Stem cells are a special type of cell that is capable of multiplying and transforming into other cells. It is assumed that stem cells contained in various tissues of the body, such as bone marrow, adipose tissue, umbilical cord, etc., repair damaged cartilage tissue by generating new cells. In addition, stem cells prevent cartilage damage by secreting certain substances. Thanks to this method, the restoration of the damaged area and the reduction of patient complaints are observed: a reduction in pain complaints, an increase in joint mobility and the restoration of health sufficient to return to the usual way of life.