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The Impact of Bonding Agent Composition on Flexural Strength of Fiber-Reinforced Composite | ||
| Journal of Dentistry | ||
| مقاله 10، دوره 12، شماره 3، آذر 2011، صفحه 261-270 اصل مقاله (294.47 K) | ||
| نوع مقاله: Original Article | ||
| نویسندگان | ||
| Farahnaz Sharafddein1؛ AA. Alavi2؛ F. Moshref Javadi* 3 | ||
| 1Dept. of Operative Dentistry, Biomaterial Research Center, School of Dentistry, Shiraz University of Medical Science, Shiraz, Iran. | ||
| 2Dept. of Operative Dentistry, Biomaterial Research Center, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran | ||
| 3Dept. of Operative Dentistry, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran | ||
| چکیده | ||
| Statement of Problem: Bonding agent composition for impregnation of fiber may increase the flexural strength of fiber-reinforced composites by means of increasing adhesion. Purpose: Investigating the impact of filler of four commercial bonding agents with different hydrophobicity on the flexural strength of a fiber-reinforced composite. Materials and Method: In this experimental study, six groups (N=15 per group) of polyethylene fiber-reinforced composite specimens were prepared. In group 1, the positive control group, the samples were prepared using composite and without fiber, whereas in group 2, as the negative group, fiber-reinforced composite without any bonding agent resination was used. The fibers in group 3 to 6 were resinated with Single bond 2, Single bond, Resist, and all bond 3, respectively. Firstly, the fiber was placed in the base of the specimen preparation mold. Then the mold was filled with composite and cured. The specimens were stored in distilled water for 24 hours. In the next step, the flexural strength was measured in Three-point bending test with Instron machine at cross- head speed of 1 mm/min. Failure mode of the specimens was observed with stereomicroscope. At last, statistical analysis was performed using ANOVA and LSD post hoc tests ( p < 0.05). Results: Ono-way ANOVA test was used for evaluating the relationship among the groups, and for pair-wise comparison, LSD post-hoc test was used. One-way ANOVA test showed a significant difference among the groups. The All bond 3 group showed a significantly higher flexural strength than the other groups ( p <0.001). Groups 3 to 6 had significantly higher flexural strength than flexural strength of the control groups ( p <0.05). Conclusion: The choice of bonding agent can have a significant impact on the flexural properties of the fiber-reinforced composite. When filled hydrophobic bonding agent was used for impregnation of the fiber, compared to negative control group, flexural strength increased 4 fold. | ||
| کلیدواژهها | ||
| Fiber-reinforced composite؛ Flexural strength؛ Bonding | ||
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آمار تعداد مشاهده مقاله: 766 تعداد دریافت فایل اصل مقاله: 539 |
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