SImmetry® SI Joint Fusion System

The SImmetry system is a minimally invasive SI joint fusion system that uses proven orthopedic principles, including joint decortication, bone grafting and fixation, to achieve true arthrodesis.

Regulatory approvals vary by country. Therefore, we kindly ask you to contact the distributor in your region regarding availability of specific products, implants and / or instrumentation in your region.
  • Minimally invasive surgery using the SImmetry system typically takes less than one hour to perform, has fewer postoperative complications than open SI joint fusion surgery and involves:

    • < 50cc estimated blood loss1
    • A small incision—typically only a couple centimeters—on one side of the buttock2
    • Brief hospital stay3
    • Potential for short weight-bearing recovery period based on sacroiliac joint fusion postoperative guidelines4
    • True SI joint arthrodesis5


    The SImmetry system affords an efficient and effective minimally invasive technique to effect a true arthrodesis of the sacroiliac joint as follows:

    • Minimally invasive lateral access for safety and control
    • Joint preparation with the proprietary SImmetry Decorticator® instrument removes cartilage and decorticates opposing joint surfaces
    • Bone graft delivery to the prepared joint to facilitate fusion
    • Joint fixation with threaded titanium implants


    1 Araghi A, et. al. Pain and opioid use outcomes following minimally invasive sacroiliac joint fusion with decortication and bone grafting: The Evolusion Clinical TrialThe Open Orthopaedics Journal, 2017, 11, 1440-1448
    2 Miller L, et. al. Minimally invasive arthrodesis for chronic sacroiliac joint dysfunction using the SImmetry SI Joint Fusion system: Dove Press. Medical Devices: Evidence and Research, May 7, 2014
    3 Kube R, et. al. Sacroiliac joint fusion: One year clinical and radiographic results following minimally invasive sacroiliac joint fusion surgery: The Open Orthopaedics Journal, 2016, 10, 679-689
    4 Dall, B. Post-operative guidelines for sacroiliac joint fusion. Published White Paper
    5 Cross W, et. al. Evaluation of fusion after minimally invasive sacroiliac joint fusion surgery with decortication: 24-month results. International Society for the Advancement of Spine Surgery. Annual Meeting, April 2017