公开(公告)号：EP2117451A1

公开(公告)日：2009-11-18

申请号：EP07865140.3

申请日：2007-12-04

申请人： Zimmer Spine Austin, Inc.

发明人： ELY, Kameron Scott ,  DAVIS, Melissa

IPC分类号： A61B17/70 ,  A61B17/86

CPC分类号： A61B17/7037 ,  A61B17/7032 ,  A61B17/7038 ,  A61B17/8605

摘要： A spinal stabilization system includes bone fastener assemblies to be coupled to vertebrae. Each bone fastener assembly includes a bone fastener (100) and a collar (200). The bone fastener has a head portion (102) having at least a first cross-sectional shape in a first plane, and a second cross-sectional shape in a second plane. The collar has a circular opening (210) in the bottom, with a relief (212) extending from the circular opening. The second cross-sectional shape of the bone fastener is keyed to the opening to permit insertion of the bone fastener into the collar assembly, from the bottom. After insertion, the bone fastener is rotated to prohibit removal of the bone fastener from the collar. The collar can then be rotated and/or angulated relative to the bone fastener. An elongated member can be positioned in the collar and a closure member is then used to secure the elongated member to the collar.