Scoliosis surgery aims to straighten and stabilize the spine, but it may not completely eliminate all curvature. The degree of correction achieved depends on factors such as the severity of the scoliosis, flexibility of the spine, and the surgical techniques used. It's important to have realistic expectations and discuss the expected outcome with your surgeon before the procedure. Regular follow-up visits and X-rays are typically required to monitor the progress and ensure the long-term success of the surgery.