Abstract
Aim: The aim of this study, which took place between 2014 and 2016, was to compare the clinical efficiency of mineralised vanishes for the prevention of dental caries in first permanent molars in children in two primary schools in Minsk.
Methods: All 98 children, aged 9 years, who attended two schools in one randomly selected district of Minsk were divided into test (one school) and control (the other school) groups. Children in the test group were sub-divided into sub-groups A (n=33) and B (n=33). Sub-group A had 5% NaF and tricalcium-phosphate containing varnish twice a year, sub-group B 5% NaF varnish Children in control group (n=32) were examined with the same frequency. Regional Ethics Committee approval and parental informed consent were obtained. Six children in the control group and 12 (4+8) in test groups dropped out after two years. Caries preventive efficiency of vanishes was estimated by the indicators dental caries increment and reduction in numbers of carious teeth and surfaces after 24 months. The resulting data were statistically analysed using the chi-square test.
Results: There were no statistically significant differences regarding mean number of erupted permanent teeth (10.7, 12.0, 12.1), mean DMFT value (0.82, 0.84, 1.03) and DMFS (1.0, 1.0 and 1.25) between the two test and the control groups at baseline. After two years the number of permanent teeth increased to 15.7, 17.2 and 17.1 in the test and control groups respectively. An increase in the extent of dental caries and surfaces affected was observed in all groups. The increment in caries experience by DMFT and DMFS indices in test groups were: A (0.7; 1.0) and B (0.64; 0.84) and they were significantly lower compared to the control group (0.9, 1.2) p <0.05 and 1.47, 1,2 (p<0,001). The reduction in dental caries experience in terms of DMFT was 21.4% for the fluoride and tricalcium-phosphate vanish group and 28.02% for the fluorine-containing varnish group. In terms of DMFS this was 32% and 43% respectively.
Conclusions: The study results have shown the comparable caries preventive efficacy of mineralized varnishes on permanent teeth after two years of prevention.
The presenter of this abstract (3499) received a Borrow Travel Award
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