SI Joint Fusion
Sacroiliac (SI) joint fusion is a minimally invasive procedure designed to stabilize the sacroiliac joint and relieve chronic pain caused by SI joint dysfunction. Through a small incision, your surgeon uses specialized implants, such as screws or triangular dowels, to stabilize the joint while encouraging the sacrum and ilium to fuse together over time. The procedure is performed using advanced image guidance to ensure precise implant placement while minimizing disruption to the surrounding muscles and tissues. For many patients, SI joint fusion can reduce pain, improve stability, and help restore everyday function when conservative treatments have not provided lasting relief.
Who Is a Candidate?
SI joint fusion may be recommended for patients with chronic sacroiliac (SI) joint pain that has not improved with conservative treatments such as physical therapy, medications, or other non-surgical options. Before surgery is considered, patients typically undergo diagnostic SI joint injections to confirm that the SI joint is the source of their pain.
Common conditions that may be treated with SI joint fusion include:
SI joint arthritis
Degenerative sacroiliitis
SI joint instability following trauma
Persistent SI joint pain after lumbar fusion surgery
Certain inflammatory conditions affecting the SI joint
Sacral insufficiency fractures
Adjacent segment disease following spine surgery
Benefits
SI joint fusion offers several potential benefits for patients experiencing chronic sacroiliac joint pain, including:
Minimally invasive procedure performed through a small incision
Less blood loss and reduced disruption to surrounding muscles and tissues
Improved stability of the sacroiliac joint
Reduced pain for many patients
Improved mobility and daily function
Faster recovery compared to traditional open surgery for many patients
Road to Recovery
Recovery after SI joint fusion is gradual and designed to support proper healing of the joint. Most patients return home the same day or after a short hospital stay. During the initial recovery period, weight-bearing on the treated side may be limited, and your surgeon may recommend using a walker or other assistive device. Physical therapy is often introduced after the initial healing phase to help restore strength, flexibility, and normal movement.
What to Expect During Recovery
Same-day discharge or a short hospital stay for most patients
Temporary use of a walker or assistive device may be recommended
Physical therapy may begin after the initial healing period
Light daily activities may resume within 2–4 weeks
Complete healing and joint fusion typically occurs within 3–6 months
Ready to Take the Next Step?
Whether you're seeking a second opinion or exploring treatment options, our fellowship-trained spine specialists are here to help. Schedule a consultation to discuss your symptoms and learn about the treatment options that are right for you.