Abstract
Cross infection control is a way of life and it was realized that a radical changes inthe way of work in the dental clinic and laboratories would detect considerable revisesof traditional working patterns. Disinfection of dental stone cast by incorporation ofChlorhexidine gluconate CHX, Sodium hypochlorite and Madacide 11 separately in aconcentration of (0.5 , 0.5 , full strength) respectively according to the manufacturerinstructions and testing their activity against S.aureus, -haemolytic streptococcuspneumonia, pseudomonas aeruginosa and E. coli was performed. 5 trials were donefor each disinfectant solution and control (distilled water).The result showed that all the disinfectant solutions showed significant reductionof microbial growth in comparison with the control. Sodium hypochlorite sterilizedental stone cast followed by CHX.Sodium hypochlorite gave negative result for allthe tested microorganisms in all the trials followed by chlorhoxidine gluconatesolutions .Disinfection of stone cast is among recommended methods in infectioncontrol.Sodium hypochlorite was the best among the tested disinfected solutions.
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