Spinal Fusion & Stabilization After SCI: Every Way the Spine Gets Fixed, From the Neck to the Pelvis

Almost everyone with a traumatic spinal cord injury has a second injury sitting right next to the first one: a broken or unstable spinal column. The cord is the cable. The column is the conduit it runs through. Surgeons cannot repair the cable, but they can and do rebuild the conduit, and the way they do it shapes how you move, sit, transfer, and hurt for the rest of your life.

Mine runs from C2 down to C7: two titanium rods, one on each side of the spine, anchored by screws at every level. I woke up with it, and it took me a long time to understand what I actually had in my neck. This is the guide I wish I had been handed. It covers every way the spine gets stabilized or fused, from the base of the skull to the pelvis, in plain language, and then points you to deeper guides for the neck, the mid and low back, and life with the hardware afterward.

Why the Spine Gets Stabilized

Spine surgery after SCI has two separate jobs, and it helps to keep them apart in your head:

1. Decompression. Get whatever is pressing on the spinal cord off of it: bone fragments, a bulging disc, a dislocated joint, a blood clot, a tumor. This is the part with a clock on it. The current AO Spine and Praxis guideline (2024) recommends decompression within 24 hours of injury when it is possible, because people decompressed early are more likely to gain back a grade or more of function. You will hear surgeons say "time is spine."
2. Stabilization. Make the column solid again so that it cannot shift and injure the cord a second time, and so that you can sit up, be turned, go to rehab, and eventually live without a brace. Stabilization is done with hardware (rods, screws, plates, cages) and usually with a fusion, which means coaxing the bones to grow together into one solid piece.

Sometimes one operation does both jobs. Sometimes the cord is already decompressed but the column is unstable, so the surgery is purely stabilization. And sometimes the injury is stable enough that a brace does the job and there is no surgery at all.

The thing to be clear-eyed about: stabilizing the spine does not repair the cord. A perfect fusion with perfect hardware protects what you have and keeps the door open for recovery. It is not the recovery itself. If someone tells you a "successful surgery" means you will walk, they are talking about the column, not the cable.

The Map: Regions, Levels & Columns

You have 33 vertebrae. The ones that matter for surgery are the 24 that move, plus the sacrum and pelvis that everything sits on.

• Cervical (C1–C7), the neck. C1 (the atlas) and C2 (the axis) are shaped differently from everything else and handle about half of all head rotation. C3–C7 is the "subaxial" neck. Injury here means tetraplegia.
• Thoracic (T1–T12), the mid-back, braced by the rib cage. Fractures here need a lot of force, so they are often paired with severe cord injury.
• Lumbar (L1–L5), the low back. The cord itself ends around L1–L2 in adults; below that the canal holds a bundle of nerve roots called the cauda equina.
• Sacrum and pelvis (S1–S5), the fused wedge at the bottom and the ring of bone around it. Sacral fractures can injure the roots that run the bladder, bowel, and sexual function.

The thoracolumbar junction (T11–L2) is the single most common place to break the spine, because it is where the stiff, rib-braced thoracic spine meets the mobile lumbar spine.

A motion segment is two vertebrae plus the disc and the two small facet joints between them. A fusion is always described by the segments it locks: "C5–C6" is one segment, "C2–C7" is five.

Is it unstable? The classic way to think about this is Denis's three-column model: the front of the vertebral body, the back of the body, and the bony arch and ligaments behind it. Break two of the three and the spine is generally called unstable. Modern scoring systems (TLICS for the thoracolumbar spine, SLIC for the neck) add in how the ligaments look on MRI and, crucially, whether the cord is injured. A cord injury pushes almost any borderline case toward surgery.

The Toolbox

Every spine operation, at every level, is built from the same handful of parts. Once you know them, an operative report stops being a foreign language.

Braces and traction (no surgery)

• Rigid cervical collars (Miami J, Aspen, Philadelphia) for stable neck injuries, and for 6–12 weeks after most neck fusions while the bone heals.
• Halo vest: a ring pinned to the skull, connected by uprights to a padded vest. The most rigid non-surgical option, used mostly for upper-cervical (C1–C2) fractures. Falling out of favor for people over about 65 because of complication rates.
• TLSO / CTO / CTLSO: molded plastic body jackets for the thoracic and lumbar spine (TLSO), with a chin-and-chest extension when the upper thoracic spine or neck is involved (CTO, CTLSO).
• Traction with Gardner-Wells tongs: pins in the skull with weights hung from them, used in the ER or ICU to pull a dislocated neck back into line before surgery.

