Evaluation of Surgical Treatment of Idiopathic Scoliosis With Vertebral Body Tethering Versus Posterior Spinal Fusion.

Inclusion Criteria: * Patients diagnosed with adolescent idiopathic scoliosis who underwent surgical correction using posterior spinal fusion or vertebral body tethering from 2019 to 2022 and provided informed consent; * Males or females aged 12 to 18 years at the time of surgery; * Sanders skeletal maturation age ≤ 6; * Thoracic scoliotic curve ≥ 40° COBB and ≤ 60° COBB, measured on upright full spine x-rays, anterior-posterior pose. Exclusion Criteria: * Patients who had previously undergone spinal or thoracic surgery prior to adolescent idiopathic scoliosis correction; * Surgically treated patients with scoliosis of a non-idiopathic etiology; * Patients with anamnestic, clinical, and radiographic characteristics that do not fall within the indication window for the surgical technique of vertebral body tethering; * Patients with severe intramedullary malformations (syringomyelia greater than 4 mm, Chiari malformation, or tethered cord); * Structured scoliotic lumbar curve \> 35°, as measured by Cobb radiography. * Patients who do not provide informed consent to the study.