BONE ANCHORING DEVICE
A bone anchoring device includes a bone anchoring section for anchoring in a bone or a vertebrae, a receiving part for receiving a connection element, a connection element which is at least partly made of a flexible material, a fixation element for fixing the connection element in the receiving part, and wherein a sleeve is provided around the connection element in the receiving part.
1 . A bone anchoring device comprising:
a bone anchoring section for anchoring in a bone or a vertebrae;
a receiving part for receiving a connection element;
a connection element having at least a portion that is threadless, the threadless portion to be located in the receiving part, the threadless portion also at least partly made of a flexible material;
a fixation element for fixing the threadless portion of the connection element in the receiving part;
a sleeve to be provided around and engage the threadless portion of the connection element in the receiving part when fixing the threadless portion of the connection element in the receiving part; and
wherein the sleeve is made of a material which is rigid compared to the material of the threadless portion of the connection element.
2 . A bone anchoring device according to claim 1 , wherein the sleeve comprises a slit extending through a wall of the sleeve from one end of the sleeve to the opposite end of the sleeve.
3 . A bone anchoring device according to claim 1 , wherein an inner wall of the sleeve comprises protrusions.
4 . A bone anchoring device according to claim 3 , wherein the protrusions are shaped as circumferential ribs.
5 . A bone anchoring device according to claim 1 , wherein an inner diameter of the sleeve is slightly larger than an outer diameter of the connection element.
6 . A bone anchoring device according to claim 1 , wherein the sleeve is made of a rigid material.
7 . A bone anchoring device according to claim 1 , wherein the connection element is a rod.
8 . A bone anchoring device according to claim 1 , wherein the connection element is made at least partly of an elastomer material.
9 . A bone anchoring device according to claim 1 , wherein the receiving part is substantially cylindrical and comprises a U-shaped recess forming two free legs.
10 . A bone anchoring device according to claim 1 , wherein the fixation element is a locking screw.
11 . A bone anchoring device according to claim 1 , wherein the bone anchoring section and the receiving part are connected monoaxially.
12 . A bone anchoring device according to claim 1 , wherein the bone anchoring section and the receiving part are pivotably connected.
13 . A bone anchoring device according to claim 2 , wherein the slit is open in a direction perpendicular to a direction of a pressure force exerted by the fixation element.
14 . A bone anchoring device according to claim 1 , wherein an inner wall of the sleeve comprises a surface roughness.
15 . A bone anchoring device according to claim 1 , wherein the sleeve is made from metal.
16 . A bone anchoring device comprising:
a bone anchoring section for anchoring in a bone or a vertebrae;
a receiving part for receiving a connection element;
a connection element at least partly made of a flexible material;
a fixation element for fixing the connection element in the receiving part;
a sleeve configured to be around the connection element in the receiving part;
wherein the sleeve is made of a material which is rigid compared to the material of the connection element; and
wherein the smallest inner diameter of the sleeve is larger than the largest outer diameter of the connection element.
17 . A method of anchoring a bone anchoring device to bone or vertebrae, the bone anchoring device comprising a bone anchoring section for anchoring in a bone or a vertebrae, a receiving part for receiving a connection element, a connection element at least partly made of a flexible material, a fixation element for fixing the connection element in the receiving part, a sleeve around the connection element in the receiving part, and wherein the sleeve is made of a material which is rigid compared to the material of the connection element, the method comprising:
anchoring the bone anchoring section to a bone or vertebrae;
sliding the sleeve over the connection element without threading the sleeve; and
fixing the sleeve in the receiving part to fix the connection element to the receiving part.