Osteoarthritis is categorized into atrophic osteoarthritis and hypertrophic osteoarthritis, where hypertrophic osteoarthritis has a bone scab growth and atrophic osteoarthritis does not have a bone scab growth. After a fracture, a bone scab will be formed during the healing process, and if no healing occurs within nine months, it is called a nonunion. The formation of bone nonunion is mostly due to local blood supply obstruction, poor fracture position, wound infection, improper fixation and so on. Hypertrophic bone nonunion has bone scab growth, but no continuous bone scab through the fracture line. Atrophic osteochondroses have no scab growth. Therefore, fracture patients should be hospitalized promptly after fracture, and the fracture should be fixed and repositioned, and after treatment, the fracture should be reviewed regularly in the hospital to determine the fracture healing. Braking and immobilization are required. If the fixation is not proper, there may be bone disunion, which needs to be re-treated. After the fracture, patients can eat more food rich in calcium and protein, avoid excessive activities and maintain rest. Fractures should be reviewed by a healthcare provider in a timely manner to prevent the development of bone nonunion.