Bonding to Ground Dentin by a Phenyl-P Self -etching Primer

I. Watanabe, N. Nakabayashi, D. H. Pashley

Research output: Contribution to journalArticlepeer-review

368 Scopus citations


Increasingly higher concentrations of Phenyl-P in 30% HEMA were used as dentin conditioners to improve the bonding of adhesive resins to smear layers. The maximum bond strength (10.4 MPa) was obtained at a concentration of 20% Phenyl-P. Transmission electron microscopy of fractured, lightly smeared, and compactly smeared dentin demonstrated that 20% Phenyl-P in 30% HEMA demineralized the dentin surface by partially dissolving mineral crystals from around collagen. When applied to smear layers, this resin system demineralized the smear layer and incorporated it into the applied resin which penetrated a short distance into the underlying dentin, thereby creating a hybrid layer that contained the original smear layer. This single-step conditioner/primer offers several advantages over previous bonding systems by permitting a single solution to serve as both a conditioner and a primer.

Original languageEnglish (US)
Pages (from-to)1212-1220
Number of pages9
JournalJournal of Dental Research
Issue number6
StatePublished - Jun 1994


  • Bonding
  • Collagen
  • Dentin
  • Resins
  • Smear Layer

ASJC Scopus subject areas

  • Dentistry(all)


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