Osteoarthritis arising from cartilage degeneration is the most common cause of joint pain. However, the relationship between joint pain and cartilage degeneration is not well understood.
Department of Orthopaedic Surgery, Asahikawa Medical College, Midorigaoka-Higashi 2-1-1-1, Hokkaido, Asahikawa 178-8510, Japan. meguru.o@fine.ocn.ne.jp