Spinal Fusion Surgery

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Key Facts: Spinal Fusion Surgery

  • Spinal fusion permanently joins two or more vertebrae to eliminate motion at a damaged or unstable spinal level, relieving pain and restoring structural stability and integrity.
  • It is most commonly recommended for spondylolisthesis, degenerative disc disease, scoliosis or kyphosis, spinal fractures, and severe instability that has not responded to conservative care.
  • Success rates for spinal fusion are well studied and very high, depending on the condition treated, the surgical approach, the patient’s overall health, and structure of post-operative rehabilitation.
  • Recovery follows a structured timeline: most patients return to light activity within 4 to 6 weeks, with full bone fusion and return to normal activities typically taking 6 to 12 months.

What Is Spinal Fusion Surgery?

Spinal fusion surgery is a surgical technique that permanently joins two or more vertebrae together by “welding” them into a single, solid unit – eliminating painful motion, restoring alignment, and providing stability to the spine.

A fusion procedure may be recommended to eliminate painful motion between vertebrae, correct abnormal posture or spinal alignment, or provide structural stability in cases where the spine has become unstable. In certain cases, your surgeon may perform a laminectomy in addition to the fusion if you have leg symptoms such as pain, numbness, or tingling caused by nerve compression.

A fusion simply means getting one bone to grow into another. Most commonly, this involves removing part of the disc – the natural shock absorber between vertebrae – and replacing it with an implant that promotes bone growth. The hardware spine surgeons place in the body during this process acts as a scaffold that speeds up bony healing. Once the bone has completely grown across the treated level, a complete fusion has occurred.

When Is Spinal Fusion the Right Choice?

Spinal fusion is most appropriate when the primary source of a patient’s pain is abnormal or unstable motion between vertebrae – and when that instability cannot be safely addressed with a motion-preserving alternative or conservative care.

The three most common reasons VSI surgeons recommend fusion:
Abnormal spinal motion. Spondylolisthesis – the forward slippage of one vertebra over another – can cause significant back pain and nerve pressure, resulting in sciatica, leg pain, tingling, and numbness. Fusion holds the spine in proper alignment and takes pressure off the affected nerve.

Abnormal spinal posture or deformity. Conditions like scoliosis and kyphosis cause the spine to curve or hunch abnormally, which can produce severe back and leg pain over time. Fusion straightens the spine and holds it in a corrected position to relieve symptoms and prevent further progression.

Painful disc degeneration with instability. When a spinal disc deteriorates to the point that it can no longer provide adequate support and the resulting instability is the driver of pain, fusion removes the damaged disc and eliminates the painful motion at that level.

Fusion is generally considered when these conditions have not improved after at least three to six months of conservative treatment including physical therapy, medications, and injections. It is also indicated for spinal fractures that cannot heal naturally, or for severe instability that poses a risk of neurological damage.

Is Spinal Fusion Always the Answer?

No, and we believe the most important part of any surgical consultation is determining whether fusion is truly the right approach for you, or whether a motion-preserving solution could achieve the same outcome while keeping your spine moving.

For patients with disc-related pain at one or two levels without significant instability or deformity, alternatives to fusion may offer equivalent or superior outcomes with a faster recovery and reduced risk of long-term complications such as adjacent segment disease – the accelerated degeneration that can occur at spinal levels neighboring a fusion.

VSI’s motion-preserving options include:

  • Artificial Disc Replacement – replaces the damaged disc with a prosthetic implant that preserves natural range of motion at the treated level
  • TOPS™ System – an FDA-approved posterior implant for lumbar stenosis with spondylolisthesis that preserves motion as an alternative to fusion; received a rare “superior to fusion” clinical designation
  • Hybrid Spine Surgery – combines disc replacement at select levels with fusion where greater stability is required, tailored level by level to each patient’s anatomy

When you consult with a VSI surgeon, you will receive an honest recommendation based on imaging, clinical examination, and your personal goals – not a one-size-fits-all path to the operating room.

    Types of Spinal Fusion Surgery

    Spinal fusion can be performed through several different surgical approaches depending on the location of the problem, the condition being treated, and the patient’s anatomy. VSI surgeons are experienced across the full spectrum of fusion techniques.

