Dentine sealing provided by smear layer/smear plugs vs. adhesive resins/resin tags

Marcela R. Carrilho, Franklin R. Tay, Jeremy Sword, Adam M. Donnelly, Kelli A. Agee, Yoshihiro Nishitani, Fernanda T. Sadek, Ricardo M. Carvalho, David H. Pashley

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)

Abstract

The aim of this study was to evaluate the ability of five experimental resins, which ranged from hydrophobic to hydrophilic blends, to seal acid-etched dentine saturated with water or ethanol. The experimental resins (R1, R2, R3, R4, and R5) were evaluated as neat bonding agents (100% resin) or as solutions solvated with absolute ethanol (70% resin/30% ethanol). Fluid conductance was measured at 20 cm H2O hydrostatic pressure after sound dentine surfaces were: (i) covered with a smear layer; (ii) acid-etched; or (iii) bonded with neat or solvated resins, which were applied to acid-etched dentine saturated with water or ethanol. In general, the fluid conductance of resin-bonded dentine was significantly higher than that of smear layer-covered dentine. However, when the most hydrophobic neat resins (R1 and R2) were applied to acid-etched dentine saturated with ethanol, the fluid conductance was as low as that produced by smear layers. The fluid conductance of resin-bonded dentine saturated with ethanol was significantly lower than for resin bonded to water-saturated dentine, except for resin R4. Application of more hydrophobic resins may provide better sealing of acid-etched dentine if the substrate is saturated with ethanol instead of with water.

Original languageEnglish
Pages (from-to)321-329
Number of pages9
JournalEuropean Journal of Oral Sciences
Volume115
Issue number4
DOIs
Publication statusPublished - Aug 2007

Keywords

  • Dentine permeability
  • Dentine sealing
  • Ethanol-saturated dentine
  • Resin permeability
  • Smear layer

ASJC Scopus subject areas

  • Dentistry(all)

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