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28 Sep 2022 (Vol 45 , Iss 08 )

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30 Sep 2022 (Vol 45 , Iss 07 )

Journal ID : TMJ-18-08-2022-11376
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Title : Evaluation the effect of fiber-reinforced resin posts surface treatment on their bond strength with resin cement: An in-vitro study

Abstract :

Bonding fiber-reinforced resin posts with resin cement is a potential factor in contributing to the failure of these posts. Several methods have been proposed to treat the post surface to increase bonding strength: our results have proven controversial. This study aimed at evaluating the effects of three methods for treating the surface of a fiber post on its bond strength with resin cement. Forty-eight glass fiber posts were utilized and divided into three 16-specimened groups based on the surface treatment the participants received: G1 treated via implementing etching with hydrogen peroxide 10% and silanization, G2 with hydrofluoric acid 10% and silanization, and G3 by ethyl alcohol 70% that was the control group. The posts were cemented with dual-cured resin cement and were stored in distilled water at 37° Celsius for 24h. Then, the samples were subjected to tensile test by the general mechanical testing device, the testometric device. The bond strength in each sample of posts was recorded in newtons (N). Our data were analyzed using both the ANOVA and Bonferroni tests. The statistical study revealed that the mean values of bond strength were 400.08 ± 87.37 N, 396.26 ± 91.44 N, 304.65 ± 86.26 N, in the three groups respectively. A statistically significant difference was detected in bond strengths between the two test groups: on the one hand, the experimental G1 and G2 treated through etching with hydrogen peroxide or with hydrofluoric acid; on the other hand, the control G3 treated using ethyl alcohol. The p-value noticed in our research reached < 0.005. Hydrogen peroxide and hydrofluoric acid were found to contribute to increasing bond strength of fiber-reinforced resin posts used in this study with resin cement.

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