    A corpectomy removes one or more vertebral bodies, rather than just the disc, to relieve pressure on the spinal cord, and is performed through a small incision at the front of the neck.

    This procedure is used in cases where compression is located within the vertebral body itself rather than at the disc level, and where simple discectomy would not adequately decompress the spinal cord.

    Anterior cervical discectomy is one of the most common cervical spine procedures, performed through a small incision at the front of the neck to remove a damaged disc and fuse the adjacent vertebrae.

    Spinal fusion in the cervical spine stabilizes the spinal bones and creates a solid bridge of bone between two or more vertebrae. ACDF may be recommended when the natural disc space has decreased or the cervical spine has become unstable, causing neck pain or nerve symptoms radiating into the arms.

    Anterior lumbar interbody fusion approaches the lumbar spine from the front of the body through a minimally invasive incision, allowing removal of a degenerative disc and placement of a fusion implant without disturbing the muscles of the back.

    This approach provides excellent visualization of the disc space and allows for a large implant to be placed, which can improve the rate of successful fusion and restore disc height more effectively than posterior-only techniques. The goal of this surgical technique is to alleviate pain, numbness or tingling caused by a degenerative lumbar disc.

    Hybrid spine surgery is an innovative procedure that combines the stability of traditional spinal fusion with the mobility of artificial disc replacement, treating multiple spinal levels with a customized solution tailored to each patient’s anatomy.

    VSI surgeons were the first in the U.S to perform hybrid spine surgery. This approach is ideal for patients with multi-level disease where motion can be preserved at some levels and stability is required at others.

    Lateral interbody fusion approaches the spine through the patient’s side, separating tissue fibers rather than cutting through them, to access and fuse the lumbar spine with minimal disruption to the back muscles.

    Both XLIF (eXtreme Lateral Interbody Fusion) and DLIF (Direct Lateral Interbody Fusion) refer to the same technique. This approach is particularly effective for realigning the spine and decompressing nerves without the tissue disruption associated with a posterior incision.

    A posterior instrumented fusion involves the placement of screws and rods. This can be done for interbody fusion or for deformity surgery such as scoliosis or kyphosis. With this procedure, innovative technology can be utilized which allows your surgeon to visualize the placement of hardware during this procedure. This provides increased precision for accuracy of screw placement and less soft tissue cutting.

    Posterior Lumbar Interbody Fusion (PLIF) is a lumbar fusion surgery from the back. Bone is removed to create a window to open the spinal canal. This creates access to remove disc material in order to prepare the space for implants to fuse the bones together. Screws and rods are used to stabilize this fusion process.

    Sacroiliac (SI) joint fusion is recommended when the SI joint, which connects the sacrum and pelvis and acts as a shock absorber for the spine, becomes chronically unstable or painful and does not respond to conservative treatment.

    Sacroiliac joint dysfunction is first treated conservatively with physical therapy, medications, SI joint injections, and non-surgical SIJ fusion. Surgical fusion is considered when pain persists despite these measures, with the goal of permanently stabilizing the joint.

    Transforaminal lumbar interbody fusion is a posterior lumbar fusion approach that accesses the disc space through the foramen (the natural opening where the nerve exits the spine), placing interbody implants and bone graft to create a solid bridge between vertebrae.

    This technique allows surgeons to decompress the nerve and achieve interbody fusion through a single posterior approach, and is one of the most commonly performed lumbar fusion procedures.

    Kyphosis correction surgery uses minimally invasive robot-guided techniques and artificial intelligence to create an individualized surgical plan based on each patient’s own anatomy. It then corrects the deformity using screws and rods before allowing the spine to fuse in a new, more normal alignment.

    For patients with kyphosis, this approach improves quality of life by correcting the deformity and preventing further curve progression and worsening of symptoms.

    Scoliosis and deformity corrective surgery realigns the spine in patients with abnormal curvatures for both adult and adolescent scoliosis, using fusion to hold the corrected alignment over time.

