What is spinal fusion?
Spinal fusion is an operation that permanently joins two or more vertebrae so they heal into a single, solid bone. By stopping movement at a painful or unstable segment, it aims to reduce pain that comes from that motion and to steady the spine. It is used for conditions such as a slipped vertebra (spondylolisthesis), advanced disc degeneration, spinal curvature, or instability found after decompression. Fusion is a bigger decision than many spine procedures, because the change it makes is lasting.
What happens during the procedure
The operation is done under general anesthesia. The surgeon places bone graft - your own bone, donor bone, or a substitute - between or across the vertebrae to be joined. Screws, rods, or a cage are usually added to hold the segment while the graft grows into new bone. The spine can be reached from the back, front or side; in selected cases, a minimally invasive approach may be used. The route depends on the level, anatomy and correction required.
Benefits and considerations
Fusion is intended to stabilize a segment where movement or instability is linked to symptoms. It removes motion at the treated level, and changes can develop at neighbouring levels over time. Other risks include non-union, infection, bleeding, hardware problems and nerve injury. Decompression alone, a motion-preserving option or continued non-surgical care may be alternatives in selected cases.
Recovery and what to expect
Walking and rehabilitation are introduced when it is safe. Hospital stay and return to activity depend on the procedure, number of levels, your health and early recovery. The fusion is monitored over time, and your surgeon will provide an individual plan for wound care, medication, work, driving, lifting and physiotherapy. If fusion has been recommended, a second opinion can review the diagnosis, proposed levels and alternatives.
How we approach your care
- 01
Find the true source
We begin with a thorough history and examination, supported by imaging where appropriate, to pinpoint the precise source of the problem.
- 02
Consider appropriate options
Where clinically appropriate, we consider established non-surgical options before surgery. The plan depends on the diagnosis, symptoms, health and priorities of the individual patient.
- 03
A plan built around you
Every step is explained clearly, so you always understand your options and what comes next.
This may help if
- Imaging shows instability, a slipped vertebra, or a worn segment driving your pain
- Pain clearly comes from movement at a specific level
- Non-surgical care and, where suitable, injections have not given lasting relief
- A decompression alone would leave the segment unstable
Suitability can only be assessed after reviewing your symptoms, examination, relevant imaging and previous treatment.
Common questions
What is spinal fusion?
Spinal fusion is an operation that permanently joins two or more vertebrae so they heal into a single, solid bone. By stopping movement at a painful or unstable segment, it aims to reduce pain from that motion and steady the spine. It is used for a slipped vertebra, advanced disc degeneration, curvature, or instability found after decompression.
Will spinal fusion limit how I move?
Fusing a segment removes movement at that level. The effect on overall flexibility varies with the number and location of levels treated and your movement before surgery. Changes can also develop at neighbouring levels over time.
Is there a less invasive alternative to fusion?
Sometimes. Depending on the diagnosis, decompression alone, a motion-preserving option, or continued non-surgical care may be reasonable alternatives. Where fusion is the right choice, a minimally invasive approach with smaller incisions may be possible for suitable patients. The best option varies from person to person and depends on what is driving your pain.
Should I get a second opinion before spinal fusion?
A second opinion can review whether your symptoms, examination and imaging support fusion, why stabilization is proposed and whether decompression alone, continued non-surgical care or a motion-preserving option is appropriate.
How long until the bone fuses and I recover?
Length of stay and return to activity depend on the procedure, number of levels, your health and early recovery. The fusion is monitored over time. You will receive an individual plan for walking, work, driving, lifting and physiotherapy.
What are the risks of spinal fusion?
Risks include the bones not fully joining (non-union or pseudarthrosis), infection, bleeding, hardware problems, and nerve irritation. Over time, the levels next to the fusion can wear faster. Smoking is discouraged because it lowers the chance of a solid fusion. Your surgeon will discuss the risks that apply to your specific case openly.