a The lateral view of Patient 1 in Group I shows an L3 vertebral compression fracture and an intact T12 before the operation. b T12 was further collapsed at the three-month follow-up. c The recent T12 fracture remains at the one-year follow-up. d Anteroposterior view, preoperative radiograph. e Anteroposterior view, three-month follow-up. f Anteroposterior view, one-year follow-up.