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A preoperative whole-spine standing radiograph in the anteroposterior (A) and lateral (B) view. A whole-spine sitting radiograph after LLIF in the anteroposterior (C) and lateral (D) view. A whole-spine standing radiograph at one year following LLIF and posterior fixation without grade 2 osteotomy in the anteroposterior (E) and lateral (F) view. LLIF, lateral lumbar interbody fusion; SVA, C7 sagittal vertical axis; LL, lumbar lordosis; PT, pelvic tilt; PI, pelvic incidence.
