Anterior lumbar interbody fusion is a surgical procedure used to treat problems related to disc degeneration, spinal instability, and deformities of the spine. In this procedure, the surgeon works on the spine from the front (anterior) and removes a spinal disc in the lower (lumbar) spine. The surgeon inserts bone graft into the space between the two vertebrae where the disc was removed. (In selected cases an artificial disc can be used instead.) The goal of type of procedure is to reduce back pain and lower limb symptoms.