A New Method for Determining the Distal Fusion Level and Saving Levels in Ais

Purpose: LIV is a crucial surgical decision as short fusions can lead to “adding on” or decompensation, while longer fusions limit flexibility and cause junctional problems. Neutral (NV) and stable vertebra (SV) on standing X-rays are commonly used for determining LIV. Suk et al reported utilizing NV or NV-1 for Lenke I curves and saving 1 or 2 levels. This study evaluates the number of levels saved when utilizing prone X-rays. Methods: A retrospective chart and X-ray review was performed. AIS patients with …