Postcovid distant complications in periodontal tissues in individuals after inpatient treatment in the red zone

Abstract

There are no data in the literature on long-term complications in periodontal tissues due to a coronavirus infection. The aim is to study postcovid complications arising in periodontal tissues in patients with general somatic pathology. >. At the first stage, 296 patients were examined who were treated in hospitals for COVID-19 and 128 people — the comparison group — without concomitant pathology, who were divided into 6 age groups. The examination included measuring the microcirculation index (MI) and determining the degree of oxygenation in periodontal tissues according to Laser Doppler Flowmetry (LDF) data. At the second stage, the same indicators were determined in 74 patients with complications after COVID-19 in the form of periodontitis, and an index evaluation of periodontal tissues was also performed: periodontal index (PI). The severity of periodontal pathology and the period of its occurrence were assessed depending on the age of patients, the effect of postcovid vasculitis on the state of the microcirculatory bed and the nature of the course of pathological processes in the periodontal. Dopplerograms revealed predictors of the development of severe periodontal pathology. >. The integral microcirculation index and the level of oxygenation in the periodontium and on the phalanx of the finger in patients with COVID-19 undergoing inpatient treatment were statistically significantly lower than in patients of control groups. Against the background of improved microcirculation and oxygenation of periodontal tissues by 3 months after coronavirus infection, there is a decrease in PMA and PI indices. By the 6th and even more than the 9th month, the examined patients showed a drop in the indicators of regional blood flow and the level of tissue saturation against the background of an increase in the indices of PMA and PI. >. The greatest number of pathological processes in periodontal tissues occurred in the period from 6 to 9 months, the most pronounced in the age group of 65—80 years — 43.1%, 55—64 years — 41.3%, 45—54 years — in 31.3% of patients. In patients with severe hemorrhagic vasculitis (1.1%), the most pronounced changes in periodontal tissues were observed. In this category of patients, 3 months after the infection, there was a sharp development of rapidly progressive periodontopathy, and by the 9th month there was a complete loss of teeth. The severe form of hemorrhagic vasculitis was characterized by severe microcirculation disorders in periodontal tissues (PM=16.1±0.9).The indicators of microcirculation (PM) below 17.1 and hemoglobin oxygen saturation (SO2) below 77.9 are predictors of the development of inflammatory changes in periodontal tissues.