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A finite element analysis on the stress induced by different post materials into dental tissues

A. M. VIŢALARIU1,* , R. I. COMĂNECI2, C. G. DUMITRAŞ2

Affiliation

  1. University of Medicine and Pharmacy “Grigore T. Popa” of Iasi, Romania
  2. ”Gh. Asachi” Technical University of Iasi, Romania

Abstract

The purpose of this Finite Element Analysis was to evaluate the influence of post material on the stress distribution into the post and dental tissues. Two 3D models were created: one intact incisor and one reconstructed with different posts (titan, ceramic, carbon fibre and glass fibre posts). The simulated compressive load (30daN) was applied to an angle of 45 degrees on the palatal surface of the crown. The Algor software computed the stresses for each model, comparing the maximum registered intensity, localization and concentration into the post and the dental-periodontal complex. The rigid titan and ceramic posts produce the greatest stress concentration in the middle third of the root, at the post/dentin interface, which predispose to vertical irreparable root fractures. The von Mises stresses recorded in the root reconstructed with fibre posts are closer to that recorded in the root without post and are more favourable for the durability of the tooth, because they have a Young’s modulus similar to the dentin and, as a result, a similar behaviour under the compressive load. This means that fibre reinforced posts are the best choice to reconstruct an endodontically treated tooth..

Keywords

Finite element analysis, Fibre reinforced post, Ceramic post.

Submitted at: March 23, 2007
Accepted at: Nov. 16, 2007

Citation

A. M. VIŢALARIU, R. I. COMĂNECI, C. G. DUMITRAŞ, A finite element analysis on the stress induced by different post materials into dental tissues, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 11, pp. 3419-3422 (2007)