ILIF: Interlaminar Lumbar Instrumented Fusion

Interlaminar lumbar instrumented fusion (ILIF) is a minimally invasive procedure. It frees compressed spinal nerve roots and places a metal implant to stabilize the spine, easing back problems from conditions such as spinal stenosis, spondylolisthesis, and degenerative arthritis.

Reaching the Spine

The patient is given anesthesia and positioned. Through a small incision in the lower back, an opening is made in the ligaments at the back of the spine. This exposes the spinous processes, the bony bumps on the back of the spine, above and below the damaged disc.

Preparing the Spine

Part of the upper spinous process is removed, along with parts of the lamina and facet bones on both vertebrae. Shaped donor (allograft) bone is set into the cleared space between the spinous processes. It encourages them to fuse and acts as a protective cover over the spinal cord and nerves.

Placing the Implant

The metal implant is put in and clamped in position. It steadies the spine and holds the spinous processes in place while the fusion forms.

Setting Up the Fusion

Small pieces of bone (morselized bone) are packed over the prepared facet joints and in the space between the spinous processes above the allograft. Over time this bone and the allograft grow into a bridge that fuses the vertebra above to the one below.

After Surgery

The incision is stitched closed and bandaged. Patients usually go home later the same day or after a short hospital stay.

Questions about ILIF: Interlaminar Lumbar Instrumented Fusion? Call Dr. Auerbach’s office at (718) 518-5814 or send a message.

This information is for general education and does not replace advice from your doctor.

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