Background. Since there is no national arthroplasty registry in the Russian Federation, the exact number of arthroplasty operations performed is unknown. Aim of the study to evaluate the epidemiology of primary, revision hip and knee arthroplasty and periprosthetic joint infection in Russian Federation. Materials and Methods. The inquires were made to 85 subjects, 73 federal state budget institutions and 30 private hospitals. Results. Answers were received from 76 subjects of Russian Federation, 41 federal and 18 private hospitals. The studied indicators revealed to be pretty much heterogenic. The decrease of operations number from 20% to 40% in subjects of Russian Federation due to SARS-CoV-2 pandemic forced us to make no analysis for these 2020 indicators in Russian Federation generally. 147 061 primary hip and knee arthroplasties were performed in 2019 in Russian Federaion. 7 770 revison hip and knee arthroplasties were done. 6 606 cases of severe orthopaedic implant-assosiated infection were cured including 4 282 cases post hip and knee arthroplasties that constitutes 2,91 % from primary arthroplasties. Conclusions. The frequency of periprosthetic joint infection in Russian Federation correlates to the world data. High complexity for patients routing with implant-assosiated infection and strong demand for Federal Center of implant-assosiated orthopaedic infection are revealed.

This publication is the official report describing all total hip arthroplasty procedures registered in the database from 01.01.2007 to 31.12.2020. During this period, 74762 operations were performed: 67019 (89.64%) primary and 7743 (10.36%) revision. The proportion of males and females underwent primary arthroplasty was 41.1% and 59.0%, respectively. The age of patients with primary arthroplasty was 57.8 years (95% CI from 57.7 to 57.9), with revision 59.3 years (95% CI from 59.0 to 59.6). The absolute number of primary hip arthroplasty procedures added into the database increased annually from 2007 to 2012. Since 2015, there has been a trend towards a decrease in the number of hip arthroplasty, due to the more intensive growth in the number of knee replacements performed. The number of revision hip arthroplasty operations varies from year to year with a clear tendency to increase, except 2020. The large proportion of revisions are accounted for by early revisions performed in the first years after primary hip arthroplasty, as well as early re-revisions. The main types of implants fixation on primary arthroplasty during the reporting period were cementless (50.89%) and hybrid (32.33%). In patients of older age groups, there is a significant decrease in the proportion of cementless fixation, while the proportion of hybrid, reverse hybrid and cemented structures is increasing. There are significant fluctuations in the ratio of different types of implants fixation in different years.

Patellar resurfacing is one of the unsolved problems of knee arthroplasty due to the high frequency of patella-femoral complications. In the present analytical review the authors traced the evolution of patellar resurfacing, analyzed the literature on the etiology of anterior knee pain and patellar biomechanics, discussed the indications for replacement or preservation the patella.