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Fracture resistance of endodontically treated teeth restored with glass fiber posts of different lengths.

Authors :
Franco EB
Lins do Valle A
Pompéia Fraga de Almeida AL
Rubo JH
Pereira JR
Source :
The Journal of prosthetic dentistry [J Prosthet Dent] 2014 Jan; Vol. 111 (1), pp. 30-4. Date of Electronic Publication: 2013 Oct 22.
Publication Year :
2014

Abstract

Statement of Problem: Endodontically treated teeth are known to have reduced structural strength. Glass fiber posts may influence fracture resistance and should be evaluated.<br />Purpose: The purpose of this study was to evaluate the influence of glass fiber post length on the fracture resistance of endodontically treated teeth.<br />Material and Methods: Forty intact human maxillary canines were selected and divided into 4 groups, the control group consisting of teeth restored with a custom gold cast post and core, with a length of two-thirds of the root. Other groups received prefabricated glass fiber posts in different lengths: group 1/3, removal of one-third of the sealing material (5 mm); group 1/2, removal of one-half of the sealing material (7.5 mm); and group 2/3, removal of two-thirds of the sealing material (10 mm). All the posts were cemented with resin cement, and the specimens with glass fiber posts received a composite resin core. All the specimens were restored with a metal crown and submitted to a compressive load until failure occurred. The results were evaluated by 1-way ANOVA, and the all pairwise multiple comparison procedures (Tukey honestly significantly difference test) (α=.05).<br />Results: The ANOVA showed significant differences among the groups (P<.002). The Tukey test showed that the control group presented significantly higher resistance to static load than the other groups (control group, 634.94 N; group 1/3, 200.01 N; group 1/2, 212.17 N; and group 2/3, 236.08 N). Although teeth restored with a cast post and core supported a higher compressive load, all of them fractured in a catastrophic manner. For teeth restored with glass fiber posts, the failure occurred at the junction between the composite resin core and the root.<br />Conclusion: The length of glass fiber posts did not influence fracture load, but cast post and cores that extended two-thirds of the root length had significantly greater fracture resistance than glass fiber posts.<br /> (Copyright © 2014 Editorial Council for the Journal of Prosthetic Dentistry. Published by Mosby, Inc. All rights reserved.)

Details

Language :
English
ISSN :
1097-6841
Volume :
111
Issue :
1
Database :
MEDLINE
Journal :
The Journal of prosthetic dentistry
Publication Type :
Academic Journal
Accession number :
24161260
Full Text :
https://doi.org/10.1016/j.prosdent.2013.09.013