Relevance. Currently, dysplastic coxarthrosis firmly occupies the second place in the structure of degenerative-dystrophic diseases of the hip joint[1,3]. The incidence of pathology according to various data ranges from 25 % to 77 %. Dysplastic coxarthrosis (DCA) is one of the most severe consequences of hip diseases such as dysplasia, congenital hip dislocation, Legg-CalvePerthes disease, coxa-vara, etc. According to the literature, degenerative processes in the hip joints lead to a decrease in the working capacity of patients in 60-70% of cases, and to their disability-in 11-38%, and these indicators have acquired a steady upward trend in recent years [4,5]. At the moment, the main method of treatment of pathology is recognized as total endoprosthesis, which allows to relieve patients from severe pain syndrome in the shortest possible time and improve their social adaptation [6]. However, an important point of endoprosthesis is that the pathological anatomical relationships in dysplastic coxarthrosis require a differentiated approach to the implantation of endoprosthesis components [4,6,7,8]. When hip arthroplasty, despite improvements in technology surgery, quality materials for the manufacture of implants and their design, frequency of aseptic instability of the prosthesis is quite high.