| 摘要 |
<p>A bone anchoring device (1) is provided that includes an anchoring element (2) having a shaft (3) for anchoring in the bone and a head (4), a receiving part (5) having a top end (51) and a bottom end (52), a recess (55) for receiving a rod (20) therein, a coaxial bore (53) extending from the top end (51) in the direction of the bottom end (52) and a seat (54) for receiving the head near the bottom end (52); a pressure element (6) which is movable within the bore (53) and an element (8) made of a polymer material which is arranged between the head (4) and the pressure element (6). The bone anchoring device (1) is provided for improved handling during surgery and to be manufactured in a simple manner. The head (4) is pivotable with respect to the receiving part (5) and can be fixed at an angle by exerting pressure via the pressure element (6) onto the head (4), and wherein the pressure element (6) can assume a first position in which the element (8) and the pressure element (6) are in direct contact such that the pressure element (6) exerts a preload force onto the head (4) via the element (8) in which the head (4) is maintained at an angular position by friction before locking the head (4).</p> |
