Load-sharing biomechanics of lumbar fixation and fusion with pedicle subtraction osteotomy.

ABSTRACT: Pedicle subtraction osteotomy (PSO) is an invasive surgical technique allowing the restoration of a well-balanced sagittal profile, however, the risks of pseudarthrosis and instrumentation breakage are still high. Literature studied primary stability and posterior instrumentation loads, neglecting the load shared by the anterior column, which is fundamental to promote fusion early after surgery. The study aimed at quantifying the load-sharing occurring after PSO procedure across the ventral spinal structures and the posterior instrumentation, as affected by simple bilateral fixation alone, with interbody cages adjacent to PSO level and supplementary accessory rods. Lumbar spine segments were loaded in vitro under flexion-extension, lateral bending, and torsion using an established spine te

SUBMITTER: La Barbera L 

PROVIDER: S-EPMC7878841 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature