SI Joint Fusion
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SI Joint Fusion


Your sacroiliac joints connect your hip bones to either side of your sacrum (tail bone). It is an essential component for shock absorption to prevent impact forces from reaching the spine. When problems in that area occur, it can cause significant low back pain, and sometimes pain in the buttocks and legs. Degenerative joint issues, traumatic injury, or inflammatory joint disease are the most common reasons SI joint fusion may be recommended.


Sacroiliac (SI) joint fusion is a minimally invasive surgical option performed to provide immediate sacroiliac joint stabilization and allow long-term fusion.


Like any other joint in the body, the SI joint can be injured or become degenerative. When this happens, people can feel pain in their buttocks and sometimes in the lower back and legs. This is especially true while lifting, running, walking, or even sleeping on the involved side.

  • Lower back pain
  • Sensation of low extremity: pain, numbness, tingling, weakness
  • Pelvis/buttock pain
  • Hip/groin pain
  • Feeling of leg instability (buckling, giving way)
  • Disturbed sleep patterns due to pain
  • Disturbed sitting patterns (unable to sit for long periods, sitting on one side)
  • Pain going from sitting to standing

The Procedure

The iFuse Implant System® manufactured by SI-BONE®, Inc. is a minimally invasive surgical SI joint treatment option that provides stabilization and fusion of the SI joint for some causes of SI joint pain. This is accomplished by inserting triangular-shaped titanium implants across the joint to maximize post-surgical stability and weight-bearing capacity. The procedure is done through a small incision and takes about an hour. SI joint treatment using the patented triangular design of the iFuse Implant™ has produced unparalleled clinical results.


Fusion occurs during the healing process following the surgery.