Results before disinfection
Immediately after clinical use and manual pre-cleaning, a CFUs count ranging from 0 CFUs to countless CFUs(>500) was found(Table 1). In total, 16 of the 100 FEs in group 1 and 21 of the 100 FEs in group 2(EWD) showed no contamination(i.e., 0 CFUs) before disinfection and were excluded from additional analyses. After exclusion of the FEs that showed no contamination, a chi-square test was performed showing no statistically significant difference in the distribution of FEs depending on the CFUs count before disinfection between the study groups(p=0.72).