COMPARISON OF THE STRENGTH OF THE DESIGN OF THE MOBILITY UNIT OF THE HIP JOINT ENDOPROSTHESIS WITH MONOLITHIC AND NON-MONOLITHIC USB CARBOSITALL

Background. The relevance of the topic is due to the need for a friction pair for hip replacement, which could ensure longer functioning without the need for revision operations. The purpose of the work is a comparison of the strength of the design of the head and liner of the hip joint endoprosthesis with a friction pair made of monolithic and non-monolithic USB carbositall. Materials and methods. The computer model of the hip joint is based on the finite element method. To assess the strength, the P.P. Balandin criterion was used. Results. The developed computer models made it possible to evaluate the strength of various designs of the head and liner of the hip joint endoprosthesis. Evaluation of the obtained stress data revealed insufficient strength of the design of the mobility unit of the hip joint endoprosthesis with non-monolithic USB carbositall. The design of the endoprosthesis with monolithic USB carbositall has a safety margin of 4.5. Conclusions. The design of the head and liner using monolithic components of USB carbositall makes it possible to provide a sufficient margin of safety for the mobility unit for use in hip arthroplasty.