Screws Implantation Assisted With Mixed Reality Technology

Inclusion Criteria: * Course of disease≥6 months, all patients with lumbago back pain, radiation pain of lower limbs, lumbar disc herniation diagnosed with or without spinal stenosis. * The course of disease≥6 months, all patients had lumbar back pain, accompanied by or without intermittent claudication, and the diagnosis of lumbar spondylolisthesis was clear, but the vertebral isthmus was not broken. * The patient's symptoms were consistent with the imaging examination results, failed to respond to conservative treatment, and met the surgical indications. * The lesion segment is no more than 3 vertebral bodies. * Preoperative improvement of X-ray, CT, MRI examination. * Patients without active bleeding and female patients is not in menstrual period. Exclusion Criteria: * Lumbar acute infection, lumbar tuberculosis, tumor and other diseases. * Patients with severe cardiopulmonary insufficiency, intolerance to surgery, diabetes and poor blood glucose control, combined with coagulation dysfunction and other contraindications. * Vertebral fracture patients. * Bone Mineral Density (BMD) examination: BMD was measured by dual-energy X- ray absorptiometry at the lumbar spine (L2 \~ L4) and femoral head, and BMD and T values were observed. Abnormal bone mass were excluded according T \>- 1 SD