receiving portion for receiving a rod for coupling a bone anchoring element and bone anchoring device including such a receiving portion

摘要

receiver for receiving a rod for coupling the rod to a bone anchoring element including the receiving party side: a body receiving part (5) with a channel (13) for receiving the rod (6), wherein the channel ( 13) includes two lateral lugs (14a and 14b) and a space (19) for accommodating a head (3) of the bone anchoring element (1), space (19) having an opening (18) for introducing head, and a pressure element (8, 8 ') located at least partially in the space (19), the pressure element a flexible portion (82) to hold the head (3), where the element pressure (8) can adopt in the body of the receiving part (5) an insertion position where it is possible to introduce the head (3), a locking position wherein the head (3) is locked in the receiving part and a position pre-lock where the head (3) is fixed by the pre-tension exerted by the pressure element ng (8), and wherein the position of insertion is limited by a stop (9a, 9b, 84) acting on the pressure element (8),