Spinal arthrodesis is a generally accepted procedure for the management of patients with a variety of spinal disor- ders. The primary goal for spinal fusion is to eliminate the instability of the spine, often caused by trauma, deformity, tumor, inflammation or infection, and common degenera- tive deterioration of the motion segments. In many clini- FRA paw', cal situations, the optimal solution in restoring the spine's integrity is through surgical intervention. There are many techniques of spinal fusion applicable to the lumbar spine. Posterior (PLIF) and anterior lumbar interbody fusion...