The chondral defect might be accompanied by bone reduction, resulting in an osteochondral defect. Along with the symptoms of knee osteoarthritis, the detached fragment may be a loose entire body and may possibly induce locking in the knee joint.  (OCD), a problem where a piece in the cartilage as well https://www.theorthopaedicandpainpractice.com/what-are-cartilage-lesions/