[Dental caries among 15-year-old adolescents in Arctic Russia: a systematic review and meta-analysis].

Objective: The aim of the study is to perform a systematic search, qualitative synthesis, and a meta-analysis of scientific publications on the prevalence and experience of dental caries among 15-year-old adolescents in the Arctic zone of the Russian Federation.

Materials And Methods: A systematic review based on PRISMA guidelines. The review includes sources that describe the prevalence and intensity of caries in 15-year-old adolescents within the Arctic zone of the Russian Federation.

[Salivary minerals and caries experience among adolescents in Syktyvkar, Komi Republic].

Objective: To study the associations between salivary minerals concentrations and caries experience among adolescents in the conditions of one of the industrial centers of the Far North.

Material And Methods: In total, 146 adolescents aged 15-17 years took part in a cross-sectional study in Syktyvkar, Komi Republic. Caries experience was assessed as DMFT index and its components.

[Prevalence of dental anomalies and need for orthodontic treatment among adults in the Arctic part of the Arkhangelsk region].

Objective: The aim of the study is to study the prevalence of dental anomalies (DA) and assess the need for orthodontic treatment (NOT) among adults in the Arctic part of the Arkhangelsk region.

Materials And Methods: In total, 1068 adult residents of Arkhangelsk and Primorski rural district aged 35-90 years took part in a cross-sectional study. The Dental Aesthetic Index (DAI) was used to assess the prevalence of DA and NOT in the study population.

[Features of the course and adverse events risk of coronavirus infection COVID-19 in hematological diseases (data from the CHRONOS19 register for the Primorsky Territory, intermediate stage)].

Aim: To assess the characteristics of the course of coronavirus infection COVID-19 and to determine the risk factors for adverse events in patients of the regional hematological center.

Materials And Methods: As part of an observational prospective cohort study, data from 144 medical records of patients in Primorsky Krai with hematological diseases and COVID-19 were analyzed. The data of the developed standardized questionnaire of the CHRONOS19 study were used.

[Patients' situational anxiety across stages and types of orthodontic treatment].

Objective: The aim the studi. The study levels of situational anxiety of orthodontic patients depending on type and stage of treatment.

Material And Methods: Altogether, 162 consequent patients aged 14-25 years with various dental anomalies filled out a questionnaire with Spielberger test (State-Trait Anxiety Inventory).