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Stress distribution in a premolar 3D model with anisotropic and isotropic enamel

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Abstract

The aim of this study was to compare the areas of stress concentration in a three-dimensional (3D) premolar tooth model with anisotropic or isotropic enamel using the finite element method. A computed tomography was imported to an image processing program to create the tooth model which was exported to a 3D modeling program. The mechanical properties and loading conditions were prescribed in Abaqus. In order to evaluate stresses, axial and oblique loads were applied simulating realistic conditions. Compression stress was observed on the side of load application, and tensile stress was observed on the opposite side. Tensile stress was concentrated mainly in the cervical region and in the alveolar insertion bone. Although stress concentration analyses of the isotropic 3D models produced similar stress distribution results when compared to the anisotropic models, tensile stress values shown by anisotropic models were smaller than the isotropic models. Oblique loads resulted in higher values of tensile stresses, which concentrate mainly in the cervical area of the tooth and in the alveolar bone insertion. Anisotropic properties must be utilized in enamel stress evaluation in non-carious cervical lesions.

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Acknowledgments

The student received scholarship from the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq#132229/2011-0). We thank the Pró-reitoria de Pesquisa da UFMG for the English review.

Conflict of interest

The authors declare that there is no conflict of interest.

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Authors and Affiliations

  1. Department of Restorative Dentistry, Faculty of Dentistry, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, CEP 31270-901, Belo Horizonte, MG, Brazil

    Laís S. Munari, Tulimar P. M. Cornacchia, Allyson N. Moreira & Cláudia S. Magalhães

  2. Department of Mechanical Engineering, School of Engineering, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, CEP 31270-901, Belo Horizonte, MG, Brazil

    Jason B. Gonçalves

  3. Department of Structural Engineering, School of Engineering, CEP 31270-901, Belo Horizonte, MG, Brazil

    Estevam B. De Las Casas

  4. Rua Ludgero Dolabela, 139 # 301 - Bairro Gutierrez - 30-430130, Belo Horizonte, MG, Brazil

    Cláudia S. Magalhães

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  1. Laís S. Munari
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  2. Tulimar P. M. Cornacchia
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  3. Allyson N. Moreira
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  4. Jason B. Gonçalves
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  5. Estevam B. De Las Casas
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  6. Cláudia S. Magalhães
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Correspondence to Laís S. Munari.

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Munari, L.S., Cornacchia, T.P.M., Moreira, A.N. et al. Stress distribution in a premolar 3D model with anisotropic and isotropic enamel. Med Biol Eng Comput 53, 751–758 (2015). https://doi.org/10.1007/s11517-015-1289-4

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  • DOI: https://doi.org/10.1007/s11517-015-1289-4

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