The pain caused by the dysfunction of the SI joint is frequently confused with pain caused by problems of the lumbar spine. If testing determines that it is probable that the SI Joint is the source of pain, the doctor may then choose one of a few techniques. Primarily he or she will administer injections directly into the SI Joint to temporarily control discomfort. If these methods fail to manage your symptoms, ask your doctor about OneSurg SI Fusion. The FuNu Allograft Fusion Implant is a minimally invasive surgical procedure that aims to fuse the SI Joint. The procedure can typically be performed through a single incision. Fusion restricts the movement of the SI joint, alleviating the painful side effects of SI Joint dysfunction.