Summary. In this literature review, a systematic analysis of modern data on the study of complications of unicompartmental arthroplasty of the knee, their prevalence, the main methods of treatment and prevention. Instability of the components of the endoprosthesis, wear of the polyethylene and progression of the degenerative process in the contralateral joint were found to have the highest frequency in the structure of complications. Additional factors for the development of negative effects of unicompartimental arthroplasty of the knee are local osteoporosis of the femur and tibia, periprosthetic fractures, infectious complications and pain syndrome.

Considering the high frequency of degenerative-dystrophic diseases of the joints and the constant growth of morbidity, the improvement of treatment conservative approaches is an urgent task of modern medicine. Background: to evaluate the effectiveness of using Artro-Patch (3 % hyaluronic acid solution, 3 ml) in patients with stage II knee osteoarthritis and the need to perform preliminary aspiration of arthritic fluid before intraarticular injection. Materials and methods. 60 patients with stage II knee osteoarthritis who were treated with the use of Artro-Patch (3 % hyaluronic acid solution, 3 ml) were examined. The average age is 45.56 ± 8.61 years. The group includes 38 (63.33 %) women and 22 (36.67 %) men. Among them 2 groups were formed. Patients of group 1 (n = 30) received intra-articular injection of Artro-Patch. Patients of group 2 (n = 30) were injected with Artro-Patch with prior aspiration of arthritic synovial fluid. Clinical outcomes were assessed using the WOMAC questionnaire at admission, 30 days, and 90 days after the procedure. The StatSoft STATISTICA 13 program was used for statistical analysis. The probability of an error-free forecast was set at p < 0.05. Results. As a result of using Artro-Patch in patients with stage II knee osteoarthritis, it was possible to achieve a reliable improvement of all clinical indicators determined by the WOMAC questionnaire. It has been proven that performing a preliminary aspira-tion of arthritic fluid before intra-articular injection of Artro-Patch leads to the development of a more stable and better clinical result at 30 days, with subsequent positive dynamics up to 90 days of observation. Conclusions. Thus, the high effectiveness of using Artro-Patch drug in the treatment of stage II knee osteoarthritis has been proven. To achieve a stable and better clinical result, it is recommended to perform a preliminary aspiration of arthritic fluid before intra-articular injection of the drug.

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Summary. In 67-72% of patients with gonarthrosis, there is an angular deviation of the tibia towards the lesion. Prolonged functioning in such conditions is accompanied by patellofemoral arthrosis, in the development of which we found patterns during unicompartmental arthroplasty of the knee joint. Materials and Methods. This publication is based on the materials of a clinical and radiological examination of 106 patients with angular deviation of the tibia who were operated on using the method of unicompartmental arthroplasty. Conclusions. The degree of patellofemoral osteoarthritis is directly dependent on the duration of the disease and the magnitude of the angular deviation of the tibia. The most degenerative-dystrophic changes occur in the knee facet and the central facet, which are displaced in the projection of the patellofemoral joint, where cartilage degeneration, subchondral sclerosis with foci of bone destruction, pronounced marginal bone growths, and exostoses progress.