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Disinfection of dentistry instruments pre-washing is a extremely important procedure in daily clinic. however, the use of disinfecting solutions must not alter the surface of dentistry instruments, favoring bacterial adherence. The purpose of this study was to evaluate the adherence of Staphylococcus aureus before and after cycling for 28 days with different disinfecting solutions: 2% glutaraldehyde, 100% vinegar and 0.2% peracetic acid. Control group suffered cycling with distilled water during the same period. Fifty specimens were sterilized and submitted to adherence testing before and after cycling, being immersed in brain and heart infusion broth and 0.1 mL of S. aureus standard suspension (10 cells/mL). Then, microorganisms adhered to the specimens were dispersed, diluted and evaluated by plating method to determine the number of cell forming units (cfu/mL). Data was transformed into base 10 logarithms and analyzed through Student’s t statistical test. results showed significant differences between the control group and the disinfecting solutions, but peracetic acid showed lower S. aureus adherence post-cycling, followed by glutaraldehyde and vinegar, with no differences between them showing that these disinfecting solutions can be used with no hazards on the adherence of this microorganism n stainless steel.

Influência de agentes desinfetantes sobre a aderência de Staphylococcus aureus em aço inoxidável