Patent ID: 8992578
Filing Date: 2015-03-31
Classification: A61B,A61F

Abstract:
1. A spinal anchoring device, comprising: a bone screw having a threaded shank and a head with a flattened proximal surface; a receiver member having a protrusion formed on an inner surface of the opposed side walls at a location proximal to the head of the bone screw, the protrusion being configured to separate the spinal fixation element received by the U-shaped recess of the receiver member from the bone screw; and a fastening element matable to the proximal portion of the receiver member such that the fastening element is effective to lock the spinal fixation element in a fixed position relative to the receiver member with the spinal fixation element directly contacting an inner surface of the receiver member, the bone screw being freely movable relative to the receiver member when the spinal fixation element is locked in a fixed position relative to the receiver member by the fastening element.