The influence of post system design and material on the biomechanical behavior of teeth with little remaining coronal structure
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Universidade Federal de Minas Gerais
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Artigo de periódico
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Purpose:To evaluate the influence of different post systems on the biomechanicalbehavior of teeth with a severe loss of remaining coronal structure.Materials and Methods:Fifty standardized bovine teeth (n=10 per group) wererestored with: cast post-and-core (CPC), prefabricated metallic post (PFM), paral-lel glass-fiber post (P-FP), conical glass-fiber post (C-FP), or composite core (nopost, CC). The survival rate during thermomechanical challenging (TC), the frac-ture strength (FS), and failure patterns (FP) were evaluated. Finite element modelsevaluated the stress distribution after the application of 100 N.Results:All specimens survived TC. Similar FS was observed among post-containinggroups. Groups P-FP and CC presented 100% repairable fractures. The von Misesanalysis showed the maximum stresses into the root canal in groups restored withmetallic posts. Glass-fiber posts and CC presented the maximum stresses at the loadcontact point. Glass-fiber groups showed lower stresses in the analysis of maximalcontact pressure; CPC led to the highest values of contact pressure. The modifiedvon Mises (mvM) stress in dentin did not show differences among groups. Moreover,mvM values did not reach the dentin fracture limit for any group.Conclusions:The type of intracanal post had a relevant influence on the biomechan-ical behavior of teeth with little remaining coronal structure
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Finite Element Analysis, Tooth fractures, Tooth nonvital, Post and core technique
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Finite element analysis, Post-and-core technique, tooth nonvital, tooth fracture
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https://onlinelibrary.wiley.com/doi/10.1111/jopr.12804