Table 1.
Patient demographics.
Fig 1.
The simulation of Y shape osteotomy in surgimap for patients with AS.
(A) Spino- pelvic parameters were measured and analyzed; (B) “Wedge Osteotomy” was applied at the posterior column of L2; (C) radiographic image after simulated osteotomy.
Fig 2.
The patient is placed prone on a radiolucent operating table
Fig 3.
(A) ‘Y’ type osteotomy was achieved; (B) the posterior wedge space was closed with appropriate opening of the anterior column; (C) intra-operative imaging shows L1 Y shape osteotomy
Fig 4.
Pre- and post-operative radiological outcomes.
(A, B, C) AP and lateral standing radiographs and sagittal CT scan of a 36-year-old man with thoracolumbar kyphosis secondary to ankylosing spondylitis; (D, E, F): Y shape osteotomy was performed at L2, and Two years of follow-up revealed the normal sagittal alignment was achieved.
Table 2.
The preoperative and last follow-up data of patients with AS.