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Background. Hip instability in the form of hip subluxation, regardless of its etiology, leads not only to the formation of excessive pelvic anteversion and lumbar hyperlordosis, but also to the early development of hip osteoarthritis. The lack of information in the world literature on possible changes in sagittal balance parameters in this category of patients after triple pelvic osteotomy requires such studies. Aim of the study is to evaluate the spino-pelvic sagittal balance and the type of vertical posture in children with hip subluxation of different genesis after radical reconstructive intervention in the mid-term follow-up period. Methods. The study is based on the analysis of clinical and X-ray results of 50 patients (50 hip joints) aged 10 to 17 years with hip subluxation operated on between 2018 and 2019. The patients were divided into two groups: group I consisted of 30 patients (30 hip joints) with Crowe type I dysplasia; group II consisted of 20 patients (20 hip joints) with Legg-Calvé-Perthes disease. All children underwent triple pelvic osteotomy. Results. Different approaches to triple pelvic osteotomy in patients with hip instability of various genesis allowed to significantly affect the spino-pelvic sagittal balance and the type of vertical posture. In all patients there was a decrease in the sacral slope value, spino-sacral angle, the magnitude of lumbar lordosis, as well as a change in the sagittal vertical axis value from strongly negative to neutral. Conclusion. Analysis of mid-term results of surgical treatment of children with hip instability in the form of hip subluxation and Legg-Calvé-Perthes disease using 3D modeling and prototyping of individual guides showed that the triple pelvic osteotomy leads to the reduction of both excessive pelvic anteversion and lumbar hyperlordosis, resulting in the transformation of physiologically disadvantageous hyperlordotic type of vertical posture into harmonious one.

Background. The choice of pelvic reconstruction technique in children with developmental dysplasia of the hip (DDH) has been the subject of discussion for many years and is often determined by personal preferences of a surgeon rather than by X-ray anatomical state of the acetabulum. The variants of its anatomy structure have still not been reflected in the available scientific literature. Aim of the study to identify the most typical variants of acetabular deformation in children with varying severity of DDH, based on the X-ray anatomical analysis of structure of the acetabulum. Methods. The study was based on the results of examination of 200 patients (200 hip joints) aged 2 to 4 years (3.10.45) with Tnnis grade II-IV DDH. All patients underwent conventional clinical and radiological examination. The latter consisted of hip radiography in several views and computed tomography. We took the values of acetabular index, the extent of acetabulum arch and the presence or the absence of bone oriel as criteria for determination of the most typical variants of acetabular deformation. Results. X-ray analysis of anatomical structure of the acetabulum in young children with varying severity of DDH revealed 3 most common variants of acetabular deformity: 1 moderate underdevelopment of the acetabulum arch (AI 35), its shortening and the presence of bone oriel; 2 pronounced underdevelopment of the acetabulum arch (AI 35), its shortening and the presence of bone oriel; 3 pronounced underdevelopment of the acetabulum arch (AI 35), its sufficient length and the absence of bone oriel. Conclusion. Suggested supplements to existing Tnnis DDH classification might become basic for choosing the surgical correction technique of the acetabulum in children with different severity of DDH.

Background. The invasiveness of surgical approaches for hip surgeries is primarily determined by the severity of the muscle injury. To date, surgeons use from one to three surgical approaches for osteotomy of the pelvic bones and acetabulum reorientation. An analysis of the scientific literature showed the lack of studies comparing the muscle trauma at different surgical approaches for triple pelvic osteotomy in children. The aim of this study to evaluate the degree of muscle injury during triple pelvic osteotomy through various surgical approaches in patients with developmental dysplasia of the hip (DDH). Methods. The study included 70 patients (70 hip joints) aged 1218 years (15.21.4) with Crowe type I DDH treated between 2020 and 2021. All children were divided into two groups: group I consisted of 35 patients (35 hip joints) who underwent triple pelvic osteotomy using an anterolateral approach, group II 35 patients (35 hip joints) who underwent triple pelvic osteotomy through two approaches (medial and bikini). In addition to standard radiometry of hip joints, pain severity based on the visual analog scale (VAS) and blood markers levels of muscle injury (lactate dehydrogenase, creatine phosphokinase, aspartate aminotransferase and C-reactive protein) were evaluated before and at 3rd and 7th days after surgery. Results. Pain severity assessment by VAS was more pronounced (p0.05) in patients who underwent surgery using an anterolateral access. Values of CPK and C-reactive protein significantly (p0.05) exceeded those in patients who underwent triple pelvic osteotomy through two surgical approaches. The results of the study indicate greater hip muscles trauma during the anterolateral approach for triple pelvic osteotomy. Conslusion. The use of anterior-lateral approach when performing triple pelvic osteotomy in children with Crowe type I DDH causes more (p0.05) muscle tissue trauma compared to two surgical approaches (medial and bikini). This is evidenced by a significant increase of creatine phosphokinase and C-reactive protein, as well as a more severe pain syndrome in the immediate postoperative period.

Background. The appearing of data on cam-type FAI in patients with sequelae of slipped capital femoral epiphysis characterized by mild chronic epiphyseal displacement suggests that along with fixation of the proximal femoral epiphysis, modeling of the head-neck transition and restoration of the femoral offsets using arthroscopic techniques should be performed. Meanwhile, it is well known that after epiphyseal fixation, complete remodeling of the epimetaphysis and, consequently, disappearance of the morphological substrate of potential FAI can occur due to the ongoing enchondral and echondral growth. In this regard, the issue of indications for intraarticular interventions in studied patients remains currently open. The aim of the study was to determine the incidence of FAI in the postoperative period in patients with slipped capital femoral epiphysis characterized by mild chronic epiphyseal displacement, and to estimate the requirement of further surgical treatment. Methods. The results of the examination of 32 patients with mild chronic epiphyseal displacement in the typical posterior inferior direction who underwent cannulated epiphyseal screw fixation were analyzed for the severity of epimetaphysis remodeling and the presence of FAI in the postoperative period. Clinical, radiological, magnetic resonance, and statistical methods were used. Results. At the age of 18-19 years, FAI with pain syndrome in everyday life was found in 9 (28.1%) patients 8 of them did not have even partial remodeling of the femoral component of the joint, another 9 (28.1%) patients did not suffer from pain syndrome in everyday life, but had other clinical, radiological and MR signs of cam-type FAI. Complete or almost complete remodeling of the proximal femoral epimetaphysis occurred in 14 (43.8%) patients. Conclusion. In our opinion, therapeutic and diagnostic arthroscopy of the hip joint for the purpose of modeling the head-neck transition at the age of 18-19 years is indicated for more than one quarter (28.1%) of the investigated patients because of the presence of reliable signs of FAI.