Can fiber posts increase root stresses and reduce fracture?

A. F.V. Santos, J. B.C. Meira, C. B. Tanaka, T. A. Xavier, R. Y. Ballester, R. G. Lima, C. S. Pfeifer, A. Versluis

Research output: Contribution to journalArticlepeer-review

114 Scopus citations


The clinical success of fiber posts has been attributed to their lower elastic modulus. The tested hypothesis was that fiber posts could lead to lower risk of post debonding and lower risk of root fracture, despite an increase in root stresses. Stress analyses were carried out with a 3D finite element model of a premolar restored with a metallic or a fiber post. Bonded and non-bonded post/cement interface conditions were simulated. We calculated risk-of-fracture indices by determining the highest principal stress values divided by the tensile strength. Shear stresses along the post/cement interface were analyzed for the bonded models. Compared with the premolar restored with a metallic post, the fiber post generated lower stresses along the interface and higher stresses in the root. However, with the fiber post, fracture was less likely to occur in the root, since its core and post fracture indices were higher.

Original languageEnglish (US)
Pages (from-to)587-591
Number of pages5
JournalJournal of dental research
Issue number6
StatePublished - Jun 2010
Externally publishedYes


  • Biomechanics
  • Endodontically treated teeth
  • Finite element analysis
  • Intra-radicular posts
  • Root fracture

ASJC Scopus subject areas

  • Dentistry(all)


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