Lumbar Fusion


Sarah Lewis, PharmD

What is lumbar fusion?

Lumbar fusion is the surgical joining of two vertebrae in the lumbar spine, or lower back. Your vertebrae are the bones that make up your spine (backbone). Lumbar fusion permanently stops movement between two vertebrae. It is a treatment for a variety of diseases and conditions of your spine.

Most spinal fusions use a bone graft to fuse or join two vertebrae. Your doctor may also use screws, rods or plates to hold your vertebrae in place. Lumbar fusion can potentially help decrease pain and maintain function in a damaged or diseased lumbar spine.

Lumbar fusion is a common, somewhat controversial surgery with serious risks and potential complications. You may have less invasive treatment options. Consider getting a second opinion about all your treatment choices before having a lumbar fusion. 

Types of lumbar fusion

Lumbar fusion procedures generally use bone graft material. This involves placing bone graft material in strips along your vertebrae, in pieces between your vertebrae, or packed into a special cage that goes between your vertebrae. Your body heals the bone around the graft over a period of several months. 

Spinal fusion is not immediate with surgery. It takes time for your body to form enough bone around the graft to permanently fuse your vertebrae.

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The types of lumbar fusion procedures include:

  • Allograft fusion uses a piece of cadaver bone for the bone graft. Allografts come from a bone bank. Allograft fusions require only one incision and cause less pain than an autograft fusion. However, bone fusion and healing is less predictable with an allograft.

  • Autograft fusion uses a piece of your own bone for the bone graft. Your doctor will usually take bone from your pelvis. This type of lumbar fusion was the only option available in the past. However, an autograft requires an additional incision, lengthens surgery time, and causes more post-operative pain. 

  • Synthetic, or artificial graft fusion uses synthetic (totally man-made) materials and modified natural