The effect of adhesive systems on the pullout strength of a fiberglass-reinforced composite post system in bovine teeth
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Data
2005-12-01
Autores
Valandro, Luiz Felipe
Andreatta Filho, Osvaldo Daniel [UNESP]
Valera, Márcia Carneiro [UNESP]
Maximo de Araujo, Maria Amélia [UNESP]
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Resumo
Purpose: To evaluate the pullout strength of a glass fiber-reinforced composite post (glass FRC) cemented with three different adhesive systems and one resin cement. The null hypothesis was that pullout strengths yielded by the adhesive systems are similar. Materials and Methods: Thirty bovine teeth were selected. The size of the specimens was standardized at 16 mm by sectioning off the coronal portion and part of the root. The specimens were divided into three groups, according to the adhesive system, which were applied following the manufacturers' instructions: G1, ScotchBond Multi-Purpose Plus; G2, Single Bond; G3, Tyrian SPE/One-Step Plus. The glass FRCs (Reforpost) were etched with 37% H3PO4 for 1 min and silanized (Porcelain Primer). Thereafter, they were cemented with the dual resin cement En-Force. The specimens were stored for 24 h, attached to an adapted device, and submitted to the pullout test in a universal testing machine (1 mm/min). The data were submitted to the one-way ANOVA and Tukey's test (α = 0.05). Results: G1 (30.2 ± 5.8 Kgf) displayed the highest pullout strength (p < 0.001) when compared to G2 (18.6 ± 5.8 Kgf) and G3 (14.3 ± 5.8 Kgf), which were statistically similar. Analysis of the specimens revealed that all failures occurred between the adhesive system and the root dentin (pullout of the post cement), regardless of group. Conclusion: The multiple-bottle, total-etch adhesive system provided higher pullout strength of the glass FRC when compared to the single-bottle, total-etch, and single-step self-etching adhesive systems. The null hypothesis was rejected (p < 0.001).
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Adhesive systems, Bovine teeth, Fiber post, Pullout strength, bisphenol A bis(2 hydroxypropyl) ether dimethacrylate, dentin bonding agent, EnForce Sure Cure, EnForce-Sure Cure, glass, glass fiber, ONE STEP PLUS, ONE-STEP PLUS, phosphoric acid, resin, resin cement, Scotchbond Multi Purpose Plus, Scotchbond Multi-Purpose Plus, silane derivative, single bond, tooth cement, Tyrian SPE, animal, cattle, chemistry, dental acid etching, dental bonding, dental care, dentin, instrumentation, mechanical stress, tooth crown, tooth pulp, ultrastructure, Acid Etching, Dental, Animals, Bisphenol A-Glycidyl Methacrylate, Cattle, Composite Resins, Dental Bonding, Dental Cements, Dental Pulp Cavity, Dental Stress Analysis, Dentin, Dentin-Bonding Agents, Glass, Phosphoric Acids, Post and Core Technique, Resin Cements, Silanes, Stress, Mechanical
Como citar
Journal of Adhesive Dentistry, v. 7, n. 4, p. 331-336, 2005.