Three-dimensional finite element modeling from CT images of tooth and its validation

ResumoIntrodução: O desenvolvimento e validação de modelos matemáticos é uma importante etapa da metodologia de estudos de elementos finitos. Objetivo: Este estudo tem o objetivo descrever o desenvolvimento e validação de um modelo numérico tridimensional de um pré-molar superior para análise em elementos finitos. Material e método: Fotografias padronizadas de cortes sequenciais de um pré-molar hígido serviram de referência para o desenvolvimento do modelo 3D, que foi construído por meio do programa SolidWorks (Dassault, França). A fim de validar o modelo testes de compressão e simulação numérica foram realizados. Os gráficos de carga versus deslocamento de ambos os ensaios foram comparados visualmente, a percentagem de erro calculada e homogeneidade dos coeficientes de regressão testada. Resultado: Um modelo 3D preciso foi desenvolvido e validado, uma vez que os gráficos apresentavam-se visualmente semelhantes, o percentual de erro ficou dentro dos limites aceitáveis e as retas foram consideradas paralelas. Conclusão: Os procedimentos de modelagem e validação descritos permitem o desenvolvimento de modelos dentários 3D precisos com comportamento biomecânico semelhante aos dentes naturais. Os métodos podem ser aplicados no desenvolvimento e validação de novos modelos e estudos de simulações computacionais por meio do MEF.Descritores: Simulação por computador; estudos de validação; análise de elementos finitos. AbstractIntroduction: The development and validation of mathematical models is an important step of the methodology of finite element studies. Objective: This study aims to describe the development and validation of a three-dimensional numerical model of a maxillary premolar for finite element analysis. Material and method: The 3D model was based on standardized photographs of sequential slices of an intact premolar and generated with the use of SolidWorks Software (Dassault, France). In order to validate the model, compression and numerical tests were performed. The load versus displacement graphs of both tests were visually compared, the percentage of error calculated and homogeneity of regression coefficients tested. Result: An accurate 3D model was developed and validated since the graphs were visually similar, the percentage error was within acceptable limits, and the straight lines were considered parallel. Conclusion: The modeling procedures and validation described allows the development of accurate 3D dental models with biomechanical behavior similar to natural teeth. The methods may be applied in development and validation of new models and computer-aided simulations using FEM.

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“…Furthermore, validation can also be performed by the comparison of strain-gauge studies 14 and cusp deflection in computer simulation 19,20 .…”

Section: Introductionmentioning

confidence: 99%

Modeling and validation of a 3D premolar for finite element analysis

Durand

Guimarães

Monteiro

2016

Rev. odontol. UNESP

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“…[1][2][3][4][5] The FEM enables the modeling of very complex structures (e.g. teeth) and gives an accurate description of the local strain and stress inside the non-homogenous material.…”

mentioning

confidence: 99%

“…teeth) and gives an accurate description of the local strain and stress inside the non-homogenous material. [3][4][5][6] Depending on the research topic, finite element (FE) models in macro-, meso-and microscales can be used. 3,[7][8][9] However, FE models of the biological structure are usually performed using a simplified approach.…”

mentioning

confidence: 99%

The mechanical properties of human dentin for 3-D finite element modeling – numerical and analytical evaluation

Grzebieluch¹,

Będziński²,

Czapliński³

et al. 2017

Adv Clin Exp Med

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“…The FEA reliability depends on using an appropriate software to solve the mathematical problem, the structures geometry, material properties, quality of finite element mesh, boundary and loading conditions (4,24). Over the years, there was a wide range of commercial brands and mechanical properties for the same dental material in order to provide longevity, stability and better clinical performance.…”

Section: Discussionmentioning

confidence: 99%

“…The virtual model containing several structures with specific mechanical properties is divided into small fragments to generate the finite element mesh (4). As result, the performance of materials, techniques, displacement and stress distribution under load are numerically simulated in the model (5).…”

Section: Introductionmentioning

confidence: 99%

Reliability of FEA on the Results of Mechanical Properties of Materials

et al. 2015

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The present study evaluated the reliability of FEA on the results of different mechanical properties (E and v) of materials. Two 3D models of a maxillary canine with endodontic treatment, intracanal post, composite resin core and restored with porcelain-fused-tometal crown were generated according to micro-CT images. Two groups with different E and ν values for porcelain, metal coping alloy, resin cement and composite resin were established. The materials' properties for group GL were based on literature data, while for group GIE the impulse excitation technique was used. A load of 180 N was applied at 45° on the incisal third of the lingual surface of the canine tooth. All models were supported by the periodontal ligament (x=y=z=0). The von Mises stress (VMS) was calculated. The stress values revealed differences between the groups for both VMS distribution and value. The porcelain (GL: 5.966 MPa; GIE: 7.478 MPa), metal coping (GL: 3.811 MPa; GIE: 0.973 MPa) and core (GL: 4.771 MPa; GIE: 0.026 MPa) were significantly affected. In conclusion, this study showed that the determination of mechanical properties (E and ν) of materials is essential for the reliability on the results of FEA.

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Three-dimensional finite element modeling from CT images of tooth and its validation

Cited by 53 publications

References 20 publications

Modeling and validation of a 3D premolar for finite element analysis

Modeling and validation of a 3D premolar for finite element analysis

The mechanical properties of human dentin for 3-D finite element modeling – numerical and analytical evaluation

Reliability of FEA on the Results of Mechanical Properties of Materials

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