    VSI’s scoliosis specialists will help you understand the prognosis of your spine and develop a solution tailored to your specific curve, whether managed non-operatively or through one of several surgical approaches.

    How VSI Performs Spinal Fusion Differently

    VSI surgeons perform spinal fusion using advanced surgical technology that improves precision, reduces complications, and supports faster recovery – setting our outcomes apart from standard practice.

    Robotic surgical guidance allows VSI surgeons to plan the exact placement of every screw before entering the operating room, then execute that plan with real-time robotic assistance. This reduces the margin of error in hardware placement and minimizes disruption to surrounding tissue. In April 2026, our team performed the world’s first spine surgery with the Stealth AXiS™ Autopilot Robotic System, which is the latest innovation in safer, more precise spine surgery. 

    Explore VSI Surgical Firsts

    Intraoperative navigation overlays imaging data onto the surgeon’s real-time view of the operative field, enabling accurate visualization of spinal anatomy throughout the procedure without repeated radiation exposure.
    Minimally invasive approaches, including lateral and anterior techniques, allow VSI surgeons to access the spine with smaller incisions, less muscle disruption, and faster recovery timelines compared to traditional open fusion surgery.

    These surgical technologies don’t just make surgery more precise; they translate into measurably better outcomes for patients. This includes reduced complication rates, shorter hospital stays, and more predictable recovery trajectories.

    Expectations Before and After Spinal Fusion Surgery

    Before Fusion Surgery

    Preparing thoroughly for spinal fusion surgery significantly improves recovery outcomes. Before your procedure, VSI’s care team will walk you through everything you need to know, including:

    • Stopping smoking at least two weeks prior, since smoking substantially increases the risk of complications
    • Discontinuing certain medications and supplements that can affect bleeding or bone healing
    • Arranging for a support person to assist with transportation and daily tasks in the initial recovery period
    • Stocking your home with prescribed medications, wound care supplies, and high-protein foods to support healing
    • Working with your VSI Recovery support to schedule out healing therapies and rehabilitation post-surgery

    After Fusion Surgery

    Recovery from spinal fusion follows a structured timeline, and your adherence to post-surgical care is one of the most important factors in your outcome.

    You will need someone to drive you home and help with daily tasks initially. Pain management is critical in the early weeks. You’ll need to take medications as directed and contact your care team if pain becomes unmanageable. Activity should be limited at first, with short frequent walks encouraged to promote circulation and healing. Lastly, avoid heavy lifting, bending at the waist, or twisting the spine during the healing period.
    Recovery typically progresses as follows:

    • 4 to 6 weeks: Initial recovery; pain management and light activity
    • 3 to 4 months: Significant healing underway; most patients begin physical therapy and experience improved mobility
    • 6 to 12 months: Full bone fusion complete; return to normal activities for most patients

    VSI’s Recovery Revolution™ program provides structured, comprehensive support throughout your recovery – including on-site spine-specialized physical therapy, aquatic therapy, hyperbaric oxygen therapy, and close monitoring by your care team to ensure you’re progressing on track.

    Risks of Spinal Fusion Surgery

    As with any surgery, spinal fusion carries risks that your VSI surgeon will review with you in detail during your consultation – and that VSI’s advanced surgical techniques are specifically designed to minimize.

    Potential risks include infection, blood loss, damage to nerves or blood vessels, hardware complications such as screw loosening or rod breakage, and failure to achieve complete bone fusion (known as pseudoarthrosis). Antibiotics are administered before, during, and often after surgery to reduce infection risk. These risks are extremely unlikely to occur.

    Patients with certain health conditions including osteoporosis, diabetes, or a history of smoking, may face elevated complication. Your surgeon will discuss your individual risk profile and any steps you can take before surgery to optimize your outcome.

    What are the Benefits of Spinal Fusion Surgery?

    When fusion is the right choice for a patient’s condition, it can be genuinely life-changing. For those living with chronic instability, nerve compression, or progressive spinal deformity, fusion addresses the structural root of the problem rather than managing symptoms.

    Patients who are good candidates often describe significant improvement in pain, function, and quality of life – with many returning to work, exercise, and daily activities they had given up.

