Antimicrobial activity of different root canal filling pastes used in deciduous teeth

The purpose of this study was to evaluate in vitro the antimicrobial activity of materials used as root canal filling in deciduous teeth by direct exposure test. The materials tested were: Guedes-Pinto, CTZ, zinc oxide eugenol, Calen®, L&C and MTA pastes. A microbial mixture was prepared with 1 mL each of pure suspension of the following microorganisms: Staphylococcus aureus, Enterococcus faecalis, Pseudomonas aeruginosa, Bacillus subtilis, Candida albicans. For the direct exposure test, sterilized paper points were contaminated with the microbial mixture suspension and placed in contact with...