Glass fiber post treatment - does it influence resin cement bond strength?

BORGES, Marciano de Freitas; TEIXEIRA, Gabriela Simões; MONTAGNER, Anelise Fernandes; SUSIN, Alexandre Henrique

Abstract Introduction Glass-fiber posts are used in order to improve the retention of restorations in endodontically treated teeth. Objective To evaluate the bond strength of glass-fiber posts submitted to different surface treatments and cemented to the root canal dentin with self-adhesive resin cement. Material and method Thirty roots of human canines were prepared and divided according to two factors surface treatments (silane, 35% hydrogen peroxide, or sodium bicarbonate) and root thirds (cervical and middle thirds). The glass-fiber posts were cemented with self-adhesive resin cement (RelyX U200). After 24 h, the specimens were prepared for microtensile bond strength test (hourglass format), fracture pattern and micromorphological assessment by scanning electronic microscopy, in order to measure the cement line. Result The data (MPa and µm) were submitted to two-way ANOVA and Tukey's test (α = 5%). The surface treatments influenced the bond strength of the posts cemented with self-adhesive resin cement (p<0.00). The mean bond strength (standard deviations) differed according to the region of root dentin (p<0.00) the cervical region (Control 19.16MPa (3.71); Silane 25.65MPa (4.04); Hydrogen peroxide 24.43MPa (3.16); Sodium bicarbonate 37.42MPa (8.27)) showed higher bond strength values than the middle third of the root (Control 14.66MPa (4.65); Silane 12.52MPa (5.03); Hydrogen peroxide 10.64MPa (3.33); Sodium bicarbonate 10.87MPa (2.49)). Conclusion Treatment of the glass-fiber post surface with chemical and physical agents increased the bond strength of the cement-post-dentin interface in the cervical third and the treatment with Sodium bicarbonate showed better results in bond strength.

BVS Odontologia

Informação e Conhecimento para a Saúde

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Glass fiber post treatment - does it influence resin cement bond strength? / Pinos de fibra de vidro pós tratamento - influencia a resistência de união do cimento resinoso?

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