THE INFLUENCE OF NASAL BREATHING DISORDERS ON THE ORAL FLUID PARAMETERS IN PRESCHOOL CHILDREN

Dental caries is the most common dental disease in preschool children. Negative changes in the quantitative and qualitative parameters of oral fluid create optimal conditions for the development of cariogenic situation. One of the most important factors of oral cavity homeostasis changes in children of 3-6 years old is a persistent disorder in nasal breathing. 
The aim of the research is to determine the rate of saliva secretion and mixed saliva viscosity for their possible implementation as the biomarkers of risk of tooth caries appearence and justification of therapeutic and preventive measures prescription for elimination of the cariogenic situation in preschool children with persistent nasal breathing disorders. The rate of salivation and the viscosity of oral fluid were determined according to the method of Redynova T. L., Pozdeev A. R. (1994). 
The analysis of the obtained data on the rate of salivation of the examined children of the main and control groups revealed that the average value is within the normal range or at the lower margin of the parameter. A 1.5-fold decrease in the rate of salivation was found in children with persistent nasal breathing disorders compared to practically healthy children (р≤0.05). A more pronounced parameter decrease is observed in case of deciduous teeth presense. The average value of the viscosity of oral fluid is 2 times higher in children with persistent nasal breathing disorders than in the control group (р≤0.05). Higher viscosity of mixed saliva was found in children with caries than in children without it, but in the main group the numerical values were significantly higher (р≤0.05). 
The obtained data confirms the possibility of implementation of the determination of saliva secretion and viscosity rate as biomarkers of the tooth caries development in preschool children and provide an opportunity to control the application of therapeutic and preventive measures, considering the presence of nasal breathing disorders.