Estudo, in vitro, sobre a contaminação de cimentos endodônticos imediatamente e após utilização

Abstract

This study examines, in vitro, contamination by microorganisms of six cements endodontic: two based on zinc oxide and eugenol (EndoFill® and Fillcanal®), two based on epoxy resin (Sealer 26® and AH Plus®) and two based on calcium hydroxide (Sealapex® and MTA Fillapex®), commonly used in dental clinics, at the time of breakup of seal and after seven, 14 and 28 days. The materials studied were divided into groups and subgroups: Group 1) EndoFill®: A – powder, B – liquid, C – cement; Group 2) Fillcanal®: A – powder, B – liquid, C – cement; Group 3) Sealer 26®: A – powder, B – resin, C – cement; Group 4) AH Plus®: A – folder A, B – folder B, C – cement; Group 5) Sealapex®: A – base folder, B – catalyst folder, C – cement; Group 6) MTA Fillapex®: A – base folder, B – catalyst folder, C – cement; and then placed in 4 mL of culture medium Tryptone Soya Broth and Brain Heart Infusion Broth, selective media for bacteria and Sabouraud Dextrose Broth, selective medium for fungi and incubated respectively at 37°C for 48 hours at 25°C for 120 hours, in triplicate. Was subsequently held agitation and chiming of broths in 96 wells microplates under conditions of containing specific means for the growth of bacteria and fungi. The plates with the specific medium for growing bacteria were incubated at 37°C for 48 hours and the specific plating for fungi, kept at 25°C for 120 hours. As positive control were used Staphylococcus aureus and Candida albicans. For negative control was added to culture media 1 mL of NaCl 0.9%. According to the methodology used, the cements tested were resistant to contamination offered by the medium and can be considered a positive factor in relation to requirements for success of endodontic treatment.