A graduate of the Poznan University Academy of Medical Sciences. In 1964 he passed his doctoral dissertation, and in 2000 his habilitation. A specialist in orthopedics and traumatology. Prof. Trzaska is mainly interested in the reconstruction of ligaments of the knee, hip dysplasia knee reconstruction operations, and the use of biomaterials in knee surgery. Prof. Trzaska is head of the Department of Sports Traumatology at the Department of Sports Medicine, in the Academy of Physical Education in Poznan, an Orthopedics and Traumatology Consultant in the J. Strusia Hospital in Poznan, an Orthopedics and Traumatology Consultant in the Śrem Hospital. Professor T. Trzaska is a member of the Polish Society of Orthopaedics and Traumatology, chairman of Knee Surgery, Arthroscopy and Sports Traumatology Unit, member of the Polish Arthroscopy Society, Polish Society of Biomaterials, Polish Society of Sports Medicine, the European Unit of Knee and Arthroscopy Surgery, and also the International Cartilage Repair Society – ICRS.