Abstract. A wide range of scientific research is being carried out in the world to predict and detect early manifestations of caries in children during orthodontic treatment, as well as to optimize the effectiveness of diagnostic and treatment-and-prophylactic measures, existing diagnostic methods are already insufficient, there is an urgent need for additional research methods. From these positions, it seems promising to study diagnostic and therapeutic measures aimed at improving the quality indicators of orthodontic care for children. The development of the closest possible approach to the diagnosis and treatment of caries during orthodontic treatment in the early stages will help to obtain a stable aesthetic outcome in the treatment of orthodontic patients, and to avoid relapses. In modem orthodontic dentistry acute problem of prevention of dental caries and periodontal diseases, especially in children and adolescents who have not yet completed the process of mineralization of hard tissues: soon after teething create a situation of increased risk of tooth decay. The purpose of this paper is to analyze complex information about methods of prevention of dental caries in patients with removable and non-removable orthodontic appliances.