Staff of "Orthopaedics, traumatology and prosthetics" 2025. To the 100th anniversary of Professor Yuri Yuliyovych Kollontai — memory of the teacher (1925–2025). ORTHOPAEDICS TRAUMATOLOGY and PROSTHETICS. 2 (Jun. 2025), 111. DOI:https://doi.org/10.15674/0030-598720252111.