Habilidade de selamento de diferentes materiais restauradores adesivos

Lund, Rafael Guerra; Carvalho, Rodrigo Varella de; Rodrigues Junior, Sinval Adalberto; Demarco, Flávio Fernando

The purpose of this study was to evaluate the sealing ability of different adhesive restorative materials to bovine enamel and dentin. Ninety standard sauce-shaped Class V cavities with 3 mm of diameter × 2 mm of depth were prepared in the buccal and lingual faces of 45 bovine incisors. The gingival margin was located in dentin and the incisal margin in enamel. Teeth were randomly divided in 9 groups (n = 10) and restored with the following materials fve fowable composites, one microflled composite, one microhybrid composite, one compomer; and one resin-modifed glass ionomer cement (RMGIC). The restorations were made based on the manufacturer's instructions for adhesive treatment and restorative procedure. After polishing, the teeth were thermocycled and immersed in 2% basic fuchsin for 24 hours. Teeth were, then, serially sectioned generating 3 slices of 1 mm that were observed in a stereomicroscope under × 40 magnifcation. The degree of dye leakage was recorded as follows 0 - no leakage; 1 - leakage up to half the cavity; 2 - leakage in more than half of the cavity; 3 - extensive dye leakage, reaching the deepest portion of the cavity. Data was statistically analyzed using Kruskal-Wallis non-parametric test complemented with Bonferroni?s test when the difference between means was signifcant (alfa = 0,05). Extensive dye leakage was observed in dentin margins. The results were statistically higher than in enamel margins (Mann-Whitney U test (p < 0.001)). Compomer restorations produced the highest marginal sealing in dentin, differing from all other groups. The highest degree of dye leakage in enamel was produced by the microflled composite. The majority of the materials exhibited leakage-free margins in up to 70% of the specimens. Both, materials and substrate signifcantly infuenced the sealing ability.

BVS Odontología

Información y Conocimiento para la Salud

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Habilidade de selamento de diferentes materiais restauradores adesivos / Sealing ability of different adhesive restorative materials

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