Spinal fusion is a surgical procedure that joins two or more vertebrae to eliminate painful motion and provide long-term spinal stability. It is commonly used to treat conditions like degenerative disc disease, scoliosis, or spinal fractures. By fusing the affected vertebrae with bone grafts and implants, the surgery helps relieve chronic back pain and restore alignment. Spinal fusion may be performed using open or minimally invasive techniques, depending on the condition and overall patient health.