TY - JOUR
T1 - Biomechanical behavior of indirect composite materials: a 3D-FEA study
AU - Tribst, João Paulo Mendes
AU - Dal Piva, Amanda Maria de Oliveira
AU - Borges, Alexandre Luiz Souto
N1 - Publisher Copyright:
© 2017, Faculdade de Ciencias Farmaceuticas (Biblioteca). All rights reserved.
PY - 2017/7/1
Y1 - 2017/7/1
N2 - Objetivo: This study aimed to evaluate the influence of the elastic modulus of indirect composite resins (ICR) in the stress distribution of a restored maxillary first premolar. Material and methods: A three-dimensional (3D) finite element model of the tooth and the mesialocclusal- distal (MOD) restoration was created. Three ICR were simulated, by changing the elastic modulus: 10, 15 and 20 GPa. All materials were considered as isotropic, homogeneous and linearly elastic. An occlusal load (200 N) was applied on occlusal surface trough a sphere, and the nodes of the external surface of the root were fixed. The maximum principal stresses on the tooth and restoration were analyzed. Results: According to FE analysis, the lower the ICR elastic modulus, the higher the tensile stress values generated on the remaining tooth. For the restoration, the opposite was observed: the lower the modulus, the lower the tensile stress. Conclusion: With the limitations of this study it is possible to conclude that the greater the elastic modulus of the restorative material the harder it will be to deflect the cusps, but the easier the fracture of the resin.
AB - Objetivo: This study aimed to evaluate the influence of the elastic modulus of indirect composite resins (ICR) in the stress distribution of a restored maxillary first premolar. Material and methods: A three-dimensional (3D) finite element model of the tooth and the mesialocclusal- distal (MOD) restoration was created. Three ICR were simulated, by changing the elastic modulus: 10, 15 and 20 GPa. All materials were considered as isotropic, homogeneous and linearly elastic. An occlusal load (200 N) was applied on occlusal surface trough a sphere, and the nodes of the external surface of the root were fixed. The maximum principal stresses on the tooth and restoration were analyzed. Results: According to FE analysis, the lower the ICR elastic modulus, the higher the tensile stress values generated on the remaining tooth. For the restoration, the opposite was observed: the lower the modulus, the lower the tensile stress. Conclusion: With the limitations of this study it is possible to conclude that the greater the elastic modulus of the restorative material the harder it will be to deflect the cusps, but the easier the fracture of the resin.
KW - Composite resin
KW - Finite elements analysis
KW - Indirect restoration
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U2 - 10.14295/bds.2017.v20i3.1444
DO - 10.14295/bds.2017.v20i3.1444
M3 - Article
AN - SCOPUS:85032670650
SN - 2178-6011
VL - 20
SP - 52
EP - 57
JO - Brazilian Dental Science
JF - Brazilian Dental Science
IS - 3
ER -