Decompression procedures (making room for the cord)

• Laminectomy: removing the lamina, the bony roof of the spinal canal, from the back. The most basic way to make room.
• Discectomy: removing a damaged disc from between two vertebrae.
• Corpectomy: removing the whole vertebral body (the block of bone in front of the cord) and replacing it with a cage or strut of bone. Done when the body is shattered or when bone is pressing on the front of the cord.
• Foraminotomy: widening the small opening where a single nerve root exits.
• Laminoplasty: hinging the lamina open like a door and propping it, which decompresses without fusing. Used for chronic narrowing, rarely for unstable trauma.

Instrumentation (the hardware)

• Screws. Pedicle screws go through the pedicle, the thick stalk of bone behind the vertebral body, and are the workhorse of the thoracic and lumbar spine. In the neck, where pedicles are tiny and the vertebral artery runs alongside, surgeons mostly use shorter lateral mass screws (C3–C6), with pedicle or pars screws at C2 and C7. In the pelvis, iliac and S2-alar-iliac (S2AI) screws anchor a construct to the hip bones.
• Rods. Titanium or cobalt-chrome rods, usually one on each side, connect the screws and hold the alignment while the bone fuses. A cross-link is a small bar joining the two rods for extra rigidity.
• Plates. Used on the front of the neck (an anterior cervical plate) and sometimes on the side of the thoracolumbar spine.
• Cages and spacers. Hollow blocks of PEEK plastic, titanium, or donor bone placed where a disc or vertebral body used to be. They hold the space open and are packed with bone graft. Expandable cages are cranked open once inside.
• Hooks, wires, and cables. Older or supplemental ways to grab the lamina. Still used in some pediatric and deformity cases.

Bone graft (the actual fusion)

The hardware is scaffolding. The fusion is bone. Surgeons pack the construct with autograft (your own bone, often chips saved from the laminectomy or taken from the iliac crest of the pelvis), allograft (sterilized donor bone), and sometimes BMP (bone morphogenetic protein, a growth factor that speeds bone formation) or synthetic bone substitutes. Over 3–12 months this graft knits the vertebrae into a single block. If it does not, the result is a pseudarthrosis (a "false joint"), and the hardware eventually loosens or breaks because metal is not designed to carry the load forever.

Approaches

• Anterior (from the front): through the front of the neck for cervical work, through the chest or abdomen for the thoracolumbar spine.
• Posterior (from the back): the incision most people picture, straight down the midline.
• Lateral (from the side): used for some lumbar interbody fusions and thoracolumbar corpectomies.
• Combined / circumferential ("360°"): front and back, either in one long operation or on two days, for the most unstable injuries.
• Open vs. minimally invasive (MIS / percutaneous): the same screws and rods placed through small stab incisions under X-ray or navigation, with less muscle damage and blood loss. Common for thoracolumbar fractures; less so for long cervical constructs.

Operations by Region

Here is the whole menu in one place. Each row links to the deeper guide where the procedure is explained in full.

What Mine Looks Like: C2–C7

Because it is the construct I know from the inside, and because long posterior cervical fusions are common after cervical SCI, here is what "C2–C7 posterior instrumented fusion with two rods" actually means.

• The surgeon went in from the back of the neck, through a midline incision from the hairline to the top of the shoulders.
• At C3, C4, C5, and C6 the anchors are lateral mass screws, angled up and out into the small blocks of bone beside each facet joint.
• At C2 the anchor is usually a pars or pedicle screw, because C2 has a big, sturdy stalk of bone to aim for. At C7 it is often a pedicle screw for the same reason.
• Two titanium rods, roughly the diameter of a pencil lead, were bent to the shape of my neck and locked into every screw head with set screws. Some constructs add a cross-link between the rods.
• The facet joints and the roughened bone along the back of each level were packed with bone graft. The rods hold everything still so that graft can turn into a solid column of bone. My "fusion" today is that bone, not the metal.
• Mine also included a laminectomy at C3–C5 to decompress the cord, so the bony roof over those three levels is gone. The rods do the job the bony arch used to do.

What it costs in movement: C2–C7 locks the five segments that do most of the nodding and side-bending in the lower neck. It does not lock C1–C2, the joint that does about half of head rotation, so I can still turn my head further than people expect. Looking down at a plate or a phone, and checking a blind spot, are the things I do differently. The cervical guide goes deeper on what each fusion length costs.

