Spinal fusion surgery, step by step

What actually happens in the operating room, what the hardware is, and how much of daily life changes depending on how much of the spine is fused.

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Part one

Inside the operation

The picture builds up the same way the operation does. Step through it to see each layer added, from positioning to closing.

Side view of four spinal levels during fusion surgery, with the front of the spine on the left and the surgeon’s approach from the right. An inset panel shows body position, a cross-section, and the whole spine straightening.
1

What you experience

Part two

Explore which levels are fused

Choose the first and last vertebra in an example fusion. T means thoracic (mid-back), L means lumbar (lower back), and S1 is the top of the sacrum. The highlighted levels show the selected span.

Spine column showing which levels are instrumented

This counts unfused joints from L1 to S1; it is not a percentage of flexibility. These joints contribute different amounts of movement. Reaching S1 does not by itself mean that fixation extends into the pelvis.

Construct

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Vertebrae

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Joints fused

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Unfused lumbar joints

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Planning daily activities

Discuss return May need adaptation Individual guidance

Examples for a conversation with your care team, not predictions or clearance for activity. Recovery, hip mobility, strength, and other conditions also matter.

    Risks to discuss with your surgeon

    Recovery timeline

    Patient overview: AAOS: spinal fusion

    Bone health is part of fusion planning. Ask your team whether you need a bone-health assessment before surgery. If a fusion is on the table for you, how to strengthen the bone beforehand is worth reading first — it is part of the operation, not an afterthought.