Screw retaining system for maintaining position of screw relative to vertebral plate, has elastic member extending outward from opposing sections of cap in one of shapes, where member is positioned away from apertures in another shape.
Abstract:
A retention system for maintaining a screw to a vertebral plate is described herein. One or more screws extend through apertures within the vertebral plate. A cavity is positioned adjacent to and overlaps into the aperture. A ring is positioned within the cavity and held in position by a cap. The cap attaches to the plate to prevent removal of the ring. The ring is deflectable between a first shape to allow the screw to be inserted and removed from the aperture, and a second shape to prevent screw back-out from the aperture.
