Influence of post-thickness and material on the fracture strength of teeth with reduced coronal structure

Ataís Bacchi; Mateus Bertolini Fernandes dos Santos; Marcele Jardim Pimentel; Conrado Reinoldes Caetano; Mário Alexandre Coelho Sinhoreti; Rafael Leonardo Xediek Consani

doi:10.4103/0972-0707.108196

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$Influence of post-thickness and material on the fracture strength of teeth with reduced coronal structure$

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Influence of post-thickness and material on the fracture strength of teeth with reduced coronal structure

Ataís Bacchi, Mateus Bertolini Fernandes dos Santos, Marcele Jardim Pimentel, Conrado Reinoldes Caetano, Mário Alexandre Coelho Sinhoreti and Rafael Leonardo Xediek Consani

Journal of conservative dentistry, Vol.16(2), pp.139-143

03/2013

DOI: 10.4103/0972-0707.108196

PMCID: PMC3659859

PMID: 23716966

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Abstract

Purpose: To evaluate the fracture strength of endodontically treated teeth with reduced coronal structure reinforced with glass-fiber posts and cast posts and core (nickel–chromium alloy) with different thickness. Materials and Methods: Forty maxillary central incisors were sectioned at 1 mm of the cementoenamel junction and endodontically treated. The teeth were divided into four groups (n = 10) and restored with cast post and core and glass-fiber posts with diameters of 1.5 mm and 1.1 mm. The fracture strength was evaluated using a Universal Testing Machine (Instron 1144) at 45° of angulation. The results were submitted to analysis of variance two-way and Tukey's test (P < 0.05). The failure mode was also evaluated. Results: Cast post and core were statistically superior to the glass-fiber posts with the self-post diameter (P = 0.001). When the self-post material was considered, no significant difference was observed between the two post-diameters (P = 0.749). The glass-fiber post-groups presented more fractures in the cervical third than the cast post and core groups. Conclusion: Teeth restored with cast post and cores present higher fracture strength than those reinforced with glass-fiber posts. An increased post-thickness does not increase the fracture strength. Glass-fiber posts lead to less severe fractures.

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Title: Subtitle: Influence of post-thickness and material on the fracture strength of teeth with reduced coronal structure
Creators: Ataís Bacchi - Universidade Estadual de Campinas (UNICAMP)
Mateus Bertolini Fernandes dos Santos - Universidade Estadual de Campinas (UNICAMP)
Marcele Jardim Pimentel - Department of Prosthodontics and Periodontics, School of Dentistry, Campinas State University – FOP/UNICAMP, Av. Limeira, 901 Piracicaba, SP, Brazil
Conrado Reinoldes Caetano - Department of Prosthodontics and Periodontics, School of Dentistry, Campinas State University – FOP/UNICAMP, Av. Limeira, 901 Piracicaba, SP, Brazil
Mário Alexandre Coelho Sinhoreti - Department of Prosthodontics and Periodontics, School of Dentistry, Campinas State University – FOP/UNICAMP, Av. Limeira, 901 Piracicaba, SP, Brazil
Rafael Leonardo Xediek Consani - Department of Prosthodontics and Periodontics, School of Dentistry, Campinas State University – FOP/UNICAMP, Av. Limeira, 901 Piracicaba, SP, Brazil
Resource Type: Journal article
Publication Details: Journal of conservative dentistry, Vol.16(2), pp.139-143
DOI: 10.4103/0972-0707.108196
PMID: 23716966
PMCID: PMC3659859
NLM abbreviation: J Conserv Dent
ISSN: 0972-0707
eISSN: 0974-5203
Publisher: Medknow Publications & Media Pvt Ltd
Number of pages: 5
Language: English
Date published: 03/2013
Academic Unit: Prosthodontics
Record Identifier: 9984945917002771

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