Different types of mechanical complications after surgical correction of adult spine deformity with osteotomy

Figure 3 An example of radiographic findings of screw pullout/loosening. Screw pullout is shown by white arrows at L5 and S1 bilaterally identified at the 6 mo follow-up visit after surgical correction of adult spine deformity with osteotomy. Pseudarthrosis was diagnosed later at 12 mo post-operative. The patient experienced increasing low back pain and “popping” with movement. A revision operation was performed at 12 mo follow-up to revise the fusion and re-instrument, including placement of iliac bolts.