Flexural properties, morphology and bond strength of fiber-reinforced posts: influence of post pretreatment

The aim of this study was to assess the influence of surface pretreatments of fiber-reinforced posts on flexural strength (FS), modulus of elasticity (ME) and morphology of these posts, as well as the bond strength (BS) between posts and core material. Fifty-two fiber posts (smooth and serrated) wer...

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Published in:Brazilian dental journal 2012, Vol.23 (6), p.679-685
Main Authors: Braga, Neilor Mateus Antunes, Souza-Gabriel, Aline Evangelista, Messias, Danielle Cristine Furtado, Rached-Junior, Fuad Jacob Abi, Oliveira, Camila Fávero, Silva, Ricardo Gariba, Silva-Sousa, Yara T. Corrêa
Format: Article
Language:English
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Summary:The aim of this study was to assess the influence of surface pretreatments of fiber-reinforced posts on flexural strength (FS), modulus of elasticity (ME) and morphology of these posts, as well as the bond strength (BS) between posts and core material. Fifty-two fiber posts (smooth and serrated) were assigned to 4 groups (n=13): no treatment (control), 10% hydrogen peroxide (HP) for 10 min (HP-10), 24% HP for 1 min (HP-24) and airborne-particle abrasion (Al2O3). To evaluate FS and ME, a 3-point bending test was performed. Three posts of each group were examined by scanning electron microscopy. Composite resin was used as the core build-up and samples were sectioned to obtain microtensile sticks. Data were analyzed by ANOVA and Tukey's test (α=0.05). For FS, significant differences were observed between posts type and surface pretreatment (p
ISSN:0103-6440
0103-6440
DOI:10.1590/S0103-64402012000600009