ИСТИНА

Introduction: Endoprosthetics of the hip joint allows provide early activation of the patient, in the first days after the surgery, to begin functional and psycho-social rehabilitation in the hospital, achieve good cosmetic and functional results, continue conservative treatment, on time. Methods: The study included 172 patients with primary bone sarcomas, metastatic lesions, benign bone tumors, who from March 1996 to December 2019 performed 194 primary and revision operations. In the study group of patients, 47.1% were diagnosed with a primary malignant tumor, 37.8% had metastatic lesion. The mean follow-up period was 80.87 months. The leading complication at the time of the endoprosthetics was late aseptic instability (Type IIB — 37.5%). Results: Aseptic instability is the leading complication in the postoperative period 6.2%. Changes in the technology of primary and revision hip arthroplasty, a qualitative change in the implanted materials, made it possible to reduce the number of aseptic loosening of the endoprosthesis in the interval from 2008 to 2018 (11 years) by more than 2 times to 4.5%, compared to the previous 11 years interval from 1996 to 2007, where the frequency of aseptic instability reached 9.8%. Primary and revision endoprosthetics survival after 5 years was 91.9%, after 10 years was 81.3%, after 15 years was 76.5%, after 20 years was 68% of patients. The average functional result on the MSTS scale after 6 months after primary and revision endoprosthetics was 72.6%, after 12 months 84.2%. Conclusion: The introduction of innovative technological solutions in the design, materials of the endoprosthesis, will become a means of ensuring a further progressive decrease in the frequency of complications and increase the life of the implant.