Patent ID: 9017409
Filing Date: 2015-04-28
Classification: A61B,A61F

Abstract:
1. An intervertebral implant system comprising: a spinal spacer for engagement between vertebrae, the spinal spacer including a body having a first end surface at a distal end of the body and a second end surface opposite thereto at a proximal end of the body, the body extending between the first and second end surfaces to define opposing top and bottom vertebral engaging surfaces substantially symmetrical about a centerline axis, the body further defining side surfaces, a hollow inner body defined by an opening extending through the top and bottom vertebral engaging surfaces, the second end surface of the body including an aperture formed therethrough at an angle relative to the centerline axis and in communication with the hollow inner body, and a plate insert having a screw opening defined therethrough and configured to be mounted to the body with the screw opening substantially aligned with the aperture, wherein the plate insert is configured with a lip disposed in the screw opening configured to engage threads of a bone screw inserted therethrough; and a semi-constrained bone screw adapted for insertion through the screw opening of the plate insert, the semi-constrained bone screw including a shank having a proximal surface, the shank defining a lumen extending partially therethrough from a proximal end toward a closed distal end, the lumen defining a uniform diameter along a majority of it's length thereof, a head having a distal surface, the head defining a lumen therethrough and including a threaded portion configured to engage the lip of the screw opening, and a rod member configured for insertion through the lumen of the head and into the lumen of the shank, the rod member being fixedly engageable with the shank and moveably coupled to the head such that both the rod member and the shank are moveable with respect to the head, wherein movement of the rod member and the shank when engaged with each other is limited by abutment of the proximal surface of the shank with the distal surface of the head.