Patent ID: 11937853
Assignee: BIEDERMANN TECHNOLOGIES GMBH & CO. KG
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 19:
20. A system comprising:
a polyaxial bone anchoring device for coupling a rod to a bone, the bone anchoring device comprising:
a bone anchoring element comprising a shank for anchoring to the bone and a head;
a receiving part configured to receive the head, the receiving part having a first end and a second end below the first end, a central axis extending through the first end and the second end, and two legs defining a recess at the first end for receiving the rod, wherein at least one of the legs further defines an opening that extends through the leg to an outside of the receiving part; and
a pressure member movable in the receiving part to exert pressure on the head, the pressure member comprising at least one engagement portion; and

an instrument comprising a first engagement surface for engaging the receiving part and a second engagement surface for engaging the engagement portion of the pressure member;
wherein when the head and the pressure member are in the receiving part, the engagement portion is configured to extend at least partially into the opening of the leg and is directly engageable from outside the receiving part by the second engagement surface of the instrument, such that the second engagement surface of the instrument is configured to move the engagement portion along a direction parallel to the central axis relative to the receiving part for adjusting the pressure member both from a non-locking position in which the head is pivotable in the receiving part to a locking position in which an angular position of the receiving part relative to the bone anchoring element is locked, and from the locking position back to the non-locking position.