Relevance. Oral health in children largely depends on parental involvement and the formation of adequate oral care skills. Parental awareness of oral disease prevention and adherence to the recommendation of pediatric dentists or dental hygienists are paramount for dental disease onset. Therefore, the assessment of parental knowledge about oral prevention is relevant.Aim. To evaluate the oral health education of parents of children under seven y.o. on oral disease prevention.Materials and methods. The study anonymously surveyed 250 parents of children under seven y.o., living in Barnaul. The survey in Google Forms included questions about parental awareness of dental diseases, the frequency of dental visits, parental knowledge of the child's home oral care and the child's diet. The study results were statistically processed using the MS Excel 2007 program.Results. The survey of Barnaul parents of children under seven demonstrated that 50% of the children were breastfed, and almost no one used dairy products as the main drink. Despite the knowledge about the importance of caries treatment in children, most parents (68%) visit a dentist when dental disease symptoms appear. The dentist is not always the principal source of information about dental diseases in children and their prevention. The parents selected oral hygiene products and items independently in most cases, without considering the child's individual dental status characteristics. Some parents believe that they may skip brushing their primary teeth brushing at all.Conclusion. The results evidence the need to increase parental knowledge about dental disease prevention in children.

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Relevance. The question of diagnosing tooth decay and, thus, determining treatment methods is still very topical. There is a large number of techniques available for the diagnosis of dental caries in modern dentistry.Objective. The study aimed to compare different caries diagnosis methods to determine the most effective carious lesion detection.Material and methods. We examined in total 45 subjects, 1248 permanent teeth and 5700 tooth surfaces. The dental examination included three diagnostic techniques for each patient: visual-tactile, ICDAS II and quantitative light-induced fluorescence (QLF). The data were processed and presented graphically using Statistica 12.0 (Stat-Soft) and Microsoft Office Excel 2017 software.Results. According to the DMFS index, in the visual-tactile group, the "D" (decayed) was 3.00 ± 0.02 and the "F" (filled) was 1.93 ± 0.02. Caries intensity in this study group was 6.27 ± 0.58. The ICDAS II examination detected the average caries intensity of 6.93 ± 0.56 (p1-2 < 0.001). There were 3.47 ± 0.02 (p1-2 < 0.001) carious lesions. The "F" score was 2.13 ± 0.01 (p1-2 = 0.024). The QLF diagnostic method showed 7.44 ± 0.54 (p1-3 < 0.001, p2-3 = 0.006) as the mean intensity of caries in permanent teeth; there were 3.84 ± 0.02 (p1-3 < 0.001, p2-3 = 0.015) carious lesions and the "F" was 2.27 ± 0.01 (p1-3 = 0.018, p2-3 = 0.520). The "M" score was 0.27 ± 0.01 (p1-2 = 0.999, p1-3 = 0.999, p2-3 = 0.999), according to all applied techniques.Conclusion. The QLF method had the highest sensitivity and was superior to the visual-tactile method and ICDAS II.

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