In clinical practice, a broken bone is a fracture that occurs. After a fracture occurs, most fractures can heal with proper treatment. The reason for healing is the presence of osteoblasts and osteoclasts within the periosteum, and it is the osteoblasts that are responsible for fracture healing. Because osteoblasts exist within the periosteum, most fractures will heal as long as the fracture does not cause significant damage to the periosteum at the time of the fracture. If the periosteum is more damaged and the osteoblasts are more damaged, fracture healing will be delayed. There is also a case of cartilage fracture, because cartilage osteoblasts are fewer and the circulation of cartilage itself is poor, the healing ability of cartilage is very poor after cartilage fracture, and most of the healing is difficult.