## 6 Discussion  
The aim of this paper was to present a case of a nine-year-old patient with a maxillary cyst-like lesion to exemplify the role of a well-planned interdisciplinary treatment sup  
Figure 12: Upper occlusal photograph 9 months after surgery (**a**) and during orthodontic treatment (**b**). Figure 13: Treatment progress. ported by a thorough analysis of radiological records. Screening and diagnostic strategy depend on the size of the lesion and the patient's age. In mixed dentition, the period when the cyst is associated with an unerupted tooth, the treatment of choice should be minimally invasive to preserve the germ and create favorable conditions for its further development and appearance in the oral cavity. Developmental age requires a different approach in comparison to adult patients because an intervention should not disturb the growth of the stomatognathic system. Due to the harmful effect of ionizing radiation, the objective of numerous studies has been to find an alternative that could decrease the need for X-ray exposure. In some maxillofacial pathologies, such as rhinosinusitis, researchers have confirmed that USG can be a fast, safe and efficient screening method [30]. Thus, the use of ultrasonography as a scientifically proven diagnostic tool for odontogenic cysts still requires further investigation. The comparison of USG pictures with clinical, radiological and histopathological findings presented in previous research is promising [31; 32]. However, with respect to bone disturbances, achieving a similar sensitivity and specification as CBCT is impossible when the cortical bone is thick and intact. X-rays still remain the gold standard in the diagnostic protocol [33]. An important aspect is a well-judged referral for radiological examination. According to ADA recommendations for limiting radiation exposure [33], X-rays are permitted in the orthodontic diagnostic process, provided that the as low as reasonably achievable (ALARA) principle according to the patient's exposure is respected. ADA allows taking panoramic X-rays in children with primary and mixed dentition to evaluate general dentofacial growth and development. Additionally, the specific indications that can be observed in orthodontic practice are presented, such as tooth malposition or impaction, swelling or facial asymmetry, abnormal growth and unexplained absence of teeth or ectopic eruption [33]. Although there are no clear guidelines according to radiological diagnosis in new orthodontic patients, in this paper, the suggested algorithm (including the suspicion of a cyst-like lesion) is presented in Figure 14 [9; 34]. The presented case emphasizes the significance of routine orthodontic screening in the detection of odontogenic cyst-like lesions. Prompt preliminary diagnosis and referral to the surgery department allowed starting the treatment in the best possible developmental period and resulted in the successful eruption of affected teeth. The ability of teeth to erupt is correlated with root formation, with onset after 2/3 of the root length is formed [35]. An unerupted tooth with an open apex associated with a cyst also has the potential to appear spontaneously in the oral cavity after the marsupialization procedure [35; 36]. The reduction of intracystic pressure performed at this stage of tooth development increases the chances of tooth eruption. [PERSON] et al. [36] radiologically assessed the eruption of the lower second premolars associated with a follicular cyst. The rate of eruption was correlated with the gradually decreasing size of the lesion and accelerated rapidly in the first three months after marsupialization. This process coexisted with intensive bone regeneration in the disturbed area, as well as with the promising change of tooth germ inclination. Thus, radiological findings lead to another important piece of information: the development of the root is continued even if the tooth coexists with an enlarging lesion.