Bone fractures are treated with plaster immobilization, which takes at least 4 weeks. The fracture is a minor fracture, relatively stable locally, with good alignment and alignment, adequate contact area, and less severe disruption of blood circulation around the periosteum, so the fracture will heal relatively quickly. The healing time for fractures is generally at least 4 weeks, depending on the patient’s age, physical condition, and nutritional factors. In children, the healing time is correspondingly faster, with some children healing in about 3 weeks. Older people will be correspondingly slower, and some older people may not have their bone fractures healed in 2 months’ time. Therefore, if the bone fracture is fixed in a cast, the duration of fixation is considered to be more than 4 weeks, and the patient’s specific situation should be examined and examined accordingly to determine how long the fracture should be fixed.