Articular cartilage covers the ends of bones in joints throughout the body. Normal cartilage is smooth allowing easy gliding of the joint. When cartilage is injured, the smooth surface can become rough. On occasion, the cartilage injury exposes the underlying bone. Osteochondral grafting is a method of treating cartilage injuries that expose underlying bone. Osteochondral grafts replace both the articular cartilage on the surface and the underlying bone. The tissue can come from other parts of the patient’s body (called osteochondral autograft) or from a tissue donor (osteochondral allograft). These techniques are commonly used in the knee but can be used in other joints.Photo credit: @dmsiebs