Stress generation in mandibular anterior teeth restored with different types of post-and-core at various levels of ferrule

Pertinent evidence regarding the mechanical integrity of mandibular anterior teeth restored with a post-and-core is limited. The purpose of this finite element analysis study was to compare the impact of the post type (glass fiber post-and-resin core or cast post-and-core) along with the ferrule eff...

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Veröffentlicht in:The Journal of prosthetic dentistry 2018-06, Vol.119 (6), p.965-974
Hauptverfasser: Savychuk, Anatolii, Manda, Marianthi, Galanis, Christos, Provatidis, Christofer, Koidis, Petros
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container_end_page 974
container_issue 6
container_start_page 965
container_title The Journal of prosthetic dentistry
container_volume 119
creator Savychuk, Anatolii
Manda, Marianthi
Galanis, Christos
Provatidis, Christofer
Koidis, Petros
description Pertinent evidence regarding the mechanical integrity of mandibular anterior teeth restored with a post-and-core is limited. The purpose of this finite element analysis study was to compare the impact of the post type (glass fiber post-and-resin core or cast post-and-core) along with the ferrule effect on the stress fields generated in endodontically treated mandibular lateral incisors and canines. Three-dimensional models of the segmented mandible were developed. Mandibular incisors and canines with or without a 2-mm circular ferrule and restored with a cast post-and-core or glass fiber post-and-resin core were simulated and subjected to linear elastic static analysis. The principal stress values were calculated. von Mises equivalent stresses were used to evaluate the stress. Maximum principal stresses in dentin were highest in incisors, with a ferrule. Stress parameters in composite resin core in both incisors and canines were critically close to the tensile failure limit of the core material. Cast post-and-cores cemented in incisors without a ferrule accumulated the highest stresses, exceeding the tensile failure limit of resin-modified glass ionomer cement. Tooth preparation with a ferrule led to a remarkable rise in stress in the dentin of mandibular incisors but favored the mechanical integrity of the restoration.
doi_str_mv 10.1016/j.prosdent.2017.07.021
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source MEDLINE; ScienceDirect Freedom Collection (Elsevier)
subjects Cuspid
Dental Models
Dentin
Dentistry
Finite Element Analysis
Humans
Incisor
Mandible
Models, Structural
Post and Core Technique
Stress, Mechanical
title Stress generation in mandibular anterior teeth restored with different types of post-and-core at various levels of ferrule
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