Biomechanics of Thoracic Pedicle Screw Fixation. Part I: Screw Biomechanics

摘要

Since the early 1980s, bone screws placed through the pedicle have become an increasingly common method of fixation for the treatment of spinal deformity, degenerative disease, trauma, and tumors. Fusion with pedicle screw instrumentation has been shown to be more successful as pedicle screw fixation provides more rigid fixation than hooks or sublaminar wires.Despite the advantages of pedicle screw systems, screw failure such as screw breakage, loosening, pullout, and migration can still be problematic.