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ORIGINAL ARTICLE
Year : 2011  |  Volume : 14  |  Issue : 4  |  Page : 361-365

Effect of storage time on microtensile bond strength between quartz fiber post and composite core after different post surface treatments


1 Department of Operative Dentistry, School of Dentistry, Hamadan University of Medical Sciences, Hamadan, Iran
2 Department of Prosthetic Dentistry, School of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
3 Department of Prosthetic Dentistry, Tehran University of Medical Sciences, Tehran, Iran

Correspondence Address:
Shabnam Ebadi
Department of Operative Dentistry, School of Dentistry, Hamadan University of Medical Sciences, Hamadan
Iran
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0972-0707.87198

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Aim : The aim was to evaluate the influence of water storage on fiber post-resin composite adhesion after different postsurface treatments. Materials and Methods : Forty-two fiber posts were used. Half of them were treated by hydrogen-peroxide and the other half were sandblasted. The adhesive (Single Bond, 3M, USA) was applied on the post. Core was built-up using flowable composite (Ζlite Flow, Bisco, USA). The specimens were divided into eight groups. Group 1 was treated with H 2 O 2 . Groups 2-4 were treated with H2O2 but stored for 3, 6, and 9 months, respectively. Groups 5-8 were sandblasted and stored for 0, 3, 6, and 9 months. μTBS was measured and data analyzed using one-way ANOVA and Tukey HSD. The fractured surfaces were evaluated by a stereomicroscope. The morphology of interfaces was assessed under SEM. H 2 O 2 -treated groups showed higher bond-strength. Results : The effect of "surface-treatment method" and "storage-time" was significant (P<0.0001), but there was no significant difference for their interaction effect (P=0.05). Water aging significantly decreased μTBS. Conclusions : Water aging significantly decreased microtensile bond strength regardless of the type of post surface treatment.


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