(OBQ04.50)
A 45-year-old man with ankylosing spondylitis presents with fixed sagittal imbalance and difficulty with horizontal gaze. His kyphotic deformity is localized to the thoracolumbar spine. Which of the following procedures allows the most correction in the sagittal plane at a single level without having to resect the intevertebral disc?
QID:
111