Spinal Fusion: Procedure, Recovery, and What to Expect

Spinal fusion is a surgical procedure in which two or more vertebrae are joined into a single bony unit to stop abnormal movement and reduce pain. This procedure is used for serious spinal conditions when conservative treatment has proven ineffective.

What is spinal fusion

During spinal fusion, the surgeon stabilizes unstable vertebrae using specialized hardware: screws, rods, and cages. A bone graft is placed between the vertebrae, which gradually fuses with the bone over time to create a solid connection. The surgery eliminates abnormal motion in the affected segment and relieves pressure on nerve structures.

Indications for surgery

• Spinal instability following trauma or degenerative changes
• Spondylolisthesis: vertebral slippage compressing nerves
• Severe spinal canal stenosis
• Degenerative disc disease with chronic pain unresponsive to conservative care
• Spinal deformities, including adult scoliosis

Types of spinal fusion

Posterior fusion

The spine is accessed through an incision in the back. This is the most common approach, using pedicle screws and rods for fixation.

Anterior fusion

The spine is accessed through the front or side of the body. This approach is used to replace a damaged disc with a cage filled with bone graft material.

The procedure

The operation is performed under general anesthesia and lasts 2 to 5 hours depending on the extent of the surgery. The surgeon places fixation hardware, removes the damaged disc, and positions the bone graft. Intraoperative imaging ensures precise implant placement.

Recovery and rehabilitation

Recovery from spinal fusion takes 3 to 6 months. During the first weeks, patients should limit physical activity and wear a brace. Exercises to strengthen back muscles are gradually introduced. Complete bony fusion typically occurs within 6 to 12 months.