Background. Oral microbiome actively affects the child’s health and is an available tool for diagnosing and predicting dental and systemic diseases. Studying the colonization of the oral cavity by cariogenic and periodontopathogenic bacteria, given the congenital, genetically determined decrease in the quality of collagen in children with osteogenesis imperfecta, is an urgent problem. The purpose of the study was to determine the level of cariogenic and periodontopathogenic microorganisms in the oral cavity of children with osteogenesis imperfecta. Materials and methods. Clinical studies were conducted with the participation of children aged 2 to 17 years diagnosed with osteogenesis imperfecta, in whom the level of contamination of the oral cavity with cariogenic bacteria Streptococcus mutans and Lactobacter spp. and periodontal pathogens Porphyromonas gingivalis, Actinobacillus actinomycetemcomitans, Treponema denticola, Bacteroides forsythus, Prevotella intermedia was determined. Results. All children with osteogenesis imperfecta were found to have a borderline high level of Streptococcus mutans contamination and the presence of periodontal pathogens of the first order, mainly in the form of monocultures in preclinical concentration, which, against the background of low collagen quality, indicates a sufficiently high risk of developing caries and periodontal diseases.
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