MIS SIJ Fusion

MIS SIJ Fusion

The sacroiliac joint, also known as the SI joint is located in the pelvis linking the iliac bones to the sacrum. The SI joint aids in the energy transfer between the torso and legs. When damage occurs to the SI joint, it will cause pain in the buttocks, hips, pelvis, groin, lower back, and legs. Typically activities such as lifting, running, walking, or sitting to standing transitions will cause aggravation. 

If you are experiencing the following symptoms, you may have issues with your SI joint. 

  • Leg instability (buckling) 
  • Numbness, tingling, or pain in the lower extremities
  • Loss of sleep due to pain 
  • Unable to sit for long periods of time


The doctors at Austin Sports Medicine will decide whether you are a candidate for an MIS-SI joint fusion with a variety of tests performed during a physical exam, typically using X-rays, CT-scans, or MRIs.


A sacroiliac joint fixation is a surgical procedure that permanently returns the joint to its intended position, restoring weight-bearing functions. Three to four small titanium implants are inserted across the sacroiliac joint with the intention of stabilizing it. This minimally-invasive procedure takes about an hour and is done through a small incision.

To learn more about the MIS SIJ Fusion Procedure at Austin Sports Medicine, please contact us today at 512-450-1300

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