Kazan', Kazan, Russian Federation
Kazan, Kazan, Russian Federation
UDK 616 Патология. Клиническая медицина
The goal of this paper was to study the risks of occurrence and development of caries of permanent molars in primary school-aged children and effectiveness of preventive measures from the nature of mixed saliva microcrystallization. Material and methods. The complex clinical and laboratory study involved 242 primary school-aged children. The observation included assessment of the cf (carious and filled teeth), cf + CFE (carious, filled and extracted teeth) and CFE indexes, as well as an increase in caries intensity (ICI), and the state of hygiene according to the index of Fedorov Y.A. – Volodkina V.V. (1971). Microcrystallization (SMC) was assessed in native oral fluid samples using the LEICA DM 1000 stereomicroscope. The experimental subjects were divided into two groups as follows: I – with SMC score 1, II – with SMC scores 2–3. To assess the differences in the frequency of dental lesions in the follow-up, the McNemar test with Edwards’s correction was used for intragroup comparisons and the chi-squared test with Yates’s correction for intergroup comparisons. To assess the relationship between the intensity of the lesion of the molars and the type of SMC, the contingency and association coefficients were calculated. Results. Examination of caries intensity in 1.6, 2.6, 3.6 and 4.6 teeth with SMC type 1 score showed no significant differences in the dynamics of caries intensity increase over three years of follow-up (p > 0.5), with SMC type 2–3 scores also showed no significant differences from baseline for 1.6, 2.6 and 3.6 teeth (p > 0.1), but revealed differences at the third year for 4.6 teeth (p < 0.05). When comparing the frequency of lesions of teeth 1.6, 2.6, 3.6 for groups with ISS type 1 and 2–3 points, significant differences were observed from the second year (p < 0.05), reaching the significance of differences p < 0.001 in the third year, intergroup comparisons for teeth 4.6 became significant already in the first year of observation (p < 0.05), for ISS type 2–3 points from the second year of observation, p < 0.05. Conclusion. The data obtained indicate a direct correlation between caries lesions of first molars and the nature of SMC.
caries, children, pathology, development risks, oral fluid microcrystallization
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