The aim of the study was to evaluate correlation of dental system functional status and emotional stress level in young adults. The study involved 164 patients aged 20-25 years. TMJ dysfunction was diagnosed according to M. Ahlers and H. Jakstat criteria (2000). All patients underwent electromyography (EMG) of mastication muscles at rest and by functional test. Emotional stress and anxiety were assessed by Holmes and Rahe stress scale, Jakhin-Mendeleevich clinical questionnaire and State-Trait Anxiety Inventory. The study revealed correlation between EMG activity of masticatory muscles and emotional stress level highlighting the importance of stress assessment in TMJ dysfunction planning.

Background: Evaluation of the effectiveness of the integrated use of autogenous platelet plasma and 3D collagen matrix Fibromatrix for the regeneration of soft tissues of the oral cavity in the surgical treatment of Miller Class I gingival recession. Materials and Method: 25 patients were examined and treated. All patients underwent surgical treatment of gingival recession using two-layer techniques of eliminating gingival recession with «3D collagen matrix FibroMATRIX» for the regeneration of soft tissues of the oral cavity and autologous platelet plasma. In all cases, the rehydration of the collagen matrix was carried out in autogenous platelet plasma for 2 minutes. The result was evaluated after 7th day, 14th day, 1 and 3 months. Statistical processing of the studies was carried out in GraphPadPrism v.6.0, using the t-test, Mann-Whitney. Differences were considered significant at p <0.05. Results: Assessment of gingival recession closure and its significant (p <0.05) increase, corresponding to 85% efficiency after treatment in both groups of patients, no significant differences were found in both groups. The best clinical results were achieved in eliminating gingival recessions in the anterior maxilla, showing its 100% efficiency. Conclusions: The combined use of autogenous platelet plasma and 3D collagen matrix Fibromatrix for the regeneration of soft tissues of the oral cavity is an effective method for treating Miller Class I gingival recession.

PeзюмеВ статье представлены сведения о гигиеническом состоянии полости рта, состоянии тканей пародонта, уровне гигиенических знаний и о мерах лечебно-профилактических мероприятий у работников нефтехимического производства. Объектом изучения стали 97 работников ЗАО «Опытный завод Нефтехим», подвергающихся в производственных условиях комбинированному действию алифатических, ароматических и хлорированных углеводородов, в возрасте 29-59 лет. Контрольную группу составили 44 работника административно-управленческого аппарата, трудовой процесс которых исключает воздействие факторов производственной среды. Результаты исследований выявили тотальную распространенность заболеваний твердых тканей зубов (99,1 %) и пародонта (100 %) у рабочих ЗАО «Опытный завод Нефтехим», высокую распространенность заболеваний слизистой оболочки полости рта -58,7 %, низкий уровень гигиены полости рта и гигиенических знаний. Очевидна необходимость разработки целенаправленной программы профилактики, включающей комплексную -индивидуальную, профессиональную гигиену полости рта и санитарное просвещение.Ключевые слова: нефтехимическое производство, рабочие, полость рта, уровень гигиенических знаний, пародонтит, стоматологический статус.

Background. Periodontitis is a complex, multifactorial inflammatory disease. The prevalence in the adult population is 80-98%. The onset of the disease and the progression of the inflammatory process is associated with the colonization of the subgingival tooth surface with parodontopathogenic microorganisms. Objectives. The purpose is to study the prevalence of five oral microbes in subgingival plaque samples: Aggregatibacter actinomycetemcomitans (Aa), Porphyromonas gingivalis (Pg), Tannerella forsythia (Tf), Treponema denticola (Td), Prevotella intermedia (Pi) in oil and gas industry employees with chronic periodontitis and identify the presence connection between the clinical manifestations of periodontitis and the microbial profile of periodontal pockets. Methods. The study of periodontal microbiota was carried out in 32 workers in oil and gas industry employees with chronic periodontitis and in 32 patients with chronic periodontitis diagnosed not working in this field. Genomic DNA was extracted and 5 bacterial species were detected using the polymerase chain reaction. Results. Oil and gas industry employees with chronic periodontitis have their own flow peculiarities associated with the systematic influence of production factors. The most prevalent microorganism is Pg (77%), the presence of which is significantly associated with an increase in the depth of the periodontal pocket (PPD), clinical attachment loss (CAL), and an increase in the bleeding on probing (BOP). The pathogenic effect was manifested in the presence of the following microorganisms - the formation of the periodontal pocket in combination of Tf and Td, Tf and Pi, CAL level - Tf and Td, increased BOP index - Pg and Tf. Conclusions. As a result of the study, a connection was established between the red and orange complex bacteria with the clinical signs of chronic periodontitis. There was no significant association between age, smoking and the clinic of chronic periodontitis. Significant impact on the development of inflammatory periodontal diseases in oil and gas industry employees have harmful production factors.

At the end of 2019, an outbreak of a new coronavirus infection occurred in the People's Republic of China with an epicenter in the city of Wuhan [26]. The causative agent was given the temporary name 2019-nCoV. The World Health Organization officially named the infection-COVID-19 on February 11, 2020. The official name of the causative agent of infection SARS-CoV-2, was assigned by the international committee on the taxonomy of viruses [22]. A number of authors have established that the main role is played by receptors of angiotensin converting enzyme 2 (ACE2) in the penetration of the virus into target cells [19]. It is known that the transmission of SARS-CoV-2 occurs more often by airborne droplets during close contact with infected patients [15], as well as through direct contact with infected people and infected objects [17, 18, 20]. For healthcare professionals, SARS-CoV-2 has set tasks related to the rapid diagnosis and provision of medical care to patients. Currently, information on the clinical features, epidemiology, prevention and treatment of this disease is limited [13, 14]. To date, there is a limited amount of literature describing the dental status in patients diagnosed with SARS-CoV-2. Thus, the purpose of this study was to study the state of oral mucosa and substantiate its changes in patients with a laboratory-confirmed diagnosis of SARS-CoV-2 of mild to moderate severity, with or without concomitant oral coinfection. On the other hand, knowledge of the peculiarities of the dental status of Sars-CoV-2 patients and timely rational treatment of diseases of the oral cavity should constitute an important stage in the algorithm for their specialized therapy [2]. The work carried out a comprehensive assessment of the state of the oral cavity and the need for dental treatment in patients with Sars-CoV-2. The conclusions are based on the results of a simple observational clinical study, in which a comparative assessment of dental status indicators was carried out in 40 patients with Sars-CoV-2 and 20 somatically healthy individuals of the same sex and age.