Kaskova L. F., Morgun N. A., Amosova L. I., Novikova S. Ch., Makovka I. L.

DENTISTRY

Scentific article

Oral liquid is surroundings for biological organs of the mouth, so changes in the composition and properties of oral liquid may contribute to the development of dental diseases. The aim of the study was to determine and compare the performance of the oral cavity homeostasis as a test of enamel resistance (TER), mineralized potential of oral liquid, changing the pH of oral liquid in children who live in areas with different content of fluoride in drinking water. The study involved 120 children aged 6 years, who lived in regions with different content of fluoride in drinking water (Poltava –optimal, Shishaki – high). The manifestations of dental fluorosis was examined by the WHO classification. Student­Fisher’s test was used to assess the validity of the results. Children from Poltava have high (1,75 ± 0,06 balls), children from Shishaki moderate enamel resistance (2,70 ± 0,06 balls), so difference is valid (P < 0,001). It was proved that the resistance of hard tissue decreases with increasing degree of dental fluorosis. TER test changed from 1,68 ± 0,07 at very mild fluorosis to 2,00 ± 0,11 at mild fluorosis in children from Poltava (P < 0,001). TER test changed from 2,40 ± 0,016 at mild fluorosis to 2,76 ± 0,06 at moderate fluorosis in children from Shisaki (P < 0,001). Our research has shown that children who live in region with high fluoride content in drinking water have mineralized potential of oral liquid 1,9 ± 0,06 balls, that is lower (P < 0,001) than children who live in region with optimal concentrations of fluoride (2,83 ± 0,06 balls). Mineralized potential of oral liquid decreases with increasing degree of dental fluorosis. Mineralized potential changed from 2,96 ± 0,06 at very mild fluorosis to 2,40 ± 0,16 at mild fluorosis in children from Poltava (P < 0,001). Mineralized potential changed from 2,00 ± 0,11 at mild fluorosis to 1,88 ± 0,05 at moderate fluorosis in children from Shisaki (P>0,05). The same pattern was found in the study of ΔpH of oral liquid. This index was 0,41 ± 0,007 balls in children from region with high fluoride content in drinking water and 0,33 ± 0,006 balls in children from region with optimal fluoride content in drinking water (P < 0,001). Also ΔpH of oral liquid increases with increasing degree of dental fluorosis. ΔpH changed from 0,32 ± 0,006 at very mild fluorosis to 0,37 ± 0,009 at mild fluorosis in children from Poltava (P < 0,001). ΔpH changed from 0,38 ± 0,009 at mild fluorosis to 0,41 ± 0,007 at moderate fluorosis in children from Shisaki (P < 0,05). Conclusions. It has revealed that fluorosis development occurs on the background of decline in the test enamel resistance, mineralizing potential indicator of oral liquid, and pH level. Such indexes deteriorate with increasing degree of dental fluorosis and fluoride level in drinking water. Obviously, these changes of the oral homeostasis worsen cariesogenic situation and cause increasing of caries level in children with increasing severity of dental fluorosis and fluoride content in drinking water. The prospect of further research. In the future, it is advisable to examine the influence of various treatment­ preventive measures on oral homeostasis indexes in regions with a high content of fluoride in drinking water.

children, fluorosis, oral homeostasis

«Bulletin of problems biology and medicine» Issue 3 part 2 (111), 2014 year, 358-360 pages, index UDK 616. 314­13­053. 5. 615:916