The aim of this observational study is to determine content of rare metals and other elements, along with the levels of selected immunological parameters, in the tissue of the hip or knee joint in the course of degenerative diseases. Determining potential disturbances in the levels or functions of these parameters may in the future contribute to improving treatment - for example, through supplementation of deficient metals or modulation at the immunological level. The main question it aims to answer is:
Are selected rare metals, trace elements and other selected immunological parameters lowered in the tissue of the hip or knee joint as well as in serum in the course of osteoarthritis?