Because of the relative avascularity of articular cartilage, lesions that are caused by trauma or degeneration of the cartilage do not heal spontaneously and must be repaired surgically.

• 该文称：由于关节软骨相对缺血管，所以因创伤或关节软骨蜕变导致的软骨病损不会自动愈合，而必须采用外科手段进行修复。