Patent ID: 7186268
Filing Date: 2007-03-06
Classification: A61F

Abstract:
1. An intervertebral spacer device, comprising: a first baseplate having an outwardly facing surface and an inwardly facing surface, the inwardly facing surface having a central post secured thereto, the post having a longitudinal axis and a ball at a head end of the post that is inwardly directed toward the second baseplate, the ball defining a spherical contour; a second baseplate having an outwardly facing surface and an inwardly facing surface, the second baseplate including a convex structure integral therewith and a cap removably secured thereto, the convex structure and the cap together establishing a curvate socket communicating with a central bore through the convex structure, the curvate socket defining a spherical contour; wherein the ball is capturable in the curvate socket, with the curvate socket's spherical contour accommodating the ball's spherical contour for rotation and angulation of the ball in the curvate socket about a central portion of the ball; wherein the post extends through with the central bore of the second base plate thereby accommodating the post for rotation in the central bore about the longitudinal axis of the post as the ball rotates in the curvate socket, and accommodating the post for angulation in the central bore about the ball's central portion as the ball angulates in the curvate socket; a spring member positioned between the second baseplate and the cap such that a compressive load applied to the outwardly facing surfaces of the baseplates is borne by the spring member.