In 2006, Richards et al. reported one of the largest sample sizes at the time (1,046 cases) in a study of revision surgery after initial fusion surgery for adolescent idiopathic scoliosis. They found a revision surgery rate of 12.9% at 15 years postoperatively. 2009 study by Luhmann et al. found a revision rate of 3.9% at 5.7 years of follow-up after spinal fusion in patients with adolescent idiopathic scoliosis, which was less than one-third of the rate found by Richards et al. Their study found that 47 revision surgeries were performed at an average of 26 months after the initial surgery. Of these, 20 (43%) were revision spine surgeries for pseudoarthrosis, progression of scoliosis in the nonfixed area, or kyphosis in the junction area, 16 (34%) for SSI,7 (15%) for implant removal due to pain and/or subcutaneous augmentation, 2 (4%) for revision due to loosening of the implant, and 2 (4%) for elective thoracoplasty. The revision rate was 3.7% for the posterior procedure, 4.3% for the anterior procedure, and 4.1% for the combined anterior and posterior procedure. There was no significant difference in the revision rate between the different surgical procedures. The differences in revision rates after initial spinal fusion in adolescent idiopathic scoliosis patients in different studies are more likely to be due to a combination of factors such as the patient’s own condition, the surgeon’s experience, and the condition of the hospital’s equipment.