**2.1. Indications**

The implant is designed to be used in patients with AIS, aged 10–17 years, with a single major curve, either Lenke type 1 or Lenke type 5 curves, with a Risser sign between 0 and 4. The magnitude of the major curve should be between 30° and 60° and adequate flexibility on supine side bending views showing curve diminution to 35° or less. The device may be also used in individuals with smaller curves as an internal brace, especially in non-compliant external brace users.
