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

Claim 16:
17. A method of coupling a rod to a bone using a polyaxial bone anchoring device comprising a bone anchoring element comprising a shank 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, two legs at the first end for receiving the rod therebetween, and an opening that extends through a side of the receiving part to an outer surface of the receiving part, a monolithic pressure member movable in the receiving part and configured to directly contact the head to exert pressure on the head, the pressure member comprising at least one engagement portion, and a fixation member, the method comprising:
anchoring the shank of the bone anchoring element to the bone or vertebra;
pivoting the receiving part relative to the bone anchoring element when the head and the pressure member are in the receiving part, where the engagement portion of the pressure member is configured to extend laterally through the opening of the receiving part and radially outwardly past both a portion of the outer surface that defines a region of the opening located below the engagement portion and a portion of the outer surface that defines a region of the opening located circumferentially to one side of the engagement portion, and is directly engageable from outside the bone anchoring device by an instrument;
moving the engagement portion with the instrument to adjust the pressure member 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;
adjusting the rod between the legs of the receiving part; and
advancing the fixation member in the receiving part to fix the rod in the recess.