## 1 Introduction  
Orthodontics is a dynamically developing field of dentistry, used not only to improve the aesthetics of the bite but also to correct serious defects of the masticatory system that disturb its functions [1, 2, 3]. According to the American Association of Orthodontists (AAO), 50% of people have malocclusions that qualify for orthodontic correction, of which 10% are cases that require medical intervention [4, 5, 6]. According to the WHO, malocclusion is one of the three most important dental diseases, right after periodontitis and caries. Estimates of its prevalence range from 39% to 93% in children and adolescents [7, 8]. Malocclusions were classified by [PERSON] and divided into four classes (normal bite, class I, class II, and class III) based on the relationship between the position of the upper and lower first molars. Malocclusion is not only a cosmetic defect but also, according to the position of the World Dental Federation (FDI), may affect oral health and contribute to an increase in the incidence of tooth decay, periodontitis, risk of injuries, and difficulties in chewing, swallowing, breathing, and speaking, which emphasizes the importance of developing orthodontics as an integral part of dentistry [9, 10]. One type of orthodontic compliance widely used in orthodontics are TSADs--temporary skeletal anchorage devices. The main advantage of this type of device is the possibility of mounting to the palatal bone or alveolar ridges, most often using mini-plates and mini-screws, which ensures stable anchoring without the need to use a rest for the premolars and molars, which in turn could lead to their undesirable displacement. TSAD is often used in the en mas teeth after premolar extraction in the treatment of bimaxillary protrusion. Thanks to this method, controlled and relatively quick alignment of the front teeth is possible [11; 12; 13; 14; 15; 16]. One of the developed treatment strategies using TSAD is BOS--Biocreative Orthodontic Strategy, the main goal of which is to correct malocclusions with the least possible interference in the physiological functions of the masticatory system. It assumes personalized adjustment of therapy and appropriate orthodontic appliances to the patient's age, anatomical differences, and personal preferences. It is important that during treatment, among others, bimaxillary protrusion does not lead to a change in the location of the posterior teeth; therefore, partially osseointegrable C mini-implants are preferred as anchoring devices. BOS is a holistic strategy for the treatment of malocclusions with great potential and effectiveness [17; 18; 19; 20; 21; 22]. Imaging diagnostics plays an important role in the modern diagnosis of malocclusion. In recent years, diagnostic methods that allow 3D imaging of structures have become increasingly important. Such techniques include the following: computed tomography (CT), cone beam computed tomography (CBCT), computer-aided design/computer-aided manufacturing (CAD/CAM), micro computed tomography (MCT), 3D laser scanning, structured light technology, stereophotogrammetry or systems 3D surface imaging (3 dMD), 3D facial morphometry (3 DFM), adjustable aperture computed tomography (TACT), and magnetic resonance imaging (MRI) [23; 24; 25; 26]. In dentistry and orthodontics, CBCT cone beam computed tomography is preferred because it allows precise imaging of a given part of the facial skull with several times less X-ray radiation than in the case of classic CT, which is important especially in the pediatric population. Other advantages of CBCT include the short duration of the examination and relatively low cost [27; 28; 29; 30; 31; 32; 33]. The main difficulty associated with performing the examination in children is the frequent acquisition of images distorted by artifacts resulting from head movement. To minimize the occurrence of this problem, it is considered to perform the examination in a position as comfortable as possible for the child with gentle stabilization of the head.