War has a negative impact not only on human mental health, but also manifests itself in an increase in the frequency and prevalence of pathology of organs and body systems, including the dentofacial system. One of the factors influencing the progressive growth of periodontal diseases is a high level of psychoemotional stress. Despite the large number of studies on stress, its role in the genesis of dental diseases has not been sufficiently studied. Therefore, the study of the relationship between psychoemotional state and periodontal diseases in military personnel of the Armed Forces of Ukraine is a timely and relevant subject of research. The aim of the study – To evaluate the state of periodontal tissues in military personnel of the Armed Forces of Ukraine with inflammatory and dystrophic-inflammatory diseases depending on their stress resistance and level of reactive anxiety. Materials and methods. Dental examination of military personnel of the Ukrainian Armed Forces was conducted on the basis of the Department of Pediatric Dentistry of I. Gorbachevsky TNMU. On the basis of periodontal indices (PMA, PBI, PI, PSR) the state of periodontal tissues was evaluated in 22 military personnel with chronic catarrhal gingivitis, 42 military personnel with generalized periodontitis of the initial – I degree and 36 military personnel with GP of the II degree (main group), which were divided into 4 groups according to their stress resistance and level of reactive anxiety: Group I very high stress tolerance with low level of reactive anxiety; Group II high level of stress tolerance with low level of reactive anxiety; Group III threshold level of stress tolerance with moderate level of reactive anxiety; Group IV low level of stress tolerance with high level of reactive anxiety. The obtained results were compared with the data of 37 patients of civilian specialties with periodontal diseases (comparison group). Results and discussion. As a result of the studies, it was found that in military personnel of the Ukrainian Armed Forces (main group), with an increase in psychoemotional stress, the values of periodontal indices increased, which, on average, were higher in CCG: PMA – 1,6 times, PBI – 2,0 times, PSR – 1,5 times, p<0.01; in initially I degree GP: PMA – by 1,4 times, PBI – by 2,1 times, PI – by 1,7 times, PSR – by 1,8 times; in grade II GP: PMA – by 1,5 times, PBI – by 1,4 times, PI – by 1,6 times, PSR – by 1,3 times, p<0.01, compared to similar values in the comparison group. Conclusions. Thus, as a result of the research it was found that in military patients of the Armed Forces of Ukraine with increasing psychoemotional stress the state of periodontal tissues significantly deteriorated, which was confirmed by an increase in periodontal indices, indicating the need for comprehensive treatment of the initial II degree of GP.