Derotation Apparatus for treating spinal irregularities

摘要

Treatment of spinal irregularities, including, in one or more embodiments, derotation apparatus and systems that can be used to reduce the rotation of vertebral bodies. Derotation apparatus that may comprise a tube assembly comprising an inner sleeve and an outer sleeve disposed over the inner sleeve. The inner sleeve may have a distal end for attachment to an implant. The tube assembly may further comprise a handle assembly. The tube assembly may further comprise a ball joint assembly disposed between the tube assembly and the handle assembly. The ball joint assembly may comprise a ball joint configured for attachment to a coupling rod.

主权项

1. An apparatus for treating spinal irregularities, comprising:
a derotation apparatus comprising:
a tube assembly comprising an inner sleeve and an outer sleeve disposed over the inner sleeve, wherein the inner sleeve has a distal end for attachment to an implant;a handle assembly; anda ball joint assembly disposed between the tube assembly and the handle assembly, wherein the ball joint assembly comprises:
a ball joint configured for attachment to a coupling rod, wherein the ball joint comprises an upper portion and a lower portion that match together to form a rotatable ball;an outer washer having a serrated surface configured to prevent rotation of the ball by engaging an outer surface of the ball when the ball joint is in a locked position; andan inner washer fit within the outer washer and having a protruding rim with a smooth surface, and wherein the protruding rim is configured to extend through the outer washer to engage an outer surface of the ball without preventing rotation of the ball when the ball joint is in an unlocked position.