The healing process usually takes two months from the formation of the bone scab. The fracture healing is divided into three periods: First, about two weeks after the fracture belongs to the period of hematoma mechanization and evolution, which is mainly to mechanize and dissipate the local bleeding and inflammatory reaction, providing favorable conditions for the growth of the fracture and the growth of the bone scab. Second, the original bone scab formation period is two weeks or more after the fracture begins to form a bone scab, fracture ends have bone tissue for connection, this time will last for about two months, from the formation of bone scab to the final fracture healing time of two months. After the fracture is healed, the local bone scab is reshaped and reverted to the normal bone tissue, which means that the fracture is firmly healed.