Resumo

LOIOLA CORDEIRO, Rita de Cássia; BAFFI DINIZ, Michele; DE ALMEIDA RODRIGUES, Jonas  e  ORBEGOSO FLORES, Victor. Influencia de la técnica de preparación de cavidades sobre la microfiltración marginal. Acta odontol. venez [online]. 2008, vol.46, n.4, pp.460-464. ISSN 0001-6365.

The aim of this study was to evaluate the marginal microleakage in cavities with depth in bovine tooth dentin. Cavities preparation were made in two groups using conventional diamond burs associated with air turbine and ultrasonic CVD diamond tip with ultrasound. Cavities were restored with composite resin and after thermocycled, teeth were immersed in basic fucsin, sectioned, sandpapered and analyzed by an optical microscope. Microleakage quantitative evaluation was obtained through a digitalized image and a software program. Mann-Whitney test showed high amount of marginal microleakage in both groups without any statistically significant difference, suggesting that cavity preparation technique had no influence on marginal microleakage of composite resin restorations.

Palavras-chave : Composite Resins; Ultrasonics; Dental Cavity Preparation; Dental Leakage; Dental High- Speed Technique.