In clinical practice, when a comminuted fracture occurs and is fixed in a cast, there is no uniform clinical rule on the specific time of cast removal. Because the treatment method is different and the age of the patient is different, the time of cast removal is also different. If a child has a comminuted fracture, conservative treatment is given with manipulation and cast fixation, and the cast can be removed and functional exercise can be considered in 3-4 weeks after treatment. If a comminuted fracture occurs in an adult, conservative treatment is given with cast immobilization, and a cast can usually be considered 4-6 weeks after treatment. If a pulverized fracture occurs in an adult and is treated surgically with incision and internal fixation, removal of the cast is generally considered about 4 weeks after surgery. Regardless of the method of treatment, X-rays must be taken before removal of the cast to clearly diagnose a well healed fracture with bone scab growth before removal of the cast can be considered.