Aim: increasing the effectiveness of diagnosis and further orthodontic-surgical treatment of various clinical forms of hyperdontia (supernumerary teeth) and preventing recurrence with the use of cone-ray computer tomography data in orthodontic practice.Materials and methods. The clinical case of patient (born in 2004) treatment is presented, with severe hyperdontia and retention of teeth that had little effect on the formation of the general configuration of occlusion. The patient's examination and treatment was carried out with the assistance of clinical, anthropometric and radiological data. The clinical method was to examine the patient and formulate a plan for further orthodontic therapy. The radiological method consisted of data analysis of cefalometry by Bjork, Steiner using a computer program and conducting a survey using a cone-ray computer tomography, followed by the use of these data in diagnosis and orthodontic treatment.Results. Following the clinical and radiological methods of examination and subsequent orthodontic surgery, the corresponding end results were obtained:1. The localization and topography of supernumerary teeth as the causes of relapse of pathology with the help of data obtained with the help of CBCT.2. Radiographic picture reflected on the sagital and axial re-formats of tomograms for the diagnosis of supernumerary teeth, is more informative than diagnostics by standard diagnostic protocols.3. After analysis of the study data, a more meaningful protocol of surgical intervention is prescribed.4. Implementation of the results of modern diagnostics significantly influenced on the final result of orthodontic treatment.Conclusions. Thus, in the process of corresponding work installed:– the availability of computer tomography data is crucial for objective and qualitative diagnosis and treatment of hypertension.– the general level of diagnostics during the intervention is significantly increased.