Results: In the crude analysis, there were significant differences between the 2 groups (caries free and high caries children) in percentage of children with non-stimulated salivary pH being equal to 5.0 - 6.6, non-stimulated salivary pH being equal to 5.0 - 6.6, the amounts of lactobacilli being above ≥ 105 CFU / ml and high frequency of sugar consumption.