Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2013 Mar;16(2):139-43.
doi: 10.4103/0972-0707.108196.

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

Ataís Bacchi  1 , Mateus Bertolini Fernandes Dos Santos, Marcele Jardim Pimentel, Conrado Reinoldes Caetano, Mário Alexandre Coelho Sinhoreti, Rafael Leonardo Xediek Consani
Affiliations

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

Ataís Bacchi et al. J Conserv Dent. 2013 Mar.

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.

Keywords: Fracture strength; intracanal posts; root canal.

PubMed Disclaimer

Conflict of interest statement

Conflict of Interest: None declared

Figures

Figure 1
Figure 1
Schematic illustration of the fracture pattern and reparability of the roots
See this image and copyright information in PMC

References

    1. Clavijo VG, Reis JM, Kabbach W, Silva AL, Oliveira Junior OB, Andrade MF. Fracture strength of flared bovine roots restored with different intraradicular posts. J Appl Oral Sci. 2009;17:574–8. - PMC - PubMed
    1. Juloski J, Radovic I, Goracci C, Vulicevic ZR, Ferrari M. Ferrule effect: A literature review. J Endod. 2012;38:11–9. - PubMed
    1. de Oliveira JA, Pereira JR, Lins do Valle A, Zogheib LV. Fracture resistance of endodontically treated teeth with different heights of crown ferrule restored with prefabricated carbon fiber post and composite resin core by intermittent loading. Oral Surg Oral Med Oral Pathol Oral Radiol Endod. 2008;106:e52–7. - PubMed
    1. Bergman B, Lundquist P, Sjögren U, Sundquist G. Restorative and endodontic results after treatment with cast posts and cores. J Prosthet Dent. 1989;61:10–5. - PubMed
    1. Sidoli GE, King PA, Setchell DJ. An in vitro evaluation of a carbon fiber-based post and core system. J Prosthet Dent. 1997;78:5–9. - PubMed