“…In these three-dimensional models, tetrahedral or hexahedral finite elements are used. The mesh is created normally using the mesher of a commercial finite element package software, such as Ansys (Garbin et al, 2010;Hsu et al, 2009;Mezzomo et al, 2011), MSC-Nastran (Gonzalez-Lluch et al, 2009bMaceri et al, 2009;Rodríguez-Cervantes et al, 2007), MSC-Marc Pegoretti et al, 2002) or Cosmos (Ichim et al, 2006). In those cases, a tetrahedral mesh is the typical option because of the complicated geometries of the tooth.…”