RecruitingPhase 4Biological interventionSafety and Efficacy of Subdermal Betadine During Posterior Spinal FusionBacterial in the subdermal layer of the skin, such as in hair follicles and sweat glands, may contaminate surgical wounds. The goal of this study is to learn about povidone-iodine and its ability to prevent infections specifically in patients with scoliosis receiving a spinal fusion.