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The Effect of Resection Angle on Stress Distribution after Root-End Surgery

INTRODUCTION: This study aimed to investigate the influence of the resection angle on the stress distribution of retrograde endodontic treated maxillary incisors under oblique-load application. METHODS AND MATERIALS: A maxillary central incisor which was endodontically treated and restored with a fi...

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Autores principales: Monteiro, Jaiane Bandoli, Dal Piva, Amanda Maria de Oliveira, Tribst, João Paulo Mendes, Borges, Alexandre Luiz Souto, Tango, Rubens Nisie
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Iranian Center for Endodontic Research 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5911292/
https://www.ncbi.nlm.nih.gov/pubmed/29707013
http://dx.doi.org/10.22037/iej.v13i2.19089
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author Monteiro, Jaiane Bandoli
Dal Piva, Amanda Maria de Oliveira
Tribst, João Paulo Mendes
Borges, Alexandre Luiz Souto
Tango, Rubens Nisie
author_facet Monteiro, Jaiane Bandoli
Dal Piva, Amanda Maria de Oliveira
Tribst, João Paulo Mendes
Borges, Alexandre Luiz Souto
Tango, Rubens Nisie
author_sort Monteiro, Jaiane Bandoli
collection PubMed
description INTRODUCTION: This study aimed to investigate the influence of the resection angle on the stress distribution of retrograde endodontic treated maxillary incisors under oblique-load application. METHODS AND MATERIALS: A maxillary central incisor which was endodontically treated and restored with a fiber glass post was obtained in a 3-dimensional numerical model and distributed into three groups according to type of resection: control; restored with fiber post without retrograde obturation, R45 and R90 with 45º and 90º resection from tooth axial axis, respectively and restored with Fuji II LC (GC America). The numerical models received a 45(º) occlusal load of 200 N/cm(2) on the middle of lingual surface. All materials and structures were considered linear elastic, homogeneous and isotropic. Numerical models were plotted and meshed with isoparametric elements, and the results were analyzed using maximum principal stress (MPS). RESULTS: MPS showed greater stress values in the bone tissue for control group than the other groups. Groups with apicectomy showed acceptable stress distribution on the fiber post, cement layer and root dentin, presenting more improved values than control group. CONCLUSION: Apicectomy at 90(º) promotes more homogeneity on stress distribution on the fiber post, cement layer and root dentin, which suggests less probability of failure. However, due to its facility and stress distribution also being better than control group, apicectomy at 45(°) could be a good choice for clinicians.
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spelling pubmed-59112922018-04-27 The Effect of Resection Angle on Stress Distribution after Root-End Surgery Monteiro, Jaiane Bandoli Dal Piva, Amanda Maria de Oliveira Tribst, João Paulo Mendes Borges, Alexandre Luiz Souto Tango, Rubens Nisie Iran Endod J Original Article INTRODUCTION: This study aimed to investigate the influence of the resection angle on the stress distribution of retrograde endodontic treated maxillary incisors under oblique-load application. METHODS AND MATERIALS: A maxillary central incisor which was endodontically treated and restored with a fiber glass post was obtained in a 3-dimensional numerical model and distributed into three groups according to type of resection: control; restored with fiber post without retrograde obturation, R45 and R90 with 45º and 90º resection from tooth axial axis, respectively and restored with Fuji II LC (GC America). The numerical models received a 45(º) occlusal load of 200 N/cm(2) on the middle of lingual surface. All materials and structures were considered linear elastic, homogeneous and isotropic. Numerical models were plotted and meshed with isoparametric elements, and the results were analyzed using maximum principal stress (MPS). RESULTS: MPS showed greater stress values in the bone tissue for control group than the other groups. Groups with apicectomy showed acceptable stress distribution on the fiber post, cement layer and root dentin, presenting more improved values than control group. CONCLUSION: Apicectomy at 90(º) promotes more homogeneity on stress distribution on the fiber post, cement layer and root dentin, which suggests less probability of failure. However, due to its facility and stress distribution also being better than control group, apicectomy at 45(°) could be a good choice for clinicians. Iranian Center for Endodontic Research 2018 /pmc/articles/PMC5911292/ /pubmed/29707013 http://dx.doi.org/10.22037/iej.v13i2.19089 Text en This is an Open Access article distributed under the terms of the Creative Commons Attribution License, (http://creativecommons.org/licenses/by/3.0/) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Monteiro, Jaiane Bandoli
Dal Piva, Amanda Maria de Oliveira
Tribst, João Paulo Mendes
Borges, Alexandre Luiz Souto
Tango, Rubens Nisie
The Effect of Resection Angle on Stress Distribution after Root-End Surgery
title The Effect of Resection Angle on Stress Distribution after Root-End Surgery
title_full The Effect of Resection Angle on Stress Distribution after Root-End Surgery
title_fullStr The Effect of Resection Angle on Stress Distribution after Root-End Surgery
title_full_unstemmed The Effect of Resection Angle on Stress Distribution after Root-End Surgery
title_short The Effect of Resection Angle on Stress Distribution after Root-End Surgery
title_sort effect of resection angle on stress distribution after root-end surgery
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5911292/
https://www.ncbi.nlm.nih.gov/pubmed/29707013
http://dx.doi.org/10.22037/iej.v13i2.19089
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