Bone screw assembly

摘要

Spine stabilization systems are disclosed. One spine stabilization system includes a bone screw assembly including a coupling member and a screw member received therein. The coupling member includes a pair of extension elements that form a pair of slots. The slots include bottom angled surfaces. An angled wedge member having a substantially horizontal bottom surface and an angled top surface is delivered on top of the screw member within the coupling member. A rod member can be delivered down the coupling member such that it rests on the slots and on top of the angled wedge member. A locking assembly comprising a cap member and set screw can be delivered down the coupling member to secure the rod member to the coupling member. The rod member and locking assembly components can be delivered through a single incision and at a same or similar angle as the screw member during surgery.

主权项

1. A method for treating a subject requiring bone stabilization or fixation, the method comprising:
forming an incision in a body of a patient; inserting a bone screw assembly through the incision, the bone screw assembly including a coupling member having at least one angled slot, a screw member, a coupling body component having one or more slits, and an angled wedge member having an angled top surface that is an uppermost surface of the wedge member, wherein the coupling body component is independent from the coupling member and is downwardly delivered into the coupling member; attaching the screw member to a vertebral body; delivering a rod implant through the incision and into contact with the angled top surface of the angled wedge member of the bone screw assembly; and delivering a locking assembly through the incision to secure the rod implant to the bone screw assembly.