A posterior lumbar laminectomy, which is also called a decompression, is done to treat pain caused by degenerative conditions in the lower back. Disc degeneration, bone spurs, and other conditions can cause narrowing and pressure on the spinal nerves (radiculopathy) exiting the spine. A laminectomy procedure removes part of the vertebral lamina to reduce the pressure.
After removing bone during a posterior lumbar laminectomy, bone grafts can be added to fuse the vertebrae and support the spine. In instances where there is instability, instrumentation is added to provide greater stability to the spine.
Following a posterior lumbar laminectomy, bone grafts can be used for fusing vertebrae to stabilize and support the spine. In patients with little or no instability, where the vertebrae, discs, and surrounding tissues fit tightly together, adding instrumentation is not necessary and the bone grafts can sufficiently stabilize the spine.