Figure 2From: Large animal models in experimental knee sports surgery: focus on clinical translation Classification of cartilage defects. Both partial- and full-thickness chondral defects involve, by definition, only the cartilage layer. Osteochondral defects extend through the subchondral bone plate into the subchondral bone. Light blue: articular cartilage; dark blue: calcified cartilage; dark orange: subchondral bone plate; orange: subarticular spongiosa.Back to article page