The junctional region T12-L1 between thoracic kyphosis and lumbar lordosis has no intrinsic curvature and vertebral endplates are physiologically parallel 1. Posttraumatic malunion and sagittal imbalance at the thoracolumbar junction may lead to accelerated disc degeneration. Surgical correction is usually indicated for severe deformities leading to chronic back pain. Closing wedge osteotomies through a single posterior approach have been advocated for lumbar and thoracolumbar levels 2. Closing-opening wedge osteotomies have been described for thoracic deformities, thus avoiding a column shortening 3. Double approaches allow a release and graft of the rigid anterior column, which is combined with a posterior instrumentation and correction of sagittal alignment 4, 5. Although anterior video-assisted approaches have become increasingly minimally invasive 6, posterior correction is usually performed through a classic open procedure.
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