Evaluation of the Effect of Revision Surgery of Lumbar Adjacent Segment Degeneration

Inclusion Criteria:

• For patients undergoing revision surgery in adjacent segments due to S-ASD, the revision surgery is at least half a year from the first operation;
• X-ray, CT and MRI examination data of the anterior and lateral extension of the lumbar spine were available within 1 month before surgery and at the last follow-up;
• Follow-up for at least 2 years after revision;

Exclusion Criteria:

• Patients with history of congenital spinal deformity, spinal tumor, spinal tuberculosis.