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Fracture Strength of Flared Root Canals Restored with Different Post Systems

OBJECTIVE: To evaluate the fracture resistance of different intra-radicular post systems in flared root canals. METHODS: Sixty human canines were used. The coronal portion was removed and the root length was standardized at 17 mm. Canals were prepared and filled with gutta-percha/AH Plus sealer. Roo...

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Autores principales: Gehrcke, Vanessa, de Oliviera, Milene, Aarestrup, Fernando, do Prado, Maíra, de Lima, Carolina Oliveira, Campos, Celso Neiva
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Kare Publishing 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7757950/
https://www.ncbi.nlm.nih.gov/pubmed/33403333
http://dx.doi.org/10.14744/eej.2017.17009
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author Gehrcke, Vanessa
de Oliviera, Milene
Aarestrup, Fernando
do Prado, Maíra
de Lima, Carolina Oliveira
Campos, Celso Neiva
author_facet Gehrcke, Vanessa
de Oliviera, Milene
Aarestrup, Fernando
do Prado, Maíra
de Lima, Carolina Oliveira
Campos, Celso Neiva
author_sort Gehrcke, Vanessa
collection PubMed
description OBJECTIVE: To evaluate the fracture resistance of different intra-radicular post systems in flared root canals. METHODS: Sixty human canines were used. The coronal portion was removed and the root length was standardized at 17 mm. Canals were prepared and filled with gutta-percha/AH Plus sealer. Roots were embedded in self-polymerising acrylic resin blocks. According to the material used, the teeth were randomly divided into three groups (n=20): glass fibre post (GFP): GFP and Z350 resin composite core; pre-fabricated metal post (PMP): PMP and Z350 resin composite core; and cast metal core (CMC): CMC with silver-tin alloy. Coronal reconstruction involved fabrication of metal copings. Samples were submitted to mechanical compression testing at 45º in a universal test machine. Fracture pattern was evaluated under a stereoscope. The fracture strength values were submitted to one-way analysis of variance (ANOVA) and Tukey tests (α=0.05). RESULTS: There was no statistically significant difference between the resistance values among groups (P=0.193). With regard to fracture pattern, GFP showed 55% and PMP 45% of Type I fractures, which considered repairable or favourable, whereas MCC presented 50% of Type V, which was considered irreparable or unfavourable. CONCLUSION: Glass fibre and pre-fabricated metal posts have good fracture resistance to compression and may be used for restoring flared root canals, since they presented fractures mainly involving the filling core, thus facilitating later repair.
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spelling pubmed-77579502021-01-04 Fracture Strength of Flared Root Canals Restored with Different Post Systems Gehrcke, Vanessa de Oliviera, Milene Aarestrup, Fernando do Prado, Maíra de Lima, Carolina Oliveira Campos, Celso Neiva Eur Endod J Original Article OBJECTIVE: To evaluate the fracture resistance of different intra-radicular post systems in flared root canals. METHODS: Sixty human canines were used. The coronal portion was removed and the root length was standardized at 17 mm. Canals were prepared and filled with gutta-percha/AH Plus sealer. Roots were embedded in self-polymerising acrylic resin blocks. According to the material used, the teeth were randomly divided into three groups (n=20): glass fibre post (GFP): GFP and Z350 resin composite core; pre-fabricated metal post (PMP): PMP and Z350 resin composite core; and cast metal core (CMC): CMC with silver-tin alloy. Coronal reconstruction involved fabrication of metal copings. Samples were submitted to mechanical compression testing at 45º in a universal test machine. Fracture pattern was evaluated under a stereoscope. The fracture strength values were submitted to one-way analysis of variance (ANOVA) and Tukey tests (α=0.05). RESULTS: There was no statistically significant difference between the resistance values among groups (P=0.193). With regard to fracture pattern, GFP showed 55% and PMP 45% of Type I fractures, which considered repairable or favourable, whereas MCC presented 50% of Type V, which was considered irreparable or unfavourable. CONCLUSION: Glass fibre and pre-fabricated metal posts have good fracture resistance to compression and may be used for restoring flared root canals, since they presented fractures mainly involving the filling core, thus facilitating later repair. Kare Publishing 2017-10-02 /pmc/articles/PMC7757950/ /pubmed/33403333 http://dx.doi.org/10.14744/eej.2017.17009 Text en Copyright: © 2020 European Endodontic Journal http://creativecommons.org/licenses/by-nc/4.0 This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
spellingShingle Original Article
Gehrcke, Vanessa
de Oliviera, Milene
Aarestrup, Fernando
do Prado, Maíra
de Lima, Carolina Oliveira
Campos, Celso Neiva
Fracture Strength of Flared Root Canals Restored with Different Post Systems
title Fracture Strength of Flared Root Canals Restored with Different Post Systems
title_full Fracture Strength of Flared Root Canals Restored with Different Post Systems
title_fullStr Fracture Strength of Flared Root Canals Restored with Different Post Systems
title_full_unstemmed Fracture Strength of Flared Root Canals Restored with Different Post Systems
title_short Fracture Strength of Flared Root Canals Restored with Different Post Systems
title_sort fracture strength of flared root canals restored with different post systems
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7757950/
https://www.ncbi.nlm.nih.gov/pubmed/33403333
http://dx.doi.org/10.14744/eej.2017.17009
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