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21. 发明授权

US08603144B2 Adjustable bone screw assembly 有权
标题翻译：可调式骨螺钉组件
公开(公告)号：US08603144B2
公开(公告)日：2013-12-10
申请号：US13102166
申请日：2011-05-06
申请人： Seung Kyu Daniel Kwak , Nam T. Chao , Andrea Burke
发明人： Seung Kyu Daniel Kwak , Nam T. Chao , Andrea Burke
IPC分类号： A61B17/70
CPC分类号： A61B17/7001 , A61B17/7032 , A61B17/7037
摘要： A bone screw assembly includes a screw body, including anchor portion and rod-receiving portion, and a rod seat movably mounted in the screw body to allow for controlled angulation between a spinal connection element disposed in the rod seat and the screw body. The rod seat is pivotable in one or more selected directions about one or more axes relative to the screw body. The rod seat may include a first lower rod seat element disposed in a recess of the screw body having a cylindrical bottom surface to facilitate pivoting in a first direction. A second lower rod seat element is stacked on the first lower rod seat element and has a conical bottom surface abutting a top surface of the first lower rod seat element to facilitate pivoting in a second direction.
摘要翻译：骨螺钉组件包括螺钉体，其包括锚定部分和杆接收部分，以及可移动地安装在螺钉体中的杆座，以允许设置在杆座中的脊椎连接元件与螺钉体之间受到控制的角度。杆座可相对于螺钉体围绕一个或多个轴线在一个或多个选定方向上枢转。杆座可以包括设置在螺钉主体的凹部中的第一下杆座元件，其具有圆柱形底表面，以便于沿第一方向枢转。第二下杆座元件堆叠在第一下杆座元件上并且具有邻接第一下杆座元件的顶表面的锥形底表面，以便于沿第二方向枢转。

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