Can Fiber Posts Increase Root Stresses and Reduce Fracture?

Autor(es)

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]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF DENTAL RESEARCH; v. 89, n. 6, p. 587-591, JUN 2010.
• Citações Web of Science: 72

Resumo

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)

• Processo FAPESP: 07/00191-0 - Efeito torque em pinos intra-radiculares com achatamento mésio-distal
• Beneficiário: Carina Baptiston Tanaka
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 05/53069-1 - Sobre a biomecânica de pinos intra-radiculares
• Beneficiário: Josete Barbosa Cruz Meira
• Modalidade de apoio: Auxílio à Pesquisa - Regular