Use of unilateral screw-stick and cage bone graft fusion for the treatment of lumbar disc herniation

Previous traditional surgery is simple removal of nucleus pulposus, but the study of Eie et al. shows high recurrence rate of lumbago and herniation after such surgery, 3 therefore, fusion internal fixation of interbody fusion cage combined with bilateral pedicle internal fixation system is often used for treatment at present, so that three-dimensional fixation can be achieved at fused lumbar spine segment to improve postoperative fusion rate. 4 However, some researchers found, in long-term follow-ups for the patients with bilateral internal fixation, that the greater the strength of internal fixation is, the greater stress-shielding effect becomes, which will cause bone mass loss of fused vertebral body. 5 Besides, for the bilateral fixation, bilateral posterior muscles and soft tissues are separated to a large extent, and the rigidity of fused segment is excessive, which aggravate adjacent ABSTRACT