Fig. 1.

X-ray and computerized tomography (CT) of the case. A : Lateral lumbar X-ray shows a radiolucent halo around L5 pedicle screw (arrow). B : Pre-reoperative CT of the L5 pedicle showing the radiolucent halos around the screws (arrows). C : Post-reoperative anterior-posterior (AP) X-ray checked 10 months after reoperation shows the pedicle screw fixation of L3/4/5 with the intertransverse bone fusion (arrow head). Each peri-implant hollow is filled with PMMA and a new screw (arrows). D : Post-reoperative CT reveals the halos are filled with radiopaque bone cement (arrows) and new pedicle screws. E and F : flexion and extension lateral view of lumbar spine checked 10 months after reoperation showed strong fixation between instruments and vertebral bodys.