| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bone anchoring device which enables improved handling during surgery and be manufactured with good cost effectiveness in a simple manner. <P>SOLUTION: The bone anchoring device includes: an anchoring element having a shaft for anchoring in the bone and a head; a receiving part having a top end and a bottom end; a recess for receiving a rod therein; a coaxial bore extending from the top end in the direction of the bottom end; a seat for receiving the head near the bottom end; a pressure element which is movable within the bore; and an element made of a polymer material which is arranged between the head and the pressure element. The bone anchoring device is provided for improved handling during surgery and to be manufactured in a simple manner. The head is pivotable with respect to the receiving part and can be fixed at an angle by exerting pressure via the pressure element onto the head. The pressure element can assume a first position in which the element and the pressure element are in direct contact such that the pressure element exerts a preload force onto the head via the element in which the head is maintained at an angular position by friction before locking the head. <P>COPYRIGHT: (C)2012,JPO&INPIT |
