Resumo

LIMA, Felipe Coelho et al. Resistência de união de um sistema restaurador à base de silorano ao esmalte bovinoBond strength of a Silorane-based composite to bovine enamel. Odontol. Clín.-Cient. (Online) [online]. 2013, vol.12, n.3, pp.227-230. ISSN 1677-3888.

The purpose of this study was to evaluate the bond strength produced by a Silorane-based restorative system to enamel with or without prior acid etching. Twelve bovine incisors were selected. Then, the enamel was planned. The teeth were divided into two groups: Group 1 - a plateau was built in the enamel planned with P90 system (P90); Group 2 - a plateau was built in the enamel with prior etching using 37% phosphoric acid for 15s (P90A). Specimens (n=6) were sectioned in enamel/composite sticks to microtensile testing. The cross-sectional area of the sticks was measured. Beams were pulled until failure and bond strength was calculated. Data were statistically analyzed using ANOVA One-way and Tukey (p=0,05). Microtensile bond strength showed higher values to group 2 (P90A), that used prior etching to the adhesive system tested in the study. In conclusion prior etching with phosphoric acid increased microtensile bond strength values of the Silorane-based composite on bovine enamel.

Palavras-chave : Dental enamel; Acid etching dental; Dentin-bonding agents; Tensile strength..

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