Abstract: A spinous process fixation device is provided. The spinous process device may include a transverse bridge member having a width that is perpendicular to a longitudinal axis, a first side plate that may be positioned at a first end of the transverse bridge and having at least one first grip projection, and a second side plate that may be positioned at a second end of the transverse bridge member and having at least one second grip projection. The first grip projection and the one second grip projection may each protrude towards the transverse bridge member.

Abstract: A surgical screw is provided for use in fixing or fusing bone. The screw may include each of an inner and an outer helical thread that extends along its length. The geometries of the helices and the relationship between the inner thread and the outer thread may improve the performance of the screw. For example, the two helices may operate to improve the manner in which the screw can be strained.