| 摘要 |
A coupling assembly is provided for coupling a rod to a bone anchoring element. The coupling assembly includes a receiving part (5, 5′, 5″) with a top end (5a) and an opposite bottom end (5b); a section (52) for receiving the rod; an accommodation space (55, 56) for accommodating a head (3) of the bone anchoring element, the accommodation space being connected to the top end of the receiving part through a passage (51; 120) and being connected to the bottom end through an opening (57) at the bottom end for inserting the head; and a pressure element (7, 7′, 7″) located at least partially in the accommodation space, the pressure element having a cap portion (72) configured to surround the head. |
