Teeth restored using fiber-reinforced posts: In vitro fracture tests and finite element analysis

Biomechanical Models of Endodontic Restorations

“…Some attempts have been made in recent years to automate the process of creating high-quality meshes using hexahedral elements from anatomical CT data (Clement et al, 2004). The use of convergence tests is the most commonly reported method for deciding mesh density in the majority of previous works (Ferrari et al, 2008;Maceri et al, 2009;Schmitter et al, 2010). Some authors report special attention to the convergence of results near the more stressed area, such as the post-cement interface and the cemento-enamel junction (Garbin et al, 2010;Zarone et al, 2006).…”

“…4 shows a sagittal section of a mesh using tetrahedral elements for a restored incisor, generated by the authors using the Pro/Engineer FEM mesher. Some works, however, have used hexahedral elements (Ferrari et al, 2008;Okamoto et al, 2008;Schmitter et al, 2010;Zarone et al, 2006), which provide models with good results using fewer degrees of freedom, but at the cost of a more difficult mesh generation. In some models, elements with quadratic interpolation, i.e.…”

“…Three-dimensional models have been used extensively for simulating endodontic treatment since the beginning of the century Ausiello et al, 2002;BarjauEscribano et al, 2006;Boschian Pest et al, 2006;Genovese et al, 2005;Lanza et al, 2005). In recent years some of the most complete three-dimensional models ever developed for studying the biomechanics of endodontic restorations have been reported (Ferrari et al, 2008;Garbin et al, 2010;Gonzalez-Lluch et al, 2009b;Maceri et al, 2009;Mezzomo et al, 2011;Okamoto et al, 2008;Schmitter et al, 2010). In these three-dimensional models, tetrahedral or hexahedral finite elements are used.…”

“…However, some works did not include the ligament (Yaman et al, 1998;Zarone et al, 2006), despite it has been reported that stress distribution is affected to an important degree by this omission (Davy et al, 1981) or even by a geometrically simplified representation (Toms & Eberhardt, 2003). When cement layers are considered in the biomechanical model, they are usually represented with a constant small thickness Maceri et al, 2009;Okamoto et al, 2008;Schmitter et al, 2010). However, some works simplify the model by obviating the cement in the interface between the core and the crown (Gonzalez-Lluch et al, 2009b;Lanza et al, 2005) or even in the interface between the post and the root (Adanir & Belli, 2007;Hsu et al, 2009).…”

“…In some models, elements with quadratic interpolation, i.e. 20-node hexahedral or 10-node tetrahedral, are used to improve the results (Maceri et al, 2009;Schmitter et al, 2010). Some attempts have been made in recent years to automate the process of creating high-quality meshes using hexahedral elements from anatomical CT data (Clement et al, 2004).…”