Whether or not the fracture line is blurred is determined by the time and location of the patient’s disease, with attention to the following aspects: 1. After the patient’s fracture is treated by external fixation, internal fixation or surgery, the patient is found to have blurred bone scabs by X-ray examination after 1 year of treatment, and it is clearly understood through 3D CT examination that the injury site is not healed or less healed, and there are related symptoms, which can be diagnosed as bone discontinuity; 2. 2-3 months after the patient’s surgery, the patient is found to have blurred bone scabs by X-ray examination, as this stage is in the recovery period, and bone discontinuity cannot be diagnosed at this time.