Sacroiliac (SI) Joint Fusion is a surgical procedure designed to treat chronic pain in the lower back and pelvis caused by SI joint dysfunction. The SI joint, which connects the spine to the pelvis, can become unstable or arthritic, leading to significant pain and limited mobility. During the fusion, small implants or screws are inserted to stabilize the joint, allowing the bones to fuse together over time, reducing motion and relieving pain. This minimally invasive procedure is often recommended when conservative treatments like physical therapy or injections have failed to provide relief.