Avaliação da eficácia do bochecho com solução de digluconato de clorexidina a 0,12% no controle dos microrganismos no processo de moldagem com hidrocoloide irreversível

Abstract

The effectiveness of rinsing with chlorhexidine gluconate solution at 0.12% was evaluated for the control of microorganisms in the molding process with irreversible hydrocolloid. There were twenty-one patients selected and divided into two groups: G1 control – rinsing was held for 1 minute with saline solution; and experimental G2 – rinsing was done for 1 minute with chlorhexidine at 0.12%, and saliva was sampled at three experimental moments: before the rinsing, after the rinsing with the respective solutions, and after molding with irreversible hydrocolloid. The saliva collected was seeded through the technique of exhaustion with sterile handles calibrated 1uL into the culture medium CHROMagar Orientation® and left in a greenhouse with controlled temperature at 37ºC for 24 hours. The results assessed by the Dual Analysis of Variance with a significance level of 5% showed a reduction in microbial counts throughout the different experimental moments in the two groups selected, presenting statistically significant difference (p < 0.001), and for the experimental group the reduction of Streptococcus sp. and Staphylococcus sp. or Neisseria sp. was 94% while for the control group was 25% for Staphylococcus sp. or Neisseria sp. and 28% for Streptococcus sp. The antisepsis with chlorhexidine at 0.12% was proven to be effective in controlling microbial population of the oral cavity, preventing contamination with high population levels of Gram-positive and Gram-negative as well as in the mouth along the lines of irreversible hydrocolloid. Despite the favorable results found, the indication of surgery and clinical protocol requires more studies on the use by risk groups for investigation of possible carcinogenic effects of chlorhexidine, the formation of resistant strains as well as the environmental impact caused by disposal of this material.