P90. To prevent PJK in Scheuermann's Kyphosis, restore kyphosis to patient's PI value and choose proximal UIV. - Sarwahi, Vishal; Galina, Jesse M.; Hasan, Sayyida S.; Atlas, Aaron M.; Wendolowski, Stephen; Dowling III, Thomas J.; Fakhoury, Jordan; Orth, Sean Molloy; Benton, Adam; Lo, Yungtai; Amaral, Terry D.; Lui, Darren (Spine Journal, 2021)