基本信息:
- 专利标题： POLYAXIAL BONE SCREW WITH MULTI-PART SHANK RETAINER
- 专利标题（中）：多轴保持架多轴螺丝
- 申请号：PCT/US2006/022111 申请日：2006-06-07
- 公开(公告)号：WO2009014508A1 公开(公告)日：2009-01-29
- 发明人： JACKSON, Roger, P.
- 申请人： JACKSON, Roger, P.
- 申请人地址： 2750 Clay Edwards Drive Suite 600 North Kansas City, MO 64116-3250 US
- 专利权人： JACKSON, Roger, P.
- 当前专利权人： JACKSON, Roger, P.
- 当前专利权人地址： 2750 Clay Edwards Drive Suite 600 North Kansas City, MO 64116-3250 US
- 代理机构： MCMAHON, John, C.
- 优先权： US11/281,818 20051117
- 主分类号： A61F2/30
- IPC分类号： A61F2/30
摘要：
A polyaxial bone screw assembly includes a threaded shank body having an upper capture structure, a head and a multi-piece retainer, articulation structure. The geometry of the retainer structure pieces corresponds and cooperates with the external geometry of the capture structure to frictionally envelope the retainer structure between the capture structure and an internal surface defining a cavity of the head. The head has a U-shaped cradle defining a channel for receiving a spinal fixation or stabilization longitudinal connecting member. The head channel communicates with the cavity and further with a restrictive opening that receives retainer pieces and the capture structure into the head but prevents passage of frictionally engaged retainer and capture structures out of the head. The retainer structure includes a substantially spherical surface that mates with the internal surface of the head, providing a ball joint, enabling the head to be disposed at an angle relative to the shank body. Methods of installation are also provided.
摘要（中）：
多轴骨螺钉组件包括具有上捕获结构的螺纹柄体，头部和多片保持器，铰接结构。 保持器结构件的几何形状对应并与捕获结构的外部几何形状配合，以摩擦地包围捕获结构和限定头部空腔的内表面之间的保持器结构。 头部具有U形支架，其定义用于接收脊柱固定或稳定纵向连接构件的通道。 头部通道与空腔连通并且还具有限制开口，其将保持器片和捕获结构接收到头部中，但是防止摩擦接合的保持器的通过并将结构捕获到头部外。 保持器结构包括与头部的内表面配合的基本上球形的表面，提供球接头，使头部能够相对于柄体以一定角度设置。 还提供了安装方法。