The main components of tooth enamel are calcium and phosphorus, they also form the basis of remineralizing drugs. The article presents the results of determining the content of calcium and phosphorus (mmol/l) in the unstimulated oral fluid of the subjects, as well as the dynamics of change over time (before the start of the use of remineralizing agents, at 5 minutes, one hour after the start of the study), as well as the calculation of the Ca/P ratio. To assess the effect of the express effect of different remineralizing agents, relationships were found between the content of calcium and phosphorus ions in the unstimulated oral fluid: standard deviations of the content of calcium and phosphorus ions were calculated, and the coefficients of linear correlation r-Pearson were determined. If for the 1 group and the 2 group the standard deviation of calcium ion content before the experiment and after 5 minutes is quite close, then 1 hour after express exposure in both groups the calcium content differs by 2.5 times. Analysis of the standard deviation in the 1 and phosphorus 2 group shows that before the express exposure, the value in the 1 group is 1.8 times higher than in the 2 group, and 5 minutes after the express exposure, the values differ by 8.9 times, while 1 hour after the express exposure, the values in the 1 group and in the 2 group differ by only 1.4 times. The coefficients of the r-Pearson linear correlation vary over a wide range of values: from -0.60 to 0.95.