Resumo

SOUZA, Márcio Roberto Praseres de; COSTA, Elizabeth Lima; ALVES, Cláudia Maria Coelho  e  COSTA, José Ferreira. Effect of the cavity's geometric shape and the type of adhesive on microleakage in class V restorations. Odontol. Clín.-Cient. (Online) [online]. 2010, vol.9, n.4, pp. 341-344. ISSN 1677-3888.

It was evaluated "in vitro" the shape of the cavity influence and the type of adhesive (single bottle and self-etching primer) on microleakage, in class V restorations. In 40 bovine incisors were prepared 40 cavities with margins in enamel, 20 rectangular and 20 circular. Then, were divided into four groups (n = 10) according to the adhesive and geometrical form: group 1 - circular / single bottle adhesive, Group 2 - rectangular / single bottle adhesive, Group 3 - rectangular / self-etching primer adhesive, group 4 - circular / self-etching primer adhesive. The cavities were restored with composite resin Tetric Ceram^® with only one increment. Then the teeth w ere stored at 37ºC, for 30 days , and then sealed with cosmetic nail varnish and immersed in a 50% solution of silver nitrate for 2 hours, washed and immersed in revealing solution for 6 hours. After that, the samples were sectioned and examined under stereoscopic loupe of 25X. Data were subjected to non-parametric Kruskal-Wallis statistical analysis (p <0.05) which showed statistically significant difference among the groups. It was concluded that: The single-bottle adhesive associated with circular cavity behaved statistically significant according to the other combinations, the circular cavities behaved significant in relation to the rectangular.

Palavras-chave : Dental Adhesives; Dental substrates; Microleakage; Cavity shape.