Fracture is divided into fresh fracture and old fracture, fresh fracture generally refers to a relatively short time of injury, within 2-3 weeks of the fracture, and old fracture refers to a longer time of injury, generally more than 2-3 weeks. However, this fresh and old fracture cannot be mechanically distinguished according to time, but should be treated differently according to the patient’s age, the site of the fracture and the type of fracture, for example, a child’s green branch fracture has reached healing in about two weeks, so it certainly cannot be called an old fracture after two weeks. In elderly people, although the femoral neck fracture is 3 weeks old, it does not show any signs of healing, and this must be more than 3 weeks to be called an old fracture, because the healing cycle of fractures in elderly people is about 24 weeks.