Interfacial strength of Resilon and gutta-percha to intraradicular dentin

Andrea Gesi, Ornella Raffaelli, Cecilia Goracci, David H. Pashley, Franklin R. Tay, Marco Ferrari

Research output: Contribution to journalArticlepeer-review

144 Scopus citations


Strengthening of Resilon-filled roots via an adhesive interface should be reflected by improvement in the interfacial strength and dislocation resistance between the root fillings and intraradicular dentin. This study compared the interfacial strengths of Resilon/Epiphany and gutta-percha/AH Plus using a thin-slice push-out test design. Failure modes of root slices after push-out testing were examined with environmental scanning electron microscopy. The gutta-percha group exhibited significantly higher interfacial strength than the Resilon group, when premature failures that occurred in Resilon root slices were included in the statistical analysis. The gutta-percha root slices failed exclusively along the gutta-percha/sealer interface. The Resilon root slices failed predominantly along the sealer/dentin interface with recognizable, fractured resin tags. Detachment of the Resilon from the Epiphany sealer was also surprisingly observed in some specimens. The similarly low interfacial strengths achieved with both types of root filling challenges the concept of strengthening root-filled teeth with the new endodontic material.

Original languageEnglish (US)
Pages (from-to)809-813
Number of pages5
JournalJournal of endodontics
Issue number11
StatePublished - Nov 2005
Externally publishedYes


  • Environmental SEM
  • Gutta-percha
  • Interfacial strength
  • Push-out test
  • Resilon

ASJC Scopus subject areas

  • General Dentistry


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