Anatomical Result Of A Lumbar Fusion

Description

Posterior lumbar vertebrae appear as an arthrodesed segment, with pedicle screws anchored in the right and left pedicles and connected by longitudinal rods spanning two adjacent vertebral levels. Across the intervertebral space, an interbody graft or cage occupies the disc position, sitting between the inferior endplate of the superior vertebra and the superior endplate of the inferior vertebra to maintain height and promote bony union. Posterolateral graft material bridges toward the transverse processes and facet complexes, with the laminae and spinous processes forming the midline posterior elements. Lumbar fusion remains a standard operative solution for symptomatic instability from degenerative spondylolisthesis, recurrent disc pathology with segmental collapse, or deformity requiring stabilization after decompression. Hardware positioning matters. Screw trajectory relative to the pedicle walls and the proximity of the construct to the neural canal and foraminal boundaries are the details surgeons and trainees scrutinize when correlating postoperative radiographs and CT with new radicular pain, screw loosening, or adjacent segment disease. The fixed lighting and solid bony textures make the distinction between cortical bone, cancellous bone, metal instrumentation, and grafted material easy to parse at a glance. Use this illustration in spine surgery lectures to explain instrumented posterior fusion versus interbody support, and in anatomy or orthopedics courses when teaching posterior element landmarks (pedicle, pars interarticularis, superior and inferior articular processes) that guide safe screw placement. It also fits postoperative patient-education materials and textbook figures covering lumbar arthrodesis, pseudarthrosis, and hardware failure patterns. Anatomical accuracy verified by SciePro's Medical Advisory Board.