Post-approval Registry Study to Evaluate the Continued Safety and Probable Benefit of the MID-C System for 5 Years Post-Implantation in Adolescent Idiopathic Scoliosis (AIS)

Inclusion criteria

• Adolescent Idiopathic Scoliosis classified as Lenke Type 1 or Type 5 curves;
• Cobb angle between 35-60 degrees (inclusive);
• Flexible curve that that reduces to ≤ 30 degrees on lateral side-bending radiographs or as evident by traction x-ray;
• Kyphosis angles of ≤ 55 degrees measured from T5 to T12;
• Appropriate candidate for posterior surgical approach;
• Patient has good general health;
• Patient has no known hypersensitivity or allergies to titanium;
• Patient's guardian signs a written informed consent form (ICF).

Exclusion criteria

• Any type of non-idiopathic scoliosis;
• Any main thoracic deformity that includes vertebral levels and cranial including to T2;
• Known history of existing malignancy, or any systemic or local infection;
• Spinal cord abnormalities that require treatment;
• Known neurological deficit (defined as motor grade < 5/5);
• Known poor bone quality defined as T score -1.5 or less;
• For female Patient, pregnancy;
• Previous spine surgery that would prevent the successful performance of the MID-C system ;
• Active systemic disease, such as AIDS, HIV, or active infection;
• Active infection or the skin is compromised at the surgical site;
• Systemic disease that would affect the Patient's welfare or overall outcome of the study.