Objective To evaluate the surgical outcome of extensive vertebral lamina decompression,trans-vertebral pedicle internal fixation,inter-vertebral fusion and inter-transverse process bone graft and study the key point of degenerative lumber spinal canal stenosis surgery and the principle and the significance of traps-pedicle internal fixation in lumbar spinal canal stenosis.

Objective To study the effects of surgical decompression,posterior lumbar interbody fusion and pedicle screw fixation for the treatment of lumbar degenerative diseases.

Curative effect analysis of posterior laminatomy decompression, intertransverseprocess autograft fusion and transpedicle screw fixation on senile degenerative spondylolishthesis;

Objective It is to discuss the clinical effect of posterior laminatomy decompression, intertransverse process bonegrafting fusion and transpedicle screw fixation on spondylolishthesis.