Anterior Lumbar Fusion Procedure, Anatomical View

Description

Anterior lumbar interbody fusion (ALIF) hardware occupies the anterior aspect of two adjacent lumbar vertebral bodies, bridging the intervertebral disc space with a spinal cage seated between the endplates. A metallic plate and fixation screws anchor into the vertebral bodies on the anterior surface, aligned along the midline with symmetrical purchase on the left and right of the anterior longitudinal ligament region. Superior and inferior vertebral endplates frame the cage, and the construct spans proximodistally across the motion segment to restore disc height and segmental lordosis. Bone is prominent; soft tissues are minimized. ALIF matters when you need anterior column support without posterior muscle dissection, but the approach places major vascular structures directly anterior to the lumbar spine, so orientation to the midline and implant footprint is not academic. The illustration supports teaching and case planning around L4 to L5 and L5 to S1 fusion, where the left common iliac vein, bifurcation of the aorta, and the superior hypogastric plexus can constrain exposure and influence plate position, cage size, and screw trajectory. Subsidence, endplate violation, and implant malposition are common discussion points. Small margins. Use this illustration in spine surgery atlases, orthopedic and neurosurgical resident lectures, device education decks, and consent materials that need a fixed anterior anatomical view of lumbar fusion hardware and spinal cage placement. Anatomical accuracy verified by SciePro's Medical Advisory Board.