Spinal fusion (arthrodesis) joins or fuses two or more vertebrae with a bone graft. The bone is used to form a bridge between adjacent vertebrae. This bone graft stimulates the growth of new bone. In some cases, metal implants are secured to the vertebrae to hold them together until new bone grows between them. Instrumented fusion refers to specifically designed implants (including cages, rods, and screws) that are used to ensure correct positioning between vertebrae to help successful fusion take place. These implants add strength and stability to the spine.
Procedure
The vertical incision will be made in the center of your back. The length of the incision depends on how many levels need to be treated. Your surgeon will put in rods, screws, hooks, and/or wires (normally just rods and screws) to stabilize the affected area while the bone graft is healing or fusing. The screws are generally made of titanium and the rods are made of either titanium or cobalt-chrome.