RESUMEN
The aim of this study was to develop a three-dimensional (3D) finite element (FE) model of a sound extracted human second premolar from micro-CT data using commercially available software tools. A detailed 3D FE model of the tooth could be constructed and was experimentally validated by comparing strains calculated in the FE model with strain gauge measurement of the tooth under loading. The regression coefficient and its standard error in the regression analysis between strains calculated by the FE model and measured with strain gauge measurement were 0.82 and 0.06, respectively, and the correlation coefficient was found to be highly significant. These results suggested that an FE model reconstructed from micro-CT data could be used as a valid model to estimate the actual strains with acceptable accuracy.
Asunto(s)
Diente Premolar/anatomía & histología , Análisis de Elementos Finitos , Imagenología Tridimensional/métodos , Microtomografía por Rayos X/métodos , Diente Premolar/diagnóstico por imagen , Simulación por Computador , Diseño Asistido por Computadora , Esmalte Dental/anatomía & histología , Pulpa Dental/anatomía & histología , Análisis del Estrés Dental , Dentina/anatomía & histología , Módulo de Elasticidad , Análisis de Elementos Finitos/estadística & datos numéricos , Humanos , Procesamiento de Imagen Asistido por Computador/métodos , Modelos Biológicos , Programas Informáticos , Estrés Mecánico , Cuello del Diente/anatomía & histología , Corona del Diente/anatomía & histología , Raíz del Diente/anatomía & histologíaRESUMEN
Wedge-shaped defects are frequently observed on the cervical region of the human tooth. Previously, most studies explained that improper tooth-brushing causes such defects. However, recent clinical observation suggested that the repeated stress due to occlusal force may induce the formation of these wedge-shaped defects. In this study, therefore, two-dimensional human tooth models are considered with and without a wedge-shaped defect by applying the finite element method. To evaluate large stress concentrations accurately, a method of analysis is discussed in terms of the intensity of singular stress fields appearing at the tip of the sharp wedge-shaped defect. The effects of the position and direction of occlusion on the intensity of singular stress fields are discussed before and after restoration with composite resins.