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    • 5. 发明授权
    • Variable angle spinal screw assembly
    • 可变角度脊椎螺钉组件
    • US07377923B2
    • 2008-05-27
    • US10848946
    • 2004-05-19
    • Thomas PurcellDon HairTamas T. Frech
    • Thomas PurcellDon HairTamas T. Frech
    • A61B17/70
    • A61B17/7037A61B17/7032A61B17/7038
    • A spinal screw assembly providing an adjustable securement of a fixation rod across at least two vertebrae. The assembly includes a pedicle screw having a spherical head portion, a threaded shaft portion and a tool engagement surface in the head portion for use in driving the screw into a vertebrae. The head portion of the screw is positioned in a body member adjacent a curvilinear surface disposed about an aperture in the end of the body member such that the shaft portion of the screw extends therethrough and the curvilinear inner surface abuts and mates with the head portion of the screw so as to define a ball joint therewith. The body member additionally defines a pair of opposed parallel slots therein adapted to receive a portion of the fixation rod and a locking cap bears against the fixation rod to releasably secure the rod within the assembly.
    • 脊椎螺钉组件,其提供固定杆穿过至少两个椎骨的可调节固定。 组件包括具有球形头部,螺纹轴部分和头部中的工具接合表面的椎弓根螺钉,用于将螺钉驱动到椎骨中。 螺钉的头部位于身体部件中,邻近设置在主体部件的端部周围的孔的曲线表面,使得螺钉的轴部分穿过其延伸,并且曲线内表面邻接并与头部部分配合 螺钉,以便与其形成球形接头。 主体构件另外限定了一对相对的平行狭槽,其适于接收固定杆的一部分,并且锁定帽抵靠固定杆,以将杆可释放地固定在组件内。