PH INDICATORS AND MICROCRYSTALIZATION OF ORAL LIQUID IN ADOLESCENTS OF 15-18 YEARS WHO STUDY IN DIFFERENT EDUCATIONAL INSTITUTIONS
Authors: Kaskova L.F. , Batig V.M. , Drozda I.I. , Mytchenok O.V. 
Published: June 2021

During the research it has been found that the hydrogen index and mineralizing potential of oral fluid in adolescents aged 15-18 who study in college is lower than in other study groups. The hydrogen index of college students increases slightly from 15 years to 17 years and reaches its maximum at 18 years. In schoolchildren and students of the university, an increase in the microcrystallization of oral fluid with age was observed, and in college students a decrease was noted. This indicates the need for preventative work with this cohort to identify risk factors that cause this situation.
A study of the micro crystallization of oral fluid revealed a difference depending on the institution in which adolescents study.
Comparison of school attenders at different ages did not reveal any significant difference, although the indicator at 15 years old was slightly lower than at 16, always corresponded to a satisfactory level of micro crystallization. In college students, the micro crystallization rate corresponded to a low level of 15 and 16 years old.
Comparison of the results of the examined 17-18 years old, who study at the college and the university, it was found that the mineralizing potential of oral fluid is lower in college students at both 17 and 18 years old than at university students. The rate of adolescents studying at the university corresponded to a satisfactory level and those of college students - low at both 17 and 18 years. A pattern indicates the deterioration of oral homeostasis in adolescents enrolled in college at all ages compared to schoolchildren and university students.
In university students it was found probable increase in the values of the indicator. College students have a decrease in the mineralizing properties of oral fluid with age, but such properties are not significant.
There were 540 teenagers who studied at school (107 people), college (317 people), university (116 people) in Chernivtsi. The age children were from 15 to 18 years. The study of the studied indicators was presented by the age and institution in which adolescents study.
The hydrogen index (pH) was investigated using a strip of indicator paper (pH 0-12, manufactured by Lachema, Czech Republic). The indicator tape was immersed in oral fluid and the color of the paper was changed.
The mineralizing potential of oral fluid was evaluated by its microcrystallization (PA Leus, 1977). Oral fluid collection was performed with a sterile pipette from the bottom of the oral cavity, at least 2 hours after a meal and rinsing with distilled water. Three drops of oral liquid were applied to ethyl alcohol and dried at room temperature. The drops, after drying, were examined using a microscope. The mineralizing potential of oral fluid was determined by the mean score, depending on the identified types of ISS.
Evaluation of microcrystallization was performed by H.M. Saifulina, O.R. Pozdeev in average scores depending on the types of crystal formation: 0.1-1.0 - very low level; 1.1- 2.0 - low; 2,1- 3,0 - satisfactory; 3.1-4.0 - high; 4.1-5.0 - very high.
The obtained results are processed by the method of variation statistics. Indicators at p£0.05 were considered available.
Our research found that the hydrogen index and mineralizing potential of oral fluid in adolescents aged 15-18, who study in college is lower than in other study groups. The hydrogen index of college students increases slightly from 15 years to 17 years and reaches its maximum at 18 years. In schoolchildren and students of the university, an increase in the micro crystallization of oral fluid with age was observed, and decrease was established in college visitors. This indicates the need for preventative work with this cohort to identify risk factors that cause this situation.