Patent ID: 8002807
Filing Date: 2011-08-23
Classification: A61B

Abstract:
1. A dynamic screw assembly comprising: a fixation component that connects to a vertebral body, said fixation component comprising at least one inlet to allow a lubricant to pass inside said fixation component; a ring member coupled to said fixation component, wherein said ring member prevents said lubricant from leaking out of said fixation component; a stopper sealing said at least one inlet; a coupling member comprising an inwardly curved bottom portion and a bulbous end extending from said inwardly curved bottom portion, wherein said bulbous end comprises: a bumper mechanism coupled to said fixation component and said coupling member, wherein said bumper is shaped to coincide with said range of angulation; a longitudinal member coupled to said coupling member; and a blocker that retains said longitudinal member in said coupling member.