A closure for an open ended medical implant with a pair of spaced arms to maintain a rod or the like in the implant. The closure including a top plate with depending side flanges forming a discontinuous ring that is received about the implant in comparatively low profile from side to side. The closure...http://www.google.com/patents/US6440132?utm_source=gb-gplus-sharePatent US6440132 - Open head bone screw closure with threaded boss
