treatment with the materials tested. Residual sodium hypochlorite within the porosities of mineralized dentin may result in incomplete resin polymerization, and hence compromised bond strength.

Original languageEnglish (US)
Pages (from-to)628-632
Number of pages5
JournalJournal of Dental Research
Volume81
Issue number9
DOIs
StatePublished - Jan 1 2002

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Sodium Hypochlorite
Dentin
Adhesives
Ascorbic Acid
Silver Nitrate
Acids
Tensile Strength
Porosity
Reducing Agents
Transmission Electron Microscopy
Polymerization
Collagen

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Yiu, C. K. Y., García-Godoy, F., Tay, F. C. M., Pashley, D. H., Imazato, S., King, N. M., & Lai, S. C. N. (2002). A nanoleakage perspective on bonding to oxidized dentin. Journal of Dental Research, 81(9), 628-632. https://doi.org/10.1177/154405910208100910

A nanoleakage perspective on bonding to oxidized dentin. / Yiu, C. K.Y.; García-Godoy, F.; Tay, Franklin Chi Meng; Pashley, David Henry; Imazato, S.; King, N. M.; Lai, S. C.N.

In: Journal of Dental Research, Vol. 81, No. 9, 01.01.2002, p. 628-632.

Research output: Contribution to journalArticle

Yiu, CKY, García-Godoy, F, Tay, FCM, Pashley, DH, Imazato, S, King, NM & Lai, SCN 2002, 'A nanoleakage perspective on bonding to oxidized dentin', Journal of Dental Research, vol. 81, no. 9, pp. 628-632. https://doi.org/10.1177/154405910208100910
Yiu CKY, García-Godoy F, Tay FCM, Pashley DH, Imazato S, King NM et al. A nanoleakage perspective on bonding to oxidized dentin. Journal of Dental Research. 2002 Jan 1;81(9):628-632. https://doi.org/10.1177/154405910208100910
Yiu, C. K.Y. ; García-Godoy, F. ; Tay, Franklin Chi Meng ; Pashley, David Henry ; Imazato, S. ; King, N. M. ; Lai, S. C.N. / A nanoleakage perspective on bonding to oxidized dentin. In: Journal of Dental Research. 2002 ; Vol. 81, No. 9. pp. 628-632.
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