    • Eliminates painful motion between unstable or damaged vertebrae
    • Restores spinal alignment and posture
    • Provides long-term structural stability to the spine
    • Relieves nerve pressure that causes leg pain, numbness, and tingling
    • Corrects spinal deformity in scoliosis and kyphosis
    • Improves quality of life and ability to return to daily activities

    Do I Qualify for Spinal Fusion Surgery?

    The best way to determine whether spinal fusion or a motion-preserving alternative is right for you is a thorough evaluation with a VSI spine specialist experienced in the full spectrum of surgical options.

    VSI’s physicians will review your imaging, assess your symptoms, and give you an honest recommendation based on your specific anatomy, condition, and goals. Our approach is never to default to the most invasive option – it’s to find the right option for you.

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    Frequently Asked Questions on Spine Fusion Surgery

    Spinal fusion is a surgical procedure that permanently joins two or more vertebrae in the spine by encouraging bone to grow across the treated level, eliminating motion between them. It is used to relieve pain caused by abnormal spinal motion, correct deformity, or stabilize the spine after injury or significant degeneration.

    The three most common reasons are: abnormal motion caused by spondylolisthesis (forward slippage of one vertebra over another), which results in back pain and nerve pressure; spinal deformity such as scoliosis or kyphosis causing severe pain and postural problems; and painful disc degeneration where the damaged disc and resulting instability are the primary drivers of pain. Fusion may also be required for spinal fractures that cannot heal naturally or severe instability that risks neurological damage.

    Fusion is not appropriate for every patient – and at VSI, we evaluate every candidate for motion-preserving alternatives before recommending surgery. For patients with disc disease at one or two levels without significant instability, artificial disc replacement, the TOPS™ System, or hybrid surgery may provide equivalent or better outcomes while preserving spinal motion and reducing the risk of adjacent segment degeneration.

    Success rates generally range from 70% to 90%, depending on the condition being treated, the surgical approach, the patient’s age and overall health, and adherence to post-operative care and rehabilitation. Anterior interbody fusion approaches typically achieve the highest fusion rates. Your VSI surgeon will discuss what outcomes data applies specifically to your situation and procedure.

    Recovery follows a structured timeline. Initial recovery – focused on pain management and limited activity – typically takes 4 to 6 weeks. Significant healing and the start of physical therapy generally occur between 3 and 4 months. Full bone fusion and return to normal activities can take 6 to 12 months. Following your care plan closely is one of the most important factors in achieving a good outcome.

    A back brace stabilizes the spine during the early healing phase, reduces movement that could disrupt the fusion process, and minimizes strain on the surgical site. It also helps manage pain and reduces the risk of hardware displacement while the bone is still healing. Your surgeon will advise whether a brace is necessary for your specific procedure and how long you should wear it.

    In the initial recovery period, avoid heavy lifting (generally nothing over 8 to 10 pounds), bending at the waist, twisting the spine, high-impact exercise, or any strenuous physical exertion. These restrictions are progressively lifted as healing advances and your spine specialist clears you for increased activity. Always follow your surgeon’s specific guidelines.

    Adjacent segment disease (ASD) refers to the accelerated degeneration of spinal levels above or below a fusion, caused by the increased mechanical load those levels bear when motion is eliminated at the fused segment. It is one of the known long-term risks of fusion surgery and one of the reasons VSI evaluates every appropriate patient for motion-preserving alternatives. Not every fusion patient develops ASD, but it is an important factor in the long-term treatment planning conversation.

    Incomplete or failed fusion – known as pseudoarthrosis – occurs when the bone does not fully grow across the treated level. Symptoms may include persistent pain, hardware loosening, or loss of correction. VSI’s surgical technology – including robotic guidance and intraoperative navigation – is specifically designed to minimize this risk.

    Yes. VSI is a nationally recognized leader in motion-preserving spine surgery, including cervical and lumbar artificial disc replacement, the TOPS™ System, and hybrid spine surgery – a procedure VSI surgeons pioneered nationally. When you consult with VSI, you receive an honest assessment of every option available to you, not just a referral to the most common procedure.