The best time to knot the bone for a fracture is usually within 2 weeks, but there are some special cases where the jointing has to be done differently depending on the situation. For example, in the case of a fracture of the neck of the bone, surgery is usually required within 24 hours, that is, internal fixation of the fracture. In the case of navicular fracture, it is also generally required to perform bone setting within 48 hours. If it is a comminuted fracture or open fracture, and the swelling is obvious, the bone should not be joined at this time, but the necrotic or contaminated soft tissue should be removed first, and then the wound should be cleared, and then the bone should be joined after the soft tissue has completely recovered and there is no infection. If the fracture is an open comminuted fracture, but the swelling is particularly obvious, the bone should not be jointed at this time, but should be jointed after the soft tissue swelling has subsided, which usually takes 2 weeks.