Adult Spinal Deformity Correction

What it is and why we do it

Adult spinal deformity means a spine that has curved sideways (adult scoliosis), lost its natural inward curve in the low back (flat back), or both, usually from decades of disc and joint wear, sometimes on top of a curve from childhood or an earlier fusion. The problem is not the shape itself. It is what the shape does: when the spine no longer holds you upright on its own, the muscles of the back and hips work all day to compensate, and the result is back pain that worsens through the day, a forward lean that grows as you walk, and leg pain or numbness from nerves pinched inside the curve.

Most people with adult deformity are treated without surgery, with strengthening, walking, injections, and pain management. Surgery is for the person whose pain and function have failed those measures, whose imaging shows a deformity that explains the symptoms, and who is healthy enough for a large operation. When those line up, deformity correction can be one of the most life-changing operations in spine surgery, and I say that carefully, because it is also one of the largest.

What the operation does

The goal is to restore balance: a spine that stands upright with the head over the pelvis without effort, with the nerves free. Depending on the deformity, that involves some or all of these:

• Releasing the stiff levels, by removing worn discs from the front or side (ALIF or LLIF) and replacing them with wedge-shaped spacers that rebuild the low back's inward curve.
• Decompressing the nerves at the levels where they are pinched.
• Cutting and reshaping bone (an osteotomy) at one or more levels when the spine is too stiff to be realigned by releasing discs alone. A small osteotomy removes a sliver of bone at the back of the spine; a larger one removes a wedge through the body of a vertebra to correct a sharp kyphosis.
• Instrumenting and fusing the corrected levels with screws and rods, often extending to the pelvis to anchor the construct.

Why it is often done in stages

A large correction is frequently done as two operations a day or a few days apart: a front or side approach first to release and rebuild the discs, then a back approach to realign, instrument, and fuse. Splitting the work shortens each anesthetic, reduces blood loss per operation, and lets me correct the alignment more precisely at the second stage. You stay in the hospital between stages.

Preparing for it

This is the surgery where preparation matters most, and I will not schedule it until the preparation is done. Bone density is tested and treated, often with a bone-building medicine for three months before surgery, because the screws hold only as well as the bone around them. Nutrition, blood sugar, and heart and lung function are checked. Nicotine must be gone. A course of physical therapy before surgery makes the recovery easier. My pre-op playbook walks through all of it.

Recovery

Expect a hospital stay of about a week, sometimes with a short stay in a rehabilitation unit afterward. Walking begins within a day or two of the final stage. The first six weeks are hard; the next six are better; by three to six months most people are walking and standing in a way they had not managed for years. The fusion matures over a year. I follow you closely through that time, with X-rays that check the alignment and the fusion, and with the restrictions in my post-op playbook for lumbar fusion.

The honest trade-offs

Deformity surgery carries more risk than any other elective spine operation, and I would rather you hear it from me: infection, blood loss needing transfusion, nerve injury, a fusion that fails to heal, hardware that loosens, and a new problem at the top of the fusion called proximal junctional kyphosis, where the spine above the construct tips forward. Published complication rates are high, and the chance of needing another operation within a few years is real. Against that is the fact that patients who get through it report some of the largest improvements in pain and function measured anywhere in spine surgery. The decision is yours, made with full information, and I will be honest about whether you are a good candidate.

The science: for the curious

The body can tolerate a sideways curve surprisingly well. What it cannot tolerate is being pitched forward: when the center of the head falls in front of the hips, the muscles and hip joints work constantly to hold you up, and that effort is what hurts. That is why modern deformity surgery is planned around the side view, measuring how far forward the spine sits and how much inward curve the low back needs for your pelvis, and why restoring lordosis matters more than straightening the sideways curve. Techniques that lower the risk, including staged front-and-back surgery, bone-strengthening medicines before surgery, and careful choices about where the fusion ends, have measurably improved results over the past decade.

Learn more

Scoliosis Research Society, Adult Scoliosis: srs.org (opens in a new tab)

My guides to degenerative scoliosis, adult idiopathic scoliosis, ALIF, and LLIF.

This handout is general education about this procedure and does not replace the specific plan, risks, and consent discussion we have together. Your own situation may differ: if anything here does not match what we talked about, what we talked about wins, so please ask me.