A pedicle screw assembly, including a bone screw having a head portion and a thread portion, wherein the thread portion includes an axial shaft and a triple lead thread disposed about the axial shaft, and a rod retention member selectively coupled to the head portion of the bone screw Optionally, the triple lead thread includes leads that originate at different points along the axial shaft Optionally, the triple lead thread includes leads that terminate at different points along the axial shaft Optionally, the axial shaft includes a first tapering portion proximate a tip of the axial shaft Optionally, the axial shaft includes a second tapering portion proximate the tip of the axial shaft Preferably, the second tapering portion tapers more steeply than the first tapering portion Optionally, the axial shaft includes a reduced diameter portion or one more tapering portions proximate the head portion.
