History & Principles of Rebuilding the Broken Spine
Chapter 15
Lumbar Fusion Cages and Pedicle Screws
These titanium cages may be placed in the disk space to help provide support and limit movement. The X-ray shows a patient in whom pedicle screws have also been placed. The cages are typically filled with bone graft material and bone growth promoting proteins. Cage comparison reprinted with permission of Medtronic, Inc.