Opening early 2027

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Institute of Function

Treatments · Long Island, NY

Minimally Invasive SI Joint Fusion
Stabilize the sacroiliac joint through a small posterior approach.

At a glance

Sacroiliac (SI) joint pain causes low back and buttock pain that can feel like sciatica. When the SI joint is confirmed as the source with an exam and diagnostic injections, and pain persists despite rehabilitation and injections, a minimally invasive fusion can stabilize the joint. In the posterior approach, a bone allograft implant (such as the LinQ system) is placed into the joint through a small incision under X-ray guidance. Dr. Benjamin (Ben) Klyachman, D.O., board-certified in pain medicine and physical medicine and rehabilitation, leads care at Institute of Function in Nassau County, NY, which welcomes patients from across Long Island, New York City and beyond.

Institute of Function opens in Nassau County, NY in early 2027. Every procedure follows a diagnosis-first assessment and is never guaranteed.

Medically reviewed by Dr. Ben Klyachman, D.O. · Updated October 25, 2026

Confirming the source

Provocation tests on exam and diagnostic SI joint injections that bring clear short-term relief help confirm the SI joint as the pain generator before any fusion.

How it works

Through a small incision in the low back and under X-ray guidance, the joint is prepared and a bone allograft implant is placed to promote fusion. It is an outpatient procedure for most patients.

Evidence

Prospective studies of posterior SI joint fusion report improvements in pain and function. The evidence base is growing but is smaller than for some lateral-approach implants, and we discuss the options and evidence openly.

Risks

Risks include incomplete fusion, persistent pain, infection, bleeding and, rarely, nerve irritation.

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This page is general information, not medical advice. Individual results vary. Medical Disclaimer

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