Patent ID: 11937852
Assignee: BIEDERMANN TECHNOLOGIES GMBH & CO. KG
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 15:
16. A polyaxial bone anchoring device comprising:
an anchoring element having a shaft for anchoring in a bone and a head;
a receiving part configured to be pivotably connected to the head, the receiving part having a top end and a bottom end, a longitudinal axis extending through the top end and the bottom end, a channel transverse to the longitudinal axis for receiving a rod, and an accommodation space for accommodating the head;
an insert piece comprising a seat configured to hold the head in the receiving part; and
a pressure member positionable at least partially in the accommodation space and comprising a spherically-shaped outer surface portion;
wherein when the head, the insert piece, and the pressure member are in the receiving part and the head is held in the seat, the insert piece and the pressure member are both tiltable with respect to the longitudinal axis of the receiving part and with respect to a longitudinal axis of the anchoring element, and wherein the anchoring element and the insert piece are configured to be locked at respective angles relative to the longitudinal axis of the receiving part when the pressure member directly contacts the head and exerts pressure onto the head.