Bone anchoring device

A bone anchoring device comprising:

• an anchoring element to be anchored to a bone or a vertebra and having a head;
• a connection element;
• a receiving part having a first end receiving the head, wherein the head is pivotable in the receiving part, and a second end comprising a recess for receiving the connection element;
• a first pressure element which exerts pressure on the head to lock the head in the receiving part;
• a second pressure element which exerts pressure on the connection element to press the connection element against the first pressure element and wherein the second pressure element directly applies pressure to the first pressure element;
• wherein a contour of the surface of at least the first pressure element or the second pressure element facing the connection element deviates from a contour of the surface of the connection element;
• wherein the connection element is made of an elastic material;
• and
• wherein a closure element is provided which closes the recess of the receiving part and which exerts onto the second pressure element.

A bone anchoring device comprising:

• an anchoring element to be anchored to a bone or a vertebra and having a head;
• an elastic connection element constructed from a plastic material;
• a receiving part having a first end receiving the head, wherein the head is pivotable in the receiving part, and a second end comprising a recess for receiving the connection element;
• a first pressure element having a recess and configured to exert pressure on the head to lock the head in the receiving part;
• and
• a second pressure element having a recess and configured to exert pressure on the connection element to press the connection element against the first pressure element;
• wherein the recess of the first pressure element and the recess of the second pressure element define a cage structure to receive the connection element;
• wherein the second pressure element is moveable from a first position spaced apart from the first pressure element and contacting the connection element to a second position closer to the first pressure element;
• and
• wherein at least a portion of the cage structure deviates from a contour of the surface of the connection element such that the portion of the cage structure plastically deforms a portion of the surface of the connection element in the second position of the second pressure element to interlock with the connection element.

A bone anchoring device comprising:

• an anchoring element to be anchored to a bone or a vertebra and having a head;
• an elastic connection element;
• a receiving part having a first end receiving the head, wherein the head is pivotable in the receiving part, and a second end comprising a recess for receiving the connection element;
• a first pressure element having a recess, the first pressure element configured to exert pressure on the head to lock the head in the receiving part;
• and
• a second pressure element having a recess, the second pressure element configured to exert pressure on the connection element to press the connection element against the first pressure element;
• wherein the surface of the recess of at least the first pressure element or the second pressure element facing the connection element deviates from the contour of the surface of the connection element;
• and
• wherein the second pressure element contacts the first pressure element to apply pressure on the first pressure element.