Influência da espessura dentinária e geometria de pinos radiculares na distribuição de tensões em incisivos centrais superiores

Abstract

The aim of this study was to evaluate the dentin stress distribution in the endodontically treated maxillary upper central incisor restored with different post types. Six different post Systems were studied: carbon fiber, glass fiber, cast post in a weakened tooth, cast post in a weakened and restored tooth, stainless Steel, titanium and zirconia. The study was carried out by the fínite element stress analysis regarding a 45° for the Joad application. Regarding this study, the following conclusions were drawn: post placement result in a distribution of the stress that is not uniform along the root canal; the greatest compressive and tensile stress in dentin were predicted to occur at the lingual (compression) or buccal (tension) root surface; the use of a composite resin in the weakened tooth resulted in better uniform distribution of stress along the root canal.