Lumbar interbody arthrodesis is a surgical technique that results in fusion of the anterior column of the spine. The indications for this procedure have evolved over time, and current indications include spinal deformity, segmental instability, and discogenic low back pain. Arthrodesis in the interbody space can be accomplished through anterior or posterior approaches to the spine, and these techniques are discussed. Surgical approaches in performing an interbody arthrodesis can be complicated by nerve and vascular injury. Clinical outcome studies are important in better defining the role of lumbar interbody arthrodesis as a substitute for posterior fusion in the lumbar spine.