Objectives:
The defects of articular cartilage are an all too commonly encountered medical problem in bone and joint surgery,which may be caused by trauma or evolve during the course of diseases such as osteoarthritis,osteochondritis and osteonecrosis.Articular cartilage has a limited capality to repair spontaneously after injury. The large defects at articular cartilage are often repaired by fibrocartilage rather than normal hyaline cartilage. The resulting fibrocartilage are different from hyali...