A simple etching technique for improving the retention of fiber posts to resin composites

Francesca Monticelli, Manuel Toledano, Franklin R. Tay, Fernanda T. Sadek, Cecilia Goracci, Marco Ferrari

Research output: Contribution to journalArticlepeer-review

87 Scopus citations


Coupling of fiber posts to composites is hampered by absence of chemical union between epoxy resins and methacrylate-based resins. This study examined a clinically feasible protocol for creating micromechanical retention on the surface of fiber posts, using hydrogen peroxide etching to remove the surface layer of epoxy resin. This was followed by silanization of the exposed quartz fibers to enhance their chemical bonding to composites. Etching with 24% H 2O2 for 10 min or 10% H2O2 for 20 min produced a 50 μm thick surface zone that is depleted of epoxy resin, leaving intact, undamaged quartz fibers for silanization. Low viscosity flowable composites were employed to infiltrate this zone, to simulate the creation of hybrid layers in acid-etched dentin by dentin adhesives. Interfacial strengths were enhanced with the adjunctive use of H2O2 etching and silanization, and were probably dependent on the ability of the flowable composites to completely infiltrate this interdiffusion zone.

Original languageEnglish (US)
Pages (from-to)44-47
Number of pages4
JournalJournal of endodontics
Issue number1
StatePublished - Jan 2006
Externally publishedYes


  • Fiber post
  • Flowable composite
  • Hydrogen peroxide etching
  • Interfacial strength
  • Silane

ASJC Scopus subject areas

  • Dentistry(all)


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