INSTRUMENTS FOR DELIVERING BONE CEMENT TO A BONE SCREW

Instruments and methods for delivering bone cement are disclosed herein. In one exemplary embodiment, the instrument includes a cannulated bone screw having a head that is configured to be received within a rod receiver and a shank extending distally from the head and configured to extend distally from the rod receiver, a cannulated shaft having a distal end configured to extend into the shank of the cannulated bone screw and a proximal end configured to couple to a bone cement delivery system, and a retaining sleeve disposed around at least a portion of the cannulated shaft. The head of the bone screw has proximal and distal recesses therein, and a distal end of the retaining sleeve is configured to couple to the proximal recess. 本文公开了用于递送骨粘固剂的器械和方法。在一个示例性实施方案中，所述器械包括：空心骨螺钉，所述空心骨螺钉具有头部和柄部，所述头部被构造成被接收在杆接收器内，所述柄部从所述头部朝远侧延伸并且被构造成从所述杆接收器朝远侧延伸；空心轴，所述空心轴具有远侧端部和近侧端部，所述远侧端部被构造成延伸到所述空心骨螺钉的所述柄部中，所述近侧端部被构造成联接到骨粘固剂递送系统；和保持套管，所述保持套管围绕所述空心轴的至少一部分设置。所述骨螺钉的所述头部在其中具有近侧凹陷部和远侧凹陷部，并且所述保持套管的远侧端部被构造成联接到所述近侧凹陷部。