Relevance. Dental trauma prevalence is high among children. Treatment of intrusive luxation, where the choice of treatment technique depends on the root formation stage, is of particular interest.Clinical case description. The article presents the treatment results of an 8-year-old patient with mixed dentition. The patient was diagnosed with an intrusive luxation of teeth 1.1, 2.1, soft tissue contusion, and fracture of the maxillary alveolar process.Thirteen days after the injury, we started the orthodontic treatment with a bracket system (ROTH 018 Micro-Sprint) placed on the upper teeth, controlled by cone-beam computed tomography (CBCT). Arches and elastics were consecutively changed during the treatment. In nine and a half months, teeth 1.1 and 2.1 were extruded. Functional and aesthetic parameters were restored. We assessed stability of the obtained result 18 months after the start of orthodontic treatment.Conclusion. The intrusive luxation treatment planning calls for a thorough history and diagnosis data comparison. The choice of non-surgical treatment without tooth extraction requires informing the patient about possible complications, treatment difficulties and long-term follow-up observation. The successful treatment outcome needs comprehensive patient management by a multidisciplinary team of a maxillofacial surgeon, pediatric dentist, orthodontist and other related specialists, if necessary.

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Abstract. Despite the decrease in the prevalence and experience of dental caries in 12-year-old children in the Arctic zone of the Russian Federation, the quality of life associated with dental health remains low. Consumption of sweet foods has been reported to be associated with low quality of life. However, associations between nutritional factors and dental caries remain poorly studied in Russia, particularly in the Arctic using the World Health Organization criteria. Aims. To study associations between nutritional risk factors and the prevalence and experience of dental caries among 12-year-old children in Arkhangelsk region using the World Health Organization criteria. Materials and methods. In total, 1162 -year-old children participated in a cross-sectional study using the WHO methodology. Bivariate associations between the frequency of consumption of the studied foods and caries were studied using Pearson's chi-squared tests. Associations between average values ​​of the DMFT index and its components across frequency categories of nutritional factors were assessed by a multivariable Poisson regression. Results.Adolescents drinking soft drinks once a day or more often had significantly more filled teeth than those in the reference group (p=0.003). An inverse association was observed between the frequency of tea/coffee/milk consumption and mean DMFT (p=0.041), which was largely attributed to the differences in the number of filled teeth (p=0.009). The number of filled teeth among those who consumed tee/coffee/milk at least once a day was 8% lower than in the reference group. Conclusion. We observed significant associations between caries experience and consumption of soft drinks and tee/coffee/milk with sugar among adolescents. Measures aimed at reduction of consumption of these items should be included in caries prevention programs. Key words. Dental caries; nutrition; socio-demographic factors; children; Russia; Arctic.

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