Patent ID: 11931079
Assignee: BIEDERMANN TECHNOLOGIES GMBH & CO. KG
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 15:
16. A bone anchoring device comprising:
a bone anchoring element comprising a shaft and a head;
a receiving part for receiving a rod for coupling the rod to the bone anchoring element, the receiving part comprising:
a receiving part body having a first end, a second end below the first end, a channel at the first end for receiving the rod, and an accommodation space at the second end for accommodating the head of the bone anchoring element; and
a pressure element positionable at least partially in the accommodation space, the pressure element comprising a first section defining a recess for receiving the rod, wherein the recess is U-shaped and has a depth that is less than half of a greatest width of the recess, and a second section with a head contacting surface for contacting and exerting pressure on the head;

wherein when the pressure element is in the receiving part body, the head is insertable from the second end of the receiving part body past an expandable portion of the bone anchoring device into the accommodation space, and the pressure element is movable to a pre-locking position where the pressure element is restricted from moving towards the first end of the receiving part body while the expansion of the expandable portion is restricted to prevent removal of the head from the receiving part, and
wherein an outer width of the expandable portion in an unbiased state is greater than a maximum outer width of the first section of the pressure element.