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Mechanical properties related to the microstructure of seven different fiber reinforced composite posts
PURPOSE: The aim of this in vitro study was to evaluate the mechanical properties (bending strength and hardness) of seven different fiber reinforced composite posts, in relation to their microstructural characteristics. MATERIALS AND METHODS: Two hundred eighty posts were divided into seven groups...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Korean Academy of Prosthodontics
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5179481/ https://www.ncbi.nlm.nih.gov/pubmed/28018560 http://dx.doi.org/10.4047/jap.2016.8.6.433 |
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author | Alonso de la Peña, Víctor Darriba, Iria L Caserío Valea, Martín Guitián Rivera, Francisco |
author_facet | Alonso de la Peña, Víctor Darriba, Iria L Caserío Valea, Martín Guitián Rivera, Francisco |
author_sort | Alonso de la Peña, Víctor |
collection | PubMed |
description | PURPOSE: The aim of this in vitro study was to evaluate the mechanical properties (bending strength and hardness) of seven different fiber reinforced composite posts, in relation to their microstructural characteristics. MATERIALS AND METHODS: Two hundred eighty posts were divided into seven groups of 40, one group for each type of post analyzed. Within each group, 15 posts were subjected to three-point bending strength test, 15 to a microhardess meter for the Knoop hardness, and 10 to Scanning Electron Microscope in order to determine the diameter of the fibers and the percentage of fibers embedded in the matrix. To compare the flexural strength in relation to the type of fiber, matrix, and the hardness of the posts, a Kruskal-Wallis H test was used. The Jonckheere-Terpstra test was used to determine if the volume percent of fibers in the post influenced the bending strength. RESULTS: The flexural strength and the hardness depended on the type of fibers that formed the post. The lower flexural strength of a post could be due to deficient bonding between the fiber and the resin matrix. CONCLUSION: According to the results, other factors, besides the microstructural characteristics, may also influence the mechanical properties of the post. The feature that has more influence on the mechanical properties of the posts is the type of fiber. |
format | Online Article Text |
id | pubmed-5179481 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | The Korean Academy of Prosthodontics |
record_format | MEDLINE/PubMed |
spelling | pubmed-51794812016-12-23 Mechanical properties related to the microstructure of seven different fiber reinforced composite posts Alonso de la Peña, Víctor Darriba, Iria L Caserío Valea, Martín Guitián Rivera, Francisco J Adv Prosthodont Original Article PURPOSE: The aim of this in vitro study was to evaluate the mechanical properties (bending strength and hardness) of seven different fiber reinforced composite posts, in relation to their microstructural characteristics. MATERIALS AND METHODS: Two hundred eighty posts were divided into seven groups of 40, one group for each type of post analyzed. Within each group, 15 posts were subjected to three-point bending strength test, 15 to a microhardess meter for the Knoop hardness, and 10 to Scanning Electron Microscope in order to determine the diameter of the fibers and the percentage of fibers embedded in the matrix. To compare the flexural strength in relation to the type of fiber, matrix, and the hardness of the posts, a Kruskal-Wallis H test was used. The Jonckheere-Terpstra test was used to determine if the volume percent of fibers in the post influenced the bending strength. RESULTS: The flexural strength and the hardness depended on the type of fibers that formed the post. The lower flexural strength of a post could be due to deficient bonding between the fiber and the resin matrix. CONCLUSION: According to the results, other factors, besides the microstructural characteristics, may also influence the mechanical properties of the post. The feature that has more influence on the mechanical properties of the posts is the type of fiber. The Korean Academy of Prosthodontics 2016-12 2016-12-15 /pmc/articles/PMC5179481/ /pubmed/28018560 http://dx.doi.org/10.4047/jap.2016.8.6.433 Text en © 2016 The Korean Academy of Prosthodontics http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Alonso de la Peña, Víctor Darriba, Iria L Caserío Valea, Martín Guitián Rivera, Francisco Mechanical properties related to the microstructure of seven different fiber reinforced composite posts |
title | Mechanical properties related to the microstructure of seven different fiber reinforced composite posts |
title_full | Mechanical properties related to the microstructure of seven different fiber reinforced composite posts |
title_fullStr | Mechanical properties related to the microstructure of seven different fiber reinforced composite posts |
title_full_unstemmed | Mechanical properties related to the microstructure of seven different fiber reinforced composite posts |
title_short | Mechanical properties related to the microstructure of seven different fiber reinforced composite posts |
title_sort | mechanical properties related to the microstructure of seven different fiber reinforced composite posts |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5179481/ https://www.ncbi.nlm.nih.gov/pubmed/28018560 http://dx.doi.org/10.4047/jap.2016.8.6.433 |
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