| 摘要 |
<p>A Bone anchoring assembly is provided, comprising: a bone anchoring element (1, 20) having a shank (2, 22) to be anchored in a bone or a vertebrae, and a receiving part (3, 25) for receiving a rod (9); a rod made at least partly of a material which exhibits a material flow under pressure; the receiving part (3, 25) comprising a channel (4, 36) with an approximately U-shaped cross-section with two free legs (5, 6, 37, 38); a first locking element (11, 101) cooperating with the legs to secure the rod in the channel, a second locking element (12, 102) cooperating with the first locking element and acting independently from the first locking element onto the rod; wherein
a pin-shaped projection (15, 105) is provided at the second locking element (12,102) which comes into contact with the rod when tightening the second locking element and wherein
at least one pin-shaped projection (13a, 13b, 40a, 40b) is provided in the channel which comes into contact with the rod when tightening the first locking element.</p> |
