Tubular occlusion optimizes bonding of hydrophobic resins to dentin

F. T. Sadek, David Henry Pashley, M. Ferrari, Franklin Chi Meng Tay

Research output: Contribution to journalArticlepeer-review

43 Scopus citations


Although hydrophobic resins may be bonded to acid-etched dentin with an ethanol wet-bonding technique, the protocol is sensitive to moisture contamination when bonding is performed in deep dentin. This study tested the hypothesis that the use of oxalate or poly(glutamic) acid-modified, diluted ceramicrete (PADC) for dentinal tubule occlusion prevents fluid contamination and improves the bonding of an experimental hydrophobic adhesive to acid-etched, ethanoldehydrated dentin. Mid-coronal and deep acidetched moist dentin pre-treated with oxalate or PADC was dehydrated by ethanol wet-bonding and infiltrated with the experimental three-step etch-and-rinse hydrophobic adhesive under simulated pulpal pressure. Tensile bond strengths to deep dentin without pre-treatment were severely compromised. Conversely, oxalate and PADC pre-treatments reduced dentin permeability, prevented water contamination, and improved bond strengths. Minimal nanoleakage was identified within hybrid layers created in the oxalate- and PADC-pre-treated deep dentin. The use of tubular occluding agents optimized bonding of hydrophobic resins to dentin.

Original languageEnglish (US)
Pages (from-to)524-528
Number of pages5
JournalJournal of Dental Research
Issue number6
StatePublished - Jun 2007


  • Ethanol wet-bonding
  • Hydrophobic resin
  • Oxalate
  • Pulpal pressure
  • Tubule occlusion

ASJC Scopus subject areas

  • Dentistry(all)


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