Effects of HEMA/solvent combinations on bond strength to dentin

R. M. Carvalho, J. S. Mendonça, S. L. Santiago, R. R. Silveira, F. C.P. Garcia, F. R. Tay, D. H. Pashley

Research output: Contribution to journalArticlepeer-review

127 Scopus citations


Re-expansion of dried demineralized dentin is required to optimize resin adhesion. This study tested the hypothesis that bond strengths to dentin depend upon the ability of experimental HEMA(2-hydroxy-ethyl-methacrylate)/solvent primers to re-expand the matrix. Dentin surfaces were acid-etched with 37% phosphoric acid for 20 sec, air-dried for 30 sec, primed with either 35/65% (v/v) HEMA/water, HEMA/methanol, HEMA/ethanol, or HEMA/propanol for 60 sec, and bonded with 4-META-TBBO(4-methacryloyloxyethyl trimellitate anhydride-tri-n- butyl borane) adhesive. After storage in water for 1 day at 37°C, the samples were prepared for microtensile bond strength testing. We used transmission electron microscopy to measure the width of interfibrillar spaces in the hybrid layers. The HEMA/ethanol primer and the HEMA/propanol primer produced the highest and the lowest bond strengths, respectively (p < 0.05). Bond strengths were directly correlated with the width of the interfibrillar spaces (p < 0.05). Bond strengths are related to the ability of the primer to maintain the re-expansion of collapsed demineralized dentin matrix.

Original languageEnglish (US)
Pages (from-to)597-601
Number of pages5
JournalJournal of Dental Research
Issue number8
StatePublished - Aug 2003


  • Dentin
  • Microtensile bond strength
  • Solvents

ASJC Scopus subject areas

  • General Dentistry


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