Optimal Correction of Adult Spinal Deformities Requires Restoration of Distal Lumbar Lordosis

Figure 1

Clinical example of a patient from the “aligned group” with a low PI. Primary case, T9-S1 posterior fixation, multiples grade 2 osteotomies. Preoperative measurements (left) were PI = 41°, PT = 21°, PI-LL = 21, LL = -20°, TK = 22°, and SVA = 42 mm. One-year measurements (right) were PT = 17°, PI-LL = 0, LL = −41°, PLL = −8°, DLL = −33°, TK = 41°, and SVA = 41 mm.