Articular cartilage is a layer of transparent cartilage or fibrocartilage on the surface of the joint connecting bones. Articular cartilage exists in the middle of every healthy joint, and there is no direct connection between cortical bone and cortical bone in the joint. Cortical bone is covered with a layer of cartilage on the surface, and the cartilage slides relatively smoothly in the middle of the joint. Cartilage also secretes joint fluid to promote lubrication. Cartilage also has elasticity to reduce the impact load on the joint. If the articular cartilage wears away, osteoarthritis can develop. Articular cartilage is not only smooth, but also elastic to maximize stress absorption and cushioning. The absorption of force is reduced after articular cartilage damage, and joint damage and degeneration can be aggravated. Therefore, articular cartilage is important for human health, and it is important to prevent cartilage arthritis, and any damage needs to be treated promptly.