In this seminar, Dr. Hossein Arjamand presented his lecture on the treatment and control of pain in severe wear and tear of the knee joint with the help of knee nerve block. In this seminar, there were participants from different fields such as physical medicine and rehabilitation, orthopedics, rheumatology. The financial supporter of the seminar, Life Cell Company, presented its latest achievements in the field of treating muscle and skeletal diseases with the help of stem cells.