The normal fracture can work only after 8-12 weeks, because there are 3 phases of repair after the fracture occurs, the first phase is called the hematoma mechanization phase, that is, the hematoma is formed by bleeding from the fracture end, and the hematoma gradually mechanizes to form fibrous bone scabs, that is, granulation tissue, these scabs are soft and need further calcium salt deposition before they can become hard bone scabs, so 1-2 weeks is the hematoma mechanization phase. 3-5 weeks is the fibrous bone scab formation phase. The osteoblasts of the periosteum then produce bone scabs, the outer ones forming the outer scabs and the inner ones forming the inner scabs, and clinical healing is achieved when the inner and outer scabs are continuous. Next, the bone scab will be shaped by the body to return to the normal shape of the bone, which is called the scab remodeling period. 8-12 weeks or 2 months are required for complete healing and return to normal work.