%0 Journal Article
%T Evaluaci車n no lineal de dos postes diferentes Nonlinear evaluation of two different posts
%A Patricia Lopera Builes
%A Federico Latorre Correa
%A Junes Abdul Villarraga Ossa
%J Revista Facultad de Odontolog赤a Universidad de Antioquia
%D 2012
%I Universidad de Antioquia
%X INTRODUCCI車N: los dientes tratados endod車ncicamente que van a ser rehabilitados con coronas y que han perdido parte de su estructura dental, necesitan de un poste prefabricado o colado para que ayude a la retenci車n de la restauraci車n final y as赤 el diente pueda recuperar la funcionalidad y la est谷tica. La literatura reporta cu芍ndo utilizar un poste colado o prefabricado, pero no es contundente cu芍l distribuye mejor los esfuerzos, cu芍l material o forma de poste es mejor y si el m車dulo de elasticidad tiene o no relaci車n con la distribuci車n de las cargas a lo largo del eje axial del diente. M谷TODOS: se hicieron dos modelos en SolidWorks de un incisivo central superior con todas sus estructuras de soporte, uno con un poste colado y otro con un poste prefabricado, adem芍s de una corona completamente cer芍mica. Mediante un an芍lisis de elementos finitos se cargaron dichos dientes a 200, 400, 600 y 800 N para llevarlos hasta la plasticidad. RESULTADOS: a 200 y 400 N ambos postes mostraron diferente distribuci車n de esfuerzos sin afectar la restauraci車n o la ra赤z dental. CONCLUSIONES: a cargas masticatorias normales, ambos postes son predecibles para rehabilitar un diente que necesita de la incorporaci車n de un poste. Introduction: endodontically treated teeth that will be restored with crowns and which have lost part of their dental structure need a cast post or a prefabricated post to improve final restoration retention and therefore to be able to regain their functionality and aesthetics. The literature suggests when to use a cast or prefabricated post, but it is not conclusive in terms of which one has a better stress distribution, which post material or shape is better, or whether their modulus of elasticity is related to load distribution along the tooth's axis. Methods: by using Solid Works, two models of a maxillary central incisor with all its supporting structures were made, one with a cast post and another one with a prefabricated post plus an all-ceramic crown. By means of finite element analysis both teeth were subjected to loads of 200, 400, 600 and 800 N up to reaching their plasticity. Results: at 200 and 400 N, both posts showed different stress distribution patterns without altering the restoration or the tooth's root. Conclusions: at normal masticatory loads, both posts are likely to restore a tooth that needs addition of a post.
%K poste colado
%K poste prefabricado
%K distribuci車n de los esfuerzos
%K m車todo de elementos finitos
%K cast post
%K prefabricated post
%K stress distribution
%K finite elements method
%U http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0121-246X2012000100005