Fig. 1From: Risk factors for proximal junctional kyphosis after posterior long-segment internal fixation for chronic symptomatic osteoporotic thoracolumbar fractures with kyphosisIllustration of various spine pelvic parameters. SVA sagittal vertical axis, PI pelvic incidence, LL lumbar lordosis, TK Thoracickyphosis, PT pelvic tilt, SS sacral slopeBack to article page