Patent ID: 9277938
Filing Date: 2016-03-08
CPC Classification: A61B

Claim Text:
1. A polyaxial bone anchoring system comprising: a receiving part having a first end and a second end, a central axis extending through the first end and the second end, a transverse channel at the first end for receiving a rod, and an accommodation space having an opening at the second end; a first anchoring element having a first shank for anchoring in a bone or a vertebra and a first head having a spherically-shaped outer surface portion; a sleeve-like insert piece configured to be arranged around a portion of the first head and to be arranged in and pivot in the accommodation space of the receiving part, such that an angle formed by a central axis of the insert piece with the central axis of the receiving part is adjustable when the insert piece is in the accommodation space; a second anchoring element having a second shank for anchoring in a bone or a vertebra and a second head having a greater width than a greatest width of the first head, wherein the first head with the insert piece and the second head are each configured to be introduced into the accommodation space through the opening, such that the first bone anchoring element and the second bone anchoring element are configured to be interchangeably connectable to the receiving part; and a pressure member configured to be arranged at least partially in the accommodation space, the pressure member comprising a portion configured to contact the first head or the second head to exert pressure onto the first head or the second head when the pressure member and one of the first head or the second head are arranged in the receiving part; wherein when any one of the first anchoring element or the second anchoring element is connected to the receiving part, the connected anchoring element is pivotable relative to the receiving part and can be locked at an angle relative to the receiving part by exerting pressure with the pressure member onto the respective head of the connected anchoring element.