Bone anchoring device

摘要

A bone anchoring device includes a bone anchoring element having a shank and a head, a continuous one-piece receiver member, a continuous one-piece first locking element and a second locking element. The receiver member has a first chamber for receiving the head, the head being pivotable in the first chamber, and a second chamber with a channel for receiving the rod. A first locking element fixes the head in the first chamber at an angle, and a second locking element fixes the rod in the second chamber. The receiver member includes a body including both the first chamber and the second chamber. The head and the rod can be inserted and locked independently from each other. The head is fixed by exerting pressure onto it. The bone anchoring device is particularly applicable to the stabilization of the spine in the sacro-iliac and the cervical region.

主权项

1. A bone anchoring device comprising:
a bone anchoring element having a shank and a head; a receiver member for receiving the head of the bone anchoring element and for receiving a rod, wherein the receiver member has a first chamber for receiving the head therein, the head being pivotable in the first chamber, and a second chamber with a channel for receiving the rod; a first locking element configured to be secured to the first chamber, wherein the first locking element is a monolithic locking element; and a second locking element configured to be secured to the second chamber; wherein the first chamber has an opening to receive the first locking element and has a first engagement structure configured to cooperate with the first locking element and the second chamber has an opening to receive the second locking element and has a second engagement structure configured to cooperate with the second locking element; wherein the first chamber and the second chamber share a portion of a wall such that the portion of the wall forms both a part of the first chamber and a part of the second chamber on opposite sides thereof, and the portion of the wall further comprising both a part of the first engagement structure and a part of the second engagement structure on opposite sides thereof; wherein the first chamber and the second chamber are arranged in such a way that the head and the rod can be inserted and locked independently from each other; and wherein the head is fixed by applying pressure onto it via direct contact with the first locking element and wherein the rod is fixed by applying pressure onto it via the second locking element.