Pedical subtraction osteotomy combined with multisegmental V shaped lamina osteotomies for correc-tion of severe kyphosis in ankylosing spondylitis;

Objective To introduce the method and effect of posterior approach meta-whole vertebrae osteotmony and internal fixation in treatment of the old thorocolumbar verterbral fractures.

Objective To investigate the appliance of closing wedge osteotomy in treatment of posttraumatic kyphotic-scoliotic deformity in thoracolumbar spine.

Objective To report the experiences of the second transpedicle internal fixation and vertebral osteotomy for severe kyphosis patients with thoracolumbar vertebral fracture after the first transpedicular screw was removed.