Stress Analysis of Endodontically Treated Anterior Teeth Restored with Different Types of Post Material

Management of Complicatd Crown Root Fracture - A Case Report

“…[5][6][7] It has been suggested that the use of a long, thin fiber post is effective for reducing tensile stress that can lead to tooth root fractures of the anterior teeth with endodontic treatments. 8 In the present case, the fracture line was extending subgingivally and the tooth was pulpless. Hence, it was decided to gain intraradicular retention by using fiber posts.…”

Biomechanical Models of Endodontic Restorations

“…Even dentine presents reported values of compressive strength that are significantly greater than its tensile strength (Craig & Powers, 2002). Some authors suggest the use of the Rankine or Maximum Normal Stress criterion to evaluate the failure in dentine, using the maximum principal stress to analyse the results (Ichim et al, 2006;Maceri et al, 2009;Nakamura et al, 2006). Others analyse the results of shear stress at the post-dentine interface, and indicate that this value should be compared to the reported shear bond strengths in order to evaluate the risk of loosing retention Maceri et al, 2009;Pegoretti et al, 2002).…”

“…Although this simplification could be an interesting way to reduce computational time, the simulation of the total tooth is more realistic, as the tooth is not geometrically symmetric. A considerable number of works in the literature make no explicit reference to the constraints in the paper Holmes et al, 1996;Nakamura et al, 2006). The second type of boundary conditions correspond to forces applied to the system.…”

“…Not all models in the literature include the bone. When included, sometimes it is modelled with uniform properties (Imanishi et al, 2003;Nakamura et al, 2006), although most of the models consider the cancellous bone and a layer of cortical bone near the bone surface Gonzalez-Lluch et al, 2009b). Thin structures, such as the PDL and cement are not always considered in the FE models.…”

Avaliação dos ensaios de microtração, push-out e pull-out: resistência de união entre pino de fibra e dentina radicular, análise de elementos finitos e microscopia confocal

“…Em um estudo utilizando a análise de elementos finitos em duas dimensões foi comprovado que pinos de fibra produzem menor concentração de tensões na dentina radicular circundante à ponta do pino do que os pinos metálicos (118) . Outros estudos tiveram os mesmos resultados (119,120) .…”