Gary S. Lindemann,Larry Gause,Robert A. Farris,Regis W. Haid, Jr.,Stephen Papadopoulos,Rick Sasso,Volker Sonntag,Vincent C. Traynelis,Iain Kalfas
申请号：
US12777934
公开号：
US08672984B2
申请日:
2010.05.11
申请国别(地区):
US
年份:
2014
代理人:
摘要：
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.
