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The paper presents the results of a study of the effect of ecotoxicants on the state of dental status and local immunity in the oral cavity in 100 adolescents (14–16 years old) permanently residing in the Industrial District of the city in whose territory there are enterprises of heavy metallurgy. The control group consisted of 44 adolescents of the same age, from an environmentally friendly area. Hygienic indices, the state of hard tissues of teeth and periodontal, the presence of dentofacial anomalies were investigated. To determine the level of resistant activity of the oral cavity, the content of immunoglobulin A (IgA) of blood and secretory immunoglobulin A (sIgA) saliva were determined in 37 in the main and 44 adolescents of the control group. According to the data obtained, adolescents exposed to environmental stress revealed an unsatisfactory level of oral hygiene, increased dental morbidity and changes in the content of secretory immunoglobulin. According to the study, the average sIgA levels in adolescents with periodontal pathology from an environmentally unfavorable area corresponded to the lower limit of reference values and were significantly reduced relative to its elevated values in inflammatory periodontal diseases in the

Dental Status and Specific Immunity of the Oral Cavity in Adolescents Living In Ecologically Unfavorable Areas