| Autor: |
Luis Leonildo, Boff, Márcio Lima, Grossi, Luiz Henrique Maykot, Prates, Luiz Henrique, Burnett, Rosemary Sadami Arai, Shinkai |
| Rok vydání: |
2007 |
| Předmět: |
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| Zdroj: |
Quintessence international (Berlin, Germany : 1985). 38(5) |
| ISSN: |
1936-7163 |
| Popis: |
To evaluate the effect of the activation mode of adhesive cementation on push-out bond strength of fiber-reinforced resin posts to root canal dentin.Forty mandibular premolars were endodontically treated and randomly divided into 4 equal groups. In groups G-1, G-2, and G-3, Single Bond (3M Espe) was applied and light polymerized for 20 seconds; in group G-4, Scotchbond Multi-Purpose Plus (3M Espe) was used as an autopolymerized adhesive. The dual-cure resin cement Rely X ARC (3M Espe) was light polymerized in G-2 and G-3 but not in G-1 and G-4. The translucent post Light-Post (Bisco) was used in G-3 and the opaque post Aestheti-Plus (Bisco) in the other groups. The roots were sectioned in 3 parts (cervical, middle, apical); each slice was submitted to the push-out test at a crosshead speed of 0.5 mm/min. Data were analyzed by analysis of variance and Tukey test (a = .05).Light polymerization of both the adhesive and resin cement in G-2 led to significantly higher bond strength than in G-1, where only the adhesive was light polymerized. No difference was found between G-2 (opaque post) and G-3 (translucent post). The autopolymerized adhesive showed the highest bond strength in all root regions. The middle and apical post/root regions had similar bond strength, but it was significantly lower than that in the cervical region (P.001).Bond strength to root dentin varied as a function of the activation mode of post adhesive cementation and post/root regions. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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