Effect of glass-fiber post on the biomechanical behavior of teeth with direct veneers
DOI:
https://doi.org/10.14295/bds.2020.v23i3.1969Abstract
Objective: This study aimed to evaluate the biomechanical behaviour of endodontically treated teeth with direct veneer that received or not intra-radicular glass fiber post by finite elements analysis. Material and methods: Six models were designed, varying the presence or absence of glass fiber post and the thickness of direct veneer (0.5, 0.7 and 1 mm). Tridimensional models of maxillary central incisors were obtained with CAD software, Rhinoceros 4.0, and transferred to CAE software, ANSYS 17.2, which a 100N load was applied in a 45° on the lingual surface to simulate functional movements. Geometry contacts were bonded, and the structures were isotropic, linear, elastics, and homogeneous. After coherence and convergence analysis of mashes, the chosen fail criterion was the maximum principal stresses. Results: For cement, glass fiber post, the stress distribution was similar independently of glass fiber post presence or veneer thickness. Models with glass fiber post had better stress distribution and lower values of maximum stress for inner dentin and veneers. Veneers with 0.5 and 1 mm had higher stress concentration areas. Conclusions: It can be concluded that glass fiber post is favorable for restored teeth with direct veneers, and very thin or very thick preparations can damage the biomechanical behavior of restorations.
Keywords
Dental veneers; Finite element analysis; Nonvital tooth; Post and core technique.
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Author Biography
Taciana Marco Ferraz Caneppele, São Paulo State University (UNESP) - Institute Science and Technology (ICT), São José dos Campos - Departament of Restorative Dentistry - São José dos Campos - SP - Brazil.
Associate Professor at ICT – Unesp
Expertise in Restorative Dentistry
Head of Academic Group of Clinical Research (GAPEC) at ICT-UNESP
Member of Local Institution Review Board (IRB)
Member of Brazilian Group of Professors in Dentistry (GBPD)
Member of IADR (International Association of Dental Research)
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