Loading patent…
AssigneeBiedermann Technologies GmbH & Co. KG
InventorsLutz Biedermann, Helmar Rapp
Estimating the term…
A bone anchoring element (1) for anchoring an external device in a bone is described. A head (2) capable of connection to the external device is provided with a shaft (3) that can be anchored in a bone. A predetermined section of the shaft (3) has a bone thread (5). Moreover, the shaft (3) also has at least one bone thread-free surface (6,7; 11,12; 16,17; 21,22,23) that extends from a first end to a second end of the predetermined section essentially along the direction of the shaft axis. The bone anchoring element (1), thus provided, is pressed or soft-hammered into a hole (8, 28) previously generated in the bone and fixed in the bone by rotation by a predetermined angle. If the bone anchoring element has to be removed this can be achieved by unscrewing it in the standard fashion. The disclosure also describes methods for using the bone anchoring element.
1-22. (canceled)
A bone anchoring element comprising a shaft to be anchored in a bone, the shaft having a longitudinal axis, wherein the shaft comprises a cylindrical first section without bone thread extending along a first length of the longitudinal axis of the shaft and a bone thread on a predetermined second section extending along a second length of the longitudinal axis of the shaft that includes the entire bone thread to be anchored in the bone, the bone thread having a crest, the predetermined second section also having at least one bone thread free surface that extends along an entire length of the second length of the longitudinal axis of the shaft and interrupts the crest of the bone thread, wherein the predetermined second section of the shaft has a cross-section perpendicular to the longitudinal axis that defines a plurality of sides around a circumference defined by a diameter of the crest of the bone thread and the bone thread is located on at least one narrow side of the shaft, wherein the second length of the longitudinal axis extends from the first section, and the first length is longer than the second length.
Dependencies are inferred from the claim text.