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CRACK PROPAGATION IN POST-CORE REHABILTATION OF A MAXILLARY CENTRAL INCISOR AFTER ROOT RECONSTRUCTION

Casas, E. B. de Las; Manzoli, O. L.; Mattos, C. M. A.;

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Prosthetic rehabilitation of endodontically treated teeth usually requires the use of an endodontic post and coronal core to enhance artificial crown retention. In cases of flared canals, the weakened remaining dentin walls have to be reconstructed prior to post insertion in order to increase post retention and root strength. The use of adhesive composite resin restorative materials is usually recommended. Based on the mechanical resistive properties of dentin and restorative materials found in the literature, this study describes a numerical predictive analysis of crack propagation which may lead to fracture after root reconstruction. A 3D finite element model of a maxillary central incisor restored with a glass fiber post/composite core/crown system was constructed. The root canal walls were thinned to simulate a root defect filled by adhesive composite resin. A 100N oblique load was applied to the crown lingual surface, simulating normal mastication. The possibility of crack formation followed by dentin root wall fracture or disruption of the cement layer was investigated. A scalar damage model based on the maximum principal stress criterion was used to predict crack propagation. The parameters of the constitutive model were the elastic properties, the tensile strength and the fracture energy of the material.

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Palavras-chave: Failure analysis, Crack propagation, Interfaces, Dental biomechanics, Endodon-tic Posts.,

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DOI: 10.5151/meceng-wccm2012-19072

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Como citar:

Casas, E. B. de Las; Manzoli, O. L.; Mattos, C. M. A.; "CRACK PROPAGATION IN POST-CORE REHABILTATION OF A MAXILLARY CENTRAL INCISOR AFTER ROOT RECONSTRUCTION", p. 2919-2929 . In: In Proceedings of the 10th World Congress on Computational Mechanics [= Blucher Mechanical Engineering Proceedings, v. 1, n. 1]. São Paulo: Blucher, 2014.
ISSN 2358-0828, DOI 10.5151/meceng-wccm2012-19072

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