In August 2011 the U.S. FDA has approved the SImmetry™ Sacroiliac Joint Fusion System for sacroiliac joint fusion for conditions including sacroiliac joint disruptions and degenerative sacroiliitis. "We are very pleased that the FDA approved the updated indications for use for SImmetry.  We believe performing a true, intra-articular arthrodesis of the SI joint provides the best pathway to a successful fusion and a successful patient outcome. The updated indications for use reflect the clinical intent of the SImmetry system," said Robert Assell, President and CEO of Zyga Technology, Inc.
Sacroiliac joint dysfunction can be the source of pain for up to 25% of patients suffering from low back pain. Sacroiliac joint dysfunction can cause SI joint pain and is typically characterized by sacroiliac ligament pain, lower back pain, buttock pain, or pain in one or both legs.  Patients who suffer from this condition typically receive SI Joint injections which temporarily address the problem but require long-term repeat treatments.  Traditional, open fusion of the SI joint has been performed for decades but is limited in practice due to its complexity, high complication rate and generally poor outcomes.