Patent ID: 9592081
Date: 2017-03-14
CPC Classifications: A61B,F16B

Claim:
1. A spinal stabilization system for transfixing a motion segment of a spine comprising: a pair of translaminar screws configured for insertion into facet joints of the motion segment, each screw comprising a shaft and a head region extending from the shaft, the head region having a smooth, arcuate underside; and a pair of captive washers configured for use with the translaminar screws, each washer comprising a first upper plate and a second complementary shaped lower plate, each of the plates including a central opening for receiving the shaft of the screw to capture the head region of the screw therein, wherein the first and second plates each have a spherical contour that complements the smooth, arcuate underside head region such that the head region of the screw can be seated against, and slidingly move with respect to, the plates.