What Happens After

The short version, with the full guide at Living With Spinal Hardware:

• Weeks 0–6: a collar or brace in most cases, wound care, and the start of rehab. Hardware holds you; bone has not yet.
• Months 3–6: X-rays or a CT to see the fusion forming. Restrictions on bending, lifting, and twisting ease as the bone proves itself.
• Months 6–12 and beyond: solid fusion in most people. The hardware stays in for life unless it causes a problem.

SCI adds twists that a typical fusion patient never deals with: bone below the injury thins fast, so screws can hold less well over time; skin over prominent hardware is a pressure-injury risk in a wheelchair; and years later a small number of people develop a Charcot spine below the fusion, a joint that breaks down because it cannot feel itself being overloaded.

The Risks, in Brief

Every one of these is covered in depth in the region guides. The headline list:

• Early: wound infection (higher risk after SCI: longer operations, pressure on the incision, urinary bacteria), bleeding, a spinal fluid (CSF) leak, blood clots, swallowing trouble after front-of-neck surgery, and C5 palsy (temporary shoulder weakness after posterior neck decompression, seen in roughly one in ten).
• Months: pseudarthrosis (the bone fails to fuse), screw loosening or pull-out, rod breakage, screws placed near a nerve or artery.
• Years: adjacent segment disease (the level above or below wears out faster), junctional kyphosis at the top of a long construct, hardware prominence and pain, Charcot spine.

Reading Your Operative Report

Ask for it. It is yours, and it is the single most useful document for understanding your own body. Some phrases you will see, decoded:

• "Posterior spinal instrumentation and fusion (PSIF) C2–C7": screws and rods from the back, five segments fused.
• "Lateral mass screws C3–C6, pars screws C2, pedicle screws C7, 3.5 mm titanium rods": exactly what was placed where. Rod diameters run about 3.5 mm in the neck and 5.5–6.0 mm in the thoracolumbar spine.
• "Decompressive laminectomy C4–C6": the bony roof was removed at those levels to free the cord.
• "ACDF C5–C6 with PEEK interbody cage and anterior plate": one disc removed from the front, a plastic spacer put in, a plate screwed over it.
• "C5 corpectomy with expandable cage, C4–C6 anterior plate": the whole C5 body removed and replaced.
• "T12 burst fracture, T10–L2 posterior instrumentation": screws two levels above and two below, the broken bone bridged.
• "Percutaneous pedicle screw fixation T11–L1": same idea, through small incisions, sometimes without a formal fusion.
• "L4–L5 TLIF": a cage put into the disc space from the back and side, with pedicle screws.
• "Lumbopelvic fixation L4–pelvis with S2AI screws": the low spine anchored to the hip bones.
• "Local autograft and allograft, rhBMP-2": the bone graft recipe.
• "Reduction" means a dislocation was put back in place. "Neuromonitoring" (SSEP/MEP) means nerve signals were tracked during surgery.

Questions to Ask Your Surgeon

• Which levels are fused, which were decompressed, and was the cord decompressed within 24 hours? If not, why not?
• What is the hardware made of (titanium, cobalt-chrome, PEEK), and is it MRI-conditional at 1.5T and 3T?
• Is this a fusion, or fixation without fusion that will be removed later?
• How will you confirm the fusion has healed, and when?
• What are my restrictions, for how long, and how do they apply to transfers and wheelchair pushing?
• What motion will I permanently lose, and what does that mean for driving and looking down?
• What signs mean the hardware is failing or the bone is not fusing?
• Will my bone loss below the injury affect the screws over time?

Sources & Further Reading

This page combines lived experience of a C2–C7 fusion with published guidance, including:

• An Update of a Clinical Practice Guideline for the Management of Patients With Acute Spinal Cord Injury: Recommendations on the Role and Timing of Decompressive Surgery (AO Spine / Praxis Spinal Cord Institute, Global Spine Journal, 2024)
• A Clinical Practice Guideline for the Management of Acute Spinal Cord Injury: Introduction, Rationale, and Scope (Fehlings et al., Global Spine Journal, 2017)
• Spinal Fusion and the Spinal Fusion Terms and Glossary (OrthoInfo, American Academy of Orthopaedic Surgeons)
• Denis Classification (StatPearls) and TLICS Classification of fractures (Radiology Assistant)
• AO Surgery Reference: Spine trauma (the surgeon-facing atlas of each procedure, by injury type)
• SCI Factsheets (Model Systems Knowledge Translation Center)

This is not medical advice. Spine surgery decisions depend on the exact fracture pattern, your neurological exam, your bone quality, and your overall health. The names and techniques here are to help you understand and question what your surgical team proposes, not to replace that conversation. Practice varies by surgeon and institution.