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J Conserv Dent. 2018 Nov-Dec;21(6):613-617. doi: 10.4103/JCD.JCD_204_16.

Does ferrule thickness influence resistance to fracture of endodontically treated teeth?

Author information

1
Department of Restorative Dentistry, School of Dentistry, University of Pernambuco(FOP/UPE), Camaragibe, PE, Brazil.

Abstract

Background:

Teeth with severe crown destruction and endodontically treated may or may not present a circular strip of dental tissue located in the cervical region called ferrule.

Aims:

The aims of this study were to evaluate ferrule thickness influence on endodontically treated teeth (ETT) resistance to fracture.

Materials and Methods:

A total of 30 bovine incisor teeth were selected, endodontically treated and randomly distributed, according to the ferrule thickness: G1- no ferrule, G2 - 1 mm, and G3 - 2 mm. All the teeth were restored with prefabricated posts and composite resin. Resistance to fracture was established as the compression strength at 45° tilt at the lingual surface of the crown.

Statistical Analysis Used:

Data were analyzed using ANOVA and Tukey's test.

Results:

Resistance to fracture of G1 and G2 were significantly higher than that of G3 (P < 0.001). The pattern of fracture, common to all groups, occurred at the composite resin on the coronary portions.

Conclusion:

Ferrule thickness can influence the resistance to fracture of ETT.

KEYWORDS:

Dental restoration failure; dentistry; fatigue fracture

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