Treatment of Adolescent Idiopathic Scoliosis Patients Using the Ellipse MAGEC System

Inclusion Criteria: * Diagnosis of Adolescent Idiopathic Scoliosis * Failed external brace therapy defined as either (a) progression of the curve greater than 5 degrees at any time while undergoing external brace therapy, or (b) inability or unwillingness to comply with at least 16 hours per day of external bracing * Skeletally immature (Risser Sign 0, 1, 2, or 3) * In girls, either (a) pre-menarchal, or (b) post-menarchal by no more than 6 months * Age between 10 and 15 * Primary Cobb angle greater than 25 degrees but not yet requiring spine fusion * Candidate for surgical implantation of spinal instrumentation * Patient resides locally with respect to the Investigator's clinic and is willing and able to comply with the requirements of the protocol * Must sign informed consent to permit the use of personal health data Exclusion Criteria: * Patients with a pacemaker, implanted cardiac defibrillator, or any other electronic implant * Patients who require an MRI following implantation * Skeletally mature (Risser Sign 4 or 5; or fused tri-radiate cartilage) * Diagnosis of other musculoskeletal or developmental illness that might be responsible for the spinal curvature * History of previous surgical treatment for AIS