This is generally a very complex procedure in which a curved spine is straightened using a variety of correction methods. This is most commonly performed in adolescent patients who have not reached skeletal maturity and have spinal curves that measure greater than 40 degrees. The surgery is performed under general anesthesia and usually involves a long incision down the center of the back to allow for exposure of the curved spine. Special screws and rods are carefully affixed to the spine to allow for gentle straightening and de-rotation. Following surgery, patients stay in the hospital around 3 to 5 days for careful observation, pain control and physical therapy. Patients are braced for approximately 8 weeks following this procedure.