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Published in:

01-05-2016 | Original Article

Can cement film thickness influence bond strength and fracture resistance of fiber reinforced composite posts?

Authors: Alice Gonçalves Penelas, Valery Martins Piedade, Ana Carolina Oliveira da Silva Borges, Laiza Tatiana Poskus, Eduardo Moreira da Silva, José Guilherme Antunes Guimarães

Published in: Clinical Oral Investigations | Issue 4/2016

Abstract

Objectives

This study compared the influence of cement film thickness (CFT) on bond strength (BS) and fracture resistance (FR) of fiber-reinforced composite (FRC) posts to root canal.

Materials and methods

One hundred bovine incisors were used for BS and FR analysis (n = 10) and distributed into five experimental groups according to FRC post diameters (WhitePost DC no. 0.5, no. 1, no. 2, no. 3, no. 4), leading to five different CFTs. The canals were prepared using drill no. 4 provided by the post manufacturer and irrigated with 2.5 % NaOCl. After conditioning (24 % H₂O₂/5 min) and silanization, posts were cemented with resin cement. BS was evaluated using push-out test and FR using the compression test at 45°. A stereomicroscope was used to measure CFT and to analyze failure pattern. BS data were subjected to two-way ANOVA and Scheffé test for contrast (α = 0.05); FR data were subjected to one-way ANOVA.

Results

BS was significantly affected by CFT, as the most well-adapted post achieved the highest values (p < 0.05). BS was similar for all root thirds. CFT did not affect fracture resistance. No root fractures were observed.

Conclusions

A FRC post well adapted to the root canal results in higher BS values. Different CFTs did not influence the FR of teeth restored with FRC posts.

Clinical relevance

The results indicate that post retention is improved when a well-adapted post is used, although this has not been critical to fracture resistance.

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Title: Can cement film thickness influence bond strength and fracture resistance of fiber reinforced composite posts?
Authors: Alice Gonçalves Penelas
Valery Martins Piedade
Ana Carolina Oliveira da Silva Borges
Laiza Tatiana Poskus
Eduardo Moreira da Silva
José Guilherme Antunes Guimarães
Publication date: 01-05-2016
Publisher: Springer Berlin Heidelberg
Published in: Clinical Oral Investigations / Issue 4/2016
Print ISSN: 1432-6981
Electronic ISSN: 1436-3771
DOI: https://doi.org/10.1007/s00784-015-1568-3

ACC 2024 Congress

Springer Medicine

Can cement film thickness influence bond strength and fracture resistance of fiber reinforced composite posts?

Abstract

Objectives

Materials and methods

Results

Conclusions

Clinical relevance

ACC 2024 Congress

Springer Medicine

Abstract

Objectives

Materials and methods

Results

Conclusions

Clinical relevance

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