Biomechanical behavior of indirect composite materials: a 3D-FEA study

Authors

  • João Paulo Mendes Tribst São Paulo State University (Unesp) – Institute of Science and Technology – São José dos Campos – Department of Dental Materials and Prosthodontics – SP – Brazil. http://orcid.org/0000-0002-5412-3546
  • Amanda Maria de Oliveira Dal Piva São Paulo State University (Unesp) – Institute of Science and Technology – São José dos Campos – Department of Dental Materials and Prosthodontics – SP – Brazil. http://orcid.org/0000-0002-3844-2053
  • Alexandre Luis Souto Borges São Paulo State University (Unesp) – Institute of Science and Technology – São José dos Campos – Department of Dental Materials and Prosthodontics – SP – Brazil. http://orcid.org/0000-0002-5707-7565

DOI:

https://doi.org/10.14295/bds.2017.v20i3.1444

Abstract

Objective: 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 mesial-occlusal-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 stress values generated on the remaining tooth. For the restoration, the opposite was observed: the lower the modulus, the lower the 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.

Keywords: Finite Elements Analysis; Composite Resin; Indirect Restoration; Flexural Strength.

Author Biographies

João Paulo Mendes Tribst, São Paulo State University (Unesp) – Institute of Science and Technology – São José dos Campos – Department of Dental Materials and Prosthodontics – SP – Brazil.

Doutorando em Odontologia Restauradora do Departamento de Materiais Dentários e Prótese do Instituto de Ciência e Tecnologia, Universidade Estadual Paulista (UNESP), São José dos Campos; 12245-000; São Paulo - Brasil. joao.tribst@ict.unesp.br

Amanda Maria de Oliveira Dal Piva, São Paulo State University (Unesp) – Institute of Science and Technology – São José dos Campos – Department of Dental Materials and Prosthodontics – SP – Brazil.

Doutorando em Odontologia Restauradora do Departamento de Materiais Dentários e Prótese do Instituto de Ciência e Tecnologia, Universidade Estadual Paulista (UNESP), São José dos Campos; 12245-000; São Paulo - Brasil. joao.tribst@ict.unesp.br

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Published

2017-09-12

Issue

Vol. 20 No. 3 (2017): Jul. - Sep. / 2017 - Published September 2017

Section

Clinical or Laboratorial Research