Patent ID: 9084634
Filing Date: 2015-07-21
Classification: A61B

Abstract:
1. A spinal screw apparatus, comprising: a screw shaft and a screw head fixedly attached with said screw shaft, wherein said screw head comprises a portion of a sphere, wherein said screw shaft has a longitudinal axis; and a movable head comprising a top portion and a bottom portion and a concave interior larger than said screw head, and being movable with respect to said screw head, said movable head having a through-passageway, said movable head having a U-trough through said top portion, wherein said U-trough includes a U-trough axis; wherein said through-passageway is bounded by an interior wall, wherein a first portion of said interior wall intersects with a first planar bottom surface of said movable head at a first edge portion that is a portion of a circular arc, and a second portion of said interior wall intersects with a second planar bottom surface of said movable head at a single second edge portion that is a straight line.