Skip to main content
. 2011 Jun 1;5(2):36–43. doi: 10.1016/j.esas.2011.01.003

Fig. 9.

Fig. 9

Radiographic evidence of screw loosening. The “halo” around the L4 and L5 screws in the vertebral body and pedicle should be noted. This patient also presented with a pseudarthrosis of the L5-S1 interspace at 4 years postoperatively and underwent revision to an L4-S1 fusion and repair of the pseudarthrosis.