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1. 发明授权

US5910142A Polyaxial pedicle screw having a rod clamping split ferrule coupling element 有权
标题翻译：多轴椎弓根螺钉，其具有杆夹紧分离套圈联接元件
公开(公告)号：US5910142A
公开(公告)日：1999-06-08
申请号：US174962
申请日：1998-10-19
申请人： Stephen Tatar
发明人： Stephen Tatar
IPC分类号： A61B17/70
CPC分类号： A61B17/7037 , A61B17/704 , A61B17/7032
摘要： A polyaxial pedicle screw device for use with rod implant apparatus, which utilizes a rod mounted ferrule, includes a screw having a curvate head and a rod receiving body. The body has a rod receiving channel and an axial bore into which the head of the screw is inserted. The interior surface of the bore is inwardly curvate at the lower end thereof to form a socket for polyaxially retaining the curvate head of the screw. In an initial position the screw head remains polyaxially free with respect to the body. The rod mounted ferrule seats into a small curvate recess in the upper portion of the screw head such that the rod may enter the body at a variety of angles while maintaining a secure seating against the head of the screw. The insertion of a top set screw compresses down on the ferrule, locking the rod in position, and onto the screw head, locking it and the body in position, thus completely securing the assembly.
摘要翻译：一种用于杆植入装置的多轴椎弓根螺钉装置，其利用杆安装的套圈，包括具有弯曲头部和杆接收体的螺钉。主体具有杆接收通道和轴向孔，螺钉的头部插入其中。孔的内表面在其下端处向内弯曲，以形成用于多重保持螺钉的头枕头的插座。在初始位置，螺钉头相对于主体保持多轴无关。杆安装的套圈位于螺钉头部上部的小弯曲凹槽中，使得杆可以以各种角度进入身体，同时保持抵靠螺钉头部的牢固的座位。顶部固定螺钉的插入压缩在套圈上，将杆锁定在适当位置，并将其锁定到螺钉头上，将其锁定并将本体固定就位，从而完全固定组件。

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