Fig. 1

Flowchart of modified osteotomy model. A and B show the osteotomy scope, which includes one lamina, transverse process, inferior articular process of upper vertebral body, and unilateral pedicle of osteotomy vertebral body corresponding to collapsed vertebral body. C Excision of vertebral bone mass protruding into spinal canal. D Drive from the rear to the front column through a special screwdriver. E and F The anterior column and middle column of vertebral body were partially lifted, and the compression in spinal canal and kyphosis was obviously improved