Thoracic internal fixation due to thoracic spine fracture (e.g. compression fracture, thoracic spine tumor, etc.), the reasons for the loss of height include biomechanical factors during surgery, loss of intervertebral disc height, and failure to form an effective fusion of the fractured segments of the spine, etc. The therapeutic countermeasures include transpedicular intradiscal and/or interbody implantation of the vertebrae, vertebroplasty, and improvement of the stability of the screw or the fixator. 1. Transpedicular intra- and/or intervertebral bone grafting: There are 2 types of grafting: (1) Implantation of a fragmented bone block into the vertebral body. (2) After removing the adjacent intervertebral discs, the fragmented bone is implanted into the intervertebral space, and the intervertebral body is fused with bone graft. 2. Vertebroplasty: such as percutaneous puncture vertebroplasty, which has now become the first choice for the treatment of compression fracture and simple osteoporosis because of its remarkable effect in restoring the height of the vertebral body and other aspects. 3. Improvement of screw or fixator stability: In patients with osteoporosis, methods to improve screw stability (such as piercing the bone cortex in front of the vertebral body, increasing the length and diameter of the screws, etc.) need to be used when using pedicle screws to prevent loss of correction after surgery. In addition to the above reasons, causes of loss of height due to thoracic internal fixation include insufficient postoperative rest time, improper screw position, etc. Treatment may also include vertebroplasty. If any of the above symptoms occur, it is recommended to go to the hospital in time for early and regular treatment.