Post Dimension Effect: Stress Distribution Pattern in Teeth Restored with Glass Fiber Prefabricated Posts

P.J. Rodríguez-Cervantes, J.L. Sancho-Bru, A. Barjau-Escribano, A. Pérez-González, and L. Forner-Navarro (Spain)


Finite element method, dental biomechanics, stress distribution, prefabricated glass fiber post.


This work used the finite element method (FEM) to predict stress distribution patterns in dentine and core of an endodontically treated tooth, restored with glass fiber posts of different diameters and lengths. For this investigation, a previously validated model of a maxillary central incisor was used. A load of 300 N at an angle of 30º to the root longitudinal axis was applied on the palatal side of each model in the vestibular direction. On the basis of the simulations results, the glass fiber post induced a stress field quite similar to that of the natural tooth, with maximal stresses that did not vary with post or diameter length. No stress concentration was predicted along the post juncture with core and dentine.

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