Patent ID: 8382811

Claim:
A pedicle screw assembly, comprising: a bone screw comprising a head portion and a thread portion, wherein the thread portion comprises an axial shaft and a triple lead thread disposed about the axial shaft, wherein the triple lead thread comprises three thread leads, wherein the axial shaft of the thread portion of the bone screw comprises a first tapering portion, wherein each of the three leads extend coextensively along at least a portion of the first tapering portion, wherein the axial shaft of the thread portion of the bone screw comprises a second tapering portion proximate a tip of the axial shaft of the thread portion of the bone screw, wherein each of the three leads extend coextensively along at least a portion of the second tapering portion, and wherein the second tapering portion tapers more steeply than the first tapering portion; and a rod retention member selectively coupled to the head portion of the bone screw.