Cargando…
Fracture resistance of upper central incisors restored with different posts and cores
OBJECTIVES: To determine and compare the fracture resistance of endodontically treated maxillary central incisors restored with different posts and cores. MATERIALS AND METHODS: Forty-eight upper central incisors were randomly divided into four groups: cast post and core (group 1), fiber-reinforced...
Autores principales: | , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Korean Academy of Conservative Dentistry
2015
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4534728/ https://www.ncbi.nlm.nih.gov/pubmed/26295027 http://dx.doi.org/10.5395/rde.2015.40.3.229 |
_version_ | 1782385497181519872 |
---|---|
author | Rezaei Dastjerdi, Maryam Amirian Chaijan, Kamran Tavanafar, Saeid |
author_facet | Rezaei Dastjerdi, Maryam Amirian Chaijan, Kamran Tavanafar, Saeid |
author_sort | Rezaei Dastjerdi, Maryam |
collection | PubMed |
description | OBJECTIVES: To determine and compare the fracture resistance of endodontically treated maxillary central incisors restored with different posts and cores. MATERIALS AND METHODS: Forty-eight upper central incisors were randomly divided into four groups: cast post and core (group 1), fiber-reinforced composite (FRC) post and composite core (group 2), composite post and core (group 3), and controls (group 4). Mesio-distal and bucco-lingual dimensions at 7 and 14 mm from the apex were compared to ensure standardization among the groups. Twelve teeth were prepared for crown restoration (group 4). Teeth in other groups were endodontically treated, decoronated at 14 mm from the apex, and prepared for posts and cores. Resin-based materials were used for cementation in groups 1 and 2. In group 3, composite was used directly to fill the post space and for core build-up. All samples were restored by standard metal crowns using glass ionomer cement, mounted at 135° vertical angle, subjected to thermomechanical aging, and then fractured using a universal testing machine. Kruskal-Wallis and Mann-Whitney U tests were used to analyze the data. RESULTS: Fracture resistance of the groups was as follows: Control (group 4) > cast post and core (group 1) > fiber post and composite core (group 2) > composite post and core (group 3). All samples in groups 2 and 3 fractured in restorable patterns, whereas most (58%) in group 1 were non-restorable. CONCLUSIONS: Within the limitations of this study, FRC posts showed acceptable fracture resistance with favorable fracture patterns for reconstruction of upper central incisors. |
format | Online Article Text |
id | pubmed-4534728 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | The Korean Academy of Conservative Dentistry |
record_format | MEDLINE/PubMed |
spelling | pubmed-45347282015-08-20 Fracture resistance of upper central incisors restored with different posts and cores Rezaei Dastjerdi, Maryam Amirian Chaijan, Kamran Tavanafar, Saeid Restor Dent Endod Research Article OBJECTIVES: To determine and compare the fracture resistance of endodontically treated maxillary central incisors restored with different posts and cores. MATERIALS AND METHODS: Forty-eight upper central incisors were randomly divided into four groups: cast post and core (group 1), fiber-reinforced composite (FRC) post and composite core (group 2), composite post and core (group 3), and controls (group 4). Mesio-distal and bucco-lingual dimensions at 7 and 14 mm from the apex were compared to ensure standardization among the groups. Twelve teeth were prepared for crown restoration (group 4). Teeth in other groups were endodontically treated, decoronated at 14 mm from the apex, and prepared for posts and cores. Resin-based materials were used for cementation in groups 1 and 2. In group 3, composite was used directly to fill the post space and for core build-up. All samples were restored by standard metal crowns using glass ionomer cement, mounted at 135° vertical angle, subjected to thermomechanical aging, and then fractured using a universal testing machine. Kruskal-Wallis and Mann-Whitney U tests were used to analyze the data. RESULTS: Fracture resistance of the groups was as follows: Control (group 4) > cast post and core (group 1) > fiber post and composite core (group 2) > composite post and core (group 3). All samples in groups 2 and 3 fractured in restorable patterns, whereas most (58%) in group 1 were non-restorable. CONCLUSIONS: Within the limitations of this study, FRC posts showed acceptable fracture resistance with favorable fracture patterns for reconstruction of upper central incisors. The Korean Academy of Conservative Dentistry 2015-08 2015-07-24 /pmc/articles/PMC4534728/ /pubmed/26295027 http://dx.doi.org/10.5395/rde.2015.40.3.229 Text en ©Copyrights 2015. The Korean Academy of Conservative Dentistry. 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 | Research Article Rezaei Dastjerdi, Maryam Amirian Chaijan, Kamran Tavanafar, Saeid Fracture resistance of upper central incisors restored with different posts and cores |
title | Fracture resistance of upper central incisors restored with different posts and cores |
title_full | Fracture resistance of upper central incisors restored with different posts and cores |
title_fullStr | Fracture resistance of upper central incisors restored with different posts and cores |
title_full_unstemmed | Fracture resistance of upper central incisors restored with different posts and cores |
title_short | Fracture resistance of upper central incisors restored with different posts and cores |
title_sort | fracture resistance of upper central incisors restored with different posts and cores |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4534728/ https://www.ncbi.nlm.nih.gov/pubmed/26295027 http://dx.doi.org/10.5395/rde.2015.40.3.229 |
work_keys_str_mv | AT rezaeidastjerdimaryam fractureresistanceofuppercentralincisorsrestoredwithdifferentpostsandcores AT amirianchaijankamran fractureresistanceofuppercentralincisorsrestoredwithdifferentpostsandcores AT tavanafarsaeid fractureresistanceofuppercentralincisorsrestoredwithdifferentpostsandcores |