The normal adult fracture will have bone scab formation in about 4 weeks, so 2 months under normal circumstances bone scab is definitely formed. There are several factors: 1. the fracture was not operated at that time, and the fracture was disconnected and separated by manual repositioning, so the bone scab could not be formed. 2. the surgery was done with a plate or a kerfing needle, and internal fixation was done, but the surgery was not effective, so the fracture ends were too far apart, and the alignment was not good, which also caused the bone scab not to form. In this case, we have to intervene again surgically to cut the fracture site and adjust the position of the two fracture ends so that the two fracture ends are as close to each other as possible, so that the scabs may be formed.