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The Influence of Post System Design and Material on the Biomechanical Behavior of Teeth with Little Remaining Coronal Structure
Author(s) -
Pinto Cristiano Lazzari,
Bhering Claudia Lopes Brilhante,
Oliveira Gabriel Rodrigues,
Maroli Angélica,
Reginato Vagner Flávio,
Caldas Ricardo Armini,
Bacchi Atais
Publication year - 2019
Publication title -
journal of prosthodontics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.902
H-Index - 60
eISSN - 1532-849X
pISSN - 1059-941X
DOI - 10.1111/jopr.12804
Subject(s) - materials science , coronal plane , von mises yield criterion , dentin , glass fiber , composite material , post and core , core (optical fiber) , fracture (geology) , dentistry , root canal , stress (linguistics) , orthodontics , finite element method , structural engineering , medicine , anatomy , linguistics , philosophy , crown (dentistry) , engineering
Purpose To evaluate the influence of different post systems on the biomechanical behavior of teeth with a severe loss of remaining coronal structure. Materials and Methods Fifty standardized bovine teeth (n = 10 per group) were restored with: cast post‐and‐core (CPC), prefabricated metallic post (PFM), parallel glass‐fiber post (P‐FP), conical glass‐fiber post (C‐FP), or composite core (no post, CC). The survival rate during thermomechanical challenging (TC), the fracture strength (FS), and failure patterns (FP) were evaluated. Finite element models evaluated the stress distribution after the application of 100 N. Results All specimens survived TC. Similar FS was observed among post‐containing groups. Groups P‐FP and CC presented 100% repairable fractures. The von Mises analysis showed the maximum stresses into the root canal in groups restored with metallic posts. Glass‐fiber posts and CC presented the maximum stresses at the load contact point. Glass‐fiber groups showed lower stresses in the analysis of maximal contact pressure; CPC led to the highest values of contact pressure. The modified von 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 biomechanical behavior of teeth with little remaining coronal structure.