Transpedicular (pedicle) screws gained wide popularity in the United States through the efforts of Steffee et al, and since the late 1980s, their indications and use have expanded substantially. Pedicle screws are anchored within the corticocancellous core of the vertebral pedicle. This anatomic region offers the strongest point of fixation within the spine and affords pedicle screws a biomechanical advantage over other instrumentation techniques such as hooks, wires, or anterior vertebral body screws.