Many clinical patients with nonunion have shown that the survival rate of bone grafting surgery is too low. If bone grafting surgery must be performed, the important conditions for successful bone grafting surgery in patients with nonunion are as follows:

1. Completely cure local bone and soft tissue infections to eliminate potential infection and recurrence of postoperative infection. Chance.

2. If there are large local skin and soft tissue scars, they should be excised first and repaired with appropriate skin flap transplantation.

3. The sclerotic area at the fracture end and the surrounding scar tissue must be fully removed, and the medullary cavity must be drilled through to create a transplant bed with rich blood supply and active growth around the bone graft to ensure that the bone graft is success.

4. The number of bone grafts should be sufficient, there should be extensive and close contact between the grafted bone and the receiving bone, and reliable internal fixation should be used. It is best to use fresh autologous cortical bone for bone grafting. Add cancellous bone between bone end grafts.

5. The scope of external fixation should be sufficient and the time should be sufficient. Functional exercises should be performed during the immobilization period to improve local blood circulation and promote healing.

6. Strict aseptic technique to prevent wound infection. In recent decades, due to the improvement of technology, the success rate of bone grafting has been improved, but there are still some cases of failure. The reasons are closely related to the shortcomings of treatment, and must be paid attention to and prevented.

The causes of fracture nonunion, bone defects and local pathological changes vary.