Sealing properties of one-step root-filling fibre post-obturators vs. two-step delayed fibre post-placement

Francesca Monticelli, Raquel Osorio, Manuel Toledano, Marco Ferrari, David Henry Pashley, Franklin Chi Meng Tay

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Objectives: The sealing properties of a one-step obturation post-placement technique consisting of Resilon-capped fibre post-obturators were compared with a two-step technique based on initial Resilon root filling following by 24 h-delayed fibre post-placement. Methods: Thirty root segments were shaped to size 40, 0.04 taper and filled with: (1) InnoEndo obturators; (2) Resilon/24 h-delayed FibreKor post-cementation. Obturator, root filling and post-cementation procedures were performed using InnoEndo bonding agent/ dual-cured root canal sealer. Fluid flow rate through the filled roots was evaluated at 10 psi using a computerised fluid filtration model before root resection and after 3 and 9 mmapical resections. Fluid flow data were analysed using two-way repeated measures ANOVA and Tukey test to examine the effects of root-filling post-placement techniques and root resection lengths on fluid leakage from the filled canals (a = 0.05). Results: A significantly greater amount of fluid leakage was observed with the one-step technique when compared with two-step technique. No difference in fluid leakage was observed among intact canals and canals resected at different lengths for both materials. Conclusions: The seal of root canals achieved with the one-step obturator is less effective than separate Resilon root fillings followed by a 24-h delay prior to the fibre post-placement. Incomplete setting of the sealer and restricted relief of polymerisation shrinkage stresses may be responsible for the inferior seal of the one-step root-filling/post-restoration technique.

Original languageEnglish (US)
Pages (from-to)547-552
Number of pages6
JournalJournal of Dentistry
Issue number7
StatePublished - Jul 2010


  • Fibre posts
  • Filling/post-obturator
  • Flodec
  • Fluid filtration
  • Resilon

ASJC Scopus subject areas

  • Dentistry(all)


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