Background. Significant results have been achieved through the use of hybrid and transpedicular metal structures. However, when spinal systems are implanted during surgery in patients with severe forms and idiopathic scoliosis, a number of limitations arise. Not only the performance of corrective maneuvers during the operation but also the creation of mobility on the top of the main arc accompany the strategies of surgical treatment. Traditionally, mobilizing discectomy at the top of the spark is performed in patients with idiopathic scoliosis. Pedicle subtractional vertebrotomy and Ponte and Smith-Petersen osteotomy are most common in neuromuscular scoliosis and spinal deformity, with a predominance of the kyphotic component. Problems with correction of extremely low and neglected forms and idiopathic scoliosis in children remain. Aim. The present study aimed to provide a comparative analysis between using transpedicular spinal systems alone and in combination with a wedge osteotomy of the apical vertebra to correct spinal deformity in children with extremely severe right-sided idiopathic thoracic scoliosis. Materials and methods. The surgical treatment results of 20 children 15 to 17 years old with extremely severe forms of right-sided idiopathic thoracic kyphoscoliosis were included in the analysis. All patients underwent standard preoperative examination, including radiology, computed tomography, magnetic resonance imaging, and neurophysiological studies. The patients were divided into two groups according to the method used during the second stage of surgical treatment correction of deformity with the transpedicular system (1) alone or (2) in combination with a wedge osteotomy of the apical vertebra. Results. Patients from the first group showed an amount of scoliotic and kyphotic component correction ranging from 25% to 62% and from 21% to 56%, respectively. In patients from the second group, who underwent additional wedge osteotomy of the apical vertebrae during the operation, correction of the scoliotic and kyphotic components ranged from 36% to 74% and from 50% to 70%, respectively. Conclusion. In children with idiopathic thoracic kyphoscoliosis, performing a wedge corpectomy of the apical vertebral body is an effective additional mobilizing component, which allows achieving significant correction of both scoliotic and kyphotic curve components, restoring the physiological profile of the spine and body balance during the surgical intervention, and maintaining the achieved result during the long-term observation period.

Background. One of the most common vertebral malformations that lead to the occurrence and progression of congenital scoliosis is disorders of vertebral formation. Most specialists adhere to the active tactics of surgical correction of spinal deformity in early childhood. The aim. To evaluate the variants and causes of the transpedicular spinal system destabilization, which is not related to the violation of its integrity, in the surgical treatment of children with congenital spinal deformities. Materials and methods. The case histories of 286 children under the age of 6 years undergoing surgical treatment in H. Turner National Medical Research Center for Сhildrens Orthopedics and Trauma Surgery between 2014 and 2019 were analyzed. Depending on the outcome of the surgical treatment, the patients were divided into groups: the main group (n = 7) included those with spinal system destabilization and the control group (n = 12) consisted of those without spinal system destabilization. During the study, the sizes of the bases of the arcs adjacent to the abnormal vertebra, the magnitude of the scoliotic and kyphotic components of the deformation, and the correct position of the supporting elements of the spinal system on the Gertzbein scale were determined. Results. Patients of the studied groups were identified according to their age and the magnitude of scoliotic and kyphotic components of spinal deformity. The average diameter of the arc base in the studied groups varied (p 0.05). In all patients, the complete correction of the congenital curvature of the spine was achieved after surgery. In the long-term postoperative period in patients of the study group after radiation analysis, the malposition of supporting elements relative to the base of the vertebral arch and a loss of correction of spinal deformity by an average of 25 were revealed, which required the repeated surgery in order to restore the stability of the spinal system and to correct deformation. Conclusions. The reasons for the spinal system destabilization during the correction of the spinal congenital deformations are the peculiarities of vertebral anatomical-anthropometric parameters in the curvature zone, as well as tactical aspects during surgery. The main reason for the spinal system destabilization without violating its integrity is the small size of bases of adjacent vertebral arches relative to the abnormal one. The small size of the bases of the vertebral arches and the significant amount of necessary correction of congenital spinal deformity necessitate the installation of a longer spinal system in order to restore physiological profiles in the curvature zone.