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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Can Fiber Posts Increase Root Stresses and Reduce Fracture?

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Author(s):
Santos, A. F. V. [1] ; Meira, J. B. C. [1] ; Tanaka, C. B. [1] ; Xavier, T. A. [1] ; Ballester, R. Y. [1] ; Lima, R. G. [2] ; Pfeifer, C. S. [3] ; Versluis, A. [4]
Total Authors: 8
Affiliation:
[1] Univ Sao Paulo, Sch Dent, Dept Dent Mat, BR-05508000 Sao Paulo - Brazil
[2] Univ Sao Paulo, Dept Mech Engn, BR-05508 Sao Paulo - Brazil
[3] Univ Colorado, Sch Dent, Dept Craniofacial Biol, Aurora, CO - USA
[4] Univ Minnesota, Sch Dent, Dept Restorat Sci, Minneapolis, MN 55455 - USA
Total Affiliations: 4
Document type: Journal article
Source: JOURNAL OF DENTAL RESEARCH; v. 89, n. 6, p. 587-591, JUN 2010.
Web of Science Citations: 72
Abstract

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. (AU)