Effect of fluoride-releasing liner on demineralized dentin

Toshiyuki Itota, Satoshi Nakabo, Yasuhiro Torii, Tomoko Narukami, Junichi Doi, Masahiro Yoshiyama

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Objective: The aim of this study was to evaluate the remineralization of residual demineralized dentin underneath restorations by fluoride-releasing liners in vitro. Method and materials: Two glass-ionomer cement liners, Lining Cement (GC) and RK-141A (GC), and two light-cured resin liners with and without 5 wt% NaF were used in this study. The resin liners were made by mixing TEGDMA and bis-GMA. Class 5 cavities were prepared on extracted human premolars. Demineralized dentin was promoted by using a bacterial caries induction system at the cavity floor. Cavities were restored with a resin composite following application of each liner. Specimens were then stored for 4 weeks at 37°C and 100% humidity. After storage, the specimens were cut through the restorations, and axial sections of about 80-μm thickness were prepared. Contact microradiographs were taken, and the radiopacity of the demineralized dentin layer underneath the liner was analyzed. Results: The ratios of radiopacity of demineralized dentin under the fluoride-releasing liners were significantly higher than those under the resin liner without fluoride release. Although the amounts of fluoride release from the glass-ionomer cement liners were lower than that from the resin liner with fluoride release, there were no significant differences in the ratios of radiopacity in demineralized dentin layers among the 3 liners with fluoride release. Conclusion: Although the fluoride released from liners can enhance remineralization of demineralized dentin, the amount of fluoride release does not affect the ratio of radiopacity in the remineralized dentin.

Original languageEnglish
Pages (from-to)297-303
Number of pages7
JournalQuintessence International
Volume37
Issue number4
Publication statusPublished - Apr 2006

Fingerprint

Dentin
Fluorides
Glass Ionomer Cements
Bisphenol A-Glycidyl Methacrylate
Composite Resins
Bicuspid
Humidity
Light

Keywords

  • Caries
  • Demineralized dentin
  • Fluoride
  • Glass-ionomer cement
  • Liner
  • Remineralization
  • Resin

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

Effect of fluoride-releasing liner on demineralized dentin. / Itota, Toshiyuki; Nakabo, Satoshi; Torii, Yasuhiro; Narukami, Tomoko; Doi, Junichi; Yoshiyama, Masahiro.

In: Quintessence International, Vol. 37, No. 4, 04.2006, p. 297-303.

Research output: Contribution to journalArticle

Itota, T, Nakabo, S, Torii, Y, Narukami, T, Doi, J & Yoshiyama, M 2006, 'Effect of fluoride-releasing liner on demineralized dentin', Quintessence International, vol. 37, no. 4, pp. 297-303.
Itota, Toshiyuki ; Nakabo, Satoshi ; Torii, Yasuhiro ; Narukami, Tomoko ; Doi, Junichi ; Yoshiyama, Masahiro. / Effect of fluoride-releasing liner on demineralized dentin. In: Quintessence International. 2006 ; Vol. 37, No. 4. pp. 297-303.
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AU - Doi, Junichi

AU - Yoshiyama, Masahiro

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N2 - Objective: The aim of this study was to evaluate the remineralization of residual demineralized dentin underneath restorations by fluoride-releasing liners in vitro. Method and materials: Two glass-ionomer cement liners, Lining Cement (GC) and RK-141A (GC), and two light-cured resin liners with and without 5 wt% NaF were used in this study. The resin liners were made by mixing TEGDMA and bis-GMA. Class 5 cavities were prepared on extracted human premolars. Demineralized dentin was promoted by using a bacterial caries induction system at the cavity floor. Cavities were restored with a resin composite following application of each liner. Specimens were then stored for 4 weeks at 37°C and 100% humidity. After storage, the specimens were cut through the restorations, and axial sections of about 80-μm thickness were prepared. Contact microradiographs were taken, and the radiopacity of the demineralized dentin layer underneath the liner was analyzed. Results: The ratios of radiopacity of demineralized dentin under the fluoride-releasing liners were significantly higher than those under the resin liner without fluoride release. Although the amounts of fluoride release from the glass-ionomer cement liners were lower than that from the resin liner with fluoride release, there were no significant differences in the ratios of radiopacity in demineralized dentin layers among the 3 liners with fluoride release. Conclusion: Although the fluoride released from liners can enhance remineralization of demineralized dentin, the amount of fluoride release does not affect the ratio of radiopacity in the remineralized dentin.

AB - Objective: The aim of this study was to evaluate the remineralization of residual demineralized dentin underneath restorations by fluoride-releasing liners in vitro. Method and materials: Two glass-ionomer cement liners, Lining Cement (GC) and RK-141A (GC), and two light-cured resin liners with and without 5 wt% NaF were used in this study. The resin liners were made by mixing TEGDMA and bis-GMA. Class 5 cavities were prepared on extracted human premolars. Demineralized dentin was promoted by using a bacterial caries induction system at the cavity floor. Cavities were restored with a resin composite following application of each liner. Specimens were then stored for 4 weeks at 37°C and 100% humidity. After storage, the specimens were cut through the restorations, and axial sections of about 80-μm thickness were prepared. Contact microradiographs were taken, and the radiopacity of the demineralized dentin layer underneath the liner was analyzed. Results: The ratios of radiopacity of demineralized dentin under the fluoride-releasing liners were significantly higher than those under the resin liner without fluoride release. Although the amounts of fluoride release from the glass-ionomer cement liners were lower than that from the resin liner with fluoride release, there were no significant differences in the ratios of radiopacity in demineralized dentin layers among the 3 liners with fluoride release. Conclusion: Although the fluoride released from liners can enhance remineralization of demineralized dentin, the amount of fluoride release does not affect the ratio of radiopacity in the remineralized dentin.

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KW - Liner

KW - Remineralization

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