ABSTRACT
Pedicle screw fixation has become one the most widely used fixation methods in modern spinal surgery. This is due in part to the superior mechanical properties of the pedicle screw, which provides the strongest fixation site in most situations. When correctly placed, pedicle screws avoid encroachment into the spinal canal and thus prevent neural irritation. Pedicle screws are an integral component of rigid internal fixation that allows early mobilization without external bracing. Pedicle screws can be used in regions of the spine following laminectomy where wire and sublaminar hook constructs may not be used. Finally, pedicle fixation has successfully been employed over the entire spine and in a wide variety of pathological conditions, making the pedicle screw a very flexible form of internal fixation. When compared with hooks, pedicle screws offer enhanced three-dimensional correction of deformities and can be used to preserve motion segments.
