阅读说明：本技术 椎弓根螺钉在脊柱骨节段上的额外固定装置 (Additional fixation of pedicle screws to spinal bone segments ) 是由 J-D·M·R·梅泰泽奥 T·莫尼耶 于 2020-06-15 设计创作，主要内容包括：额外固定装置(1),其可以连接脊柱装置(50)的椎弓根螺钉(2、200)与相应的骨节段,其主体(10)一方面包括直接或间接配合相应椎弓根螺钉(2、200)钉体的第一固定部件(20),另一方面包括第二固定部件(30),以确保柔性条(3)张紧后穿过并固定,从而构成额外的锚定点。(Additional fixation device (1) which can connect pedicle screws (2, 200) of a spinal device (50) with the corresponding bone segments, the body (10) of which comprises, on the one hand, a first fixation element (20) which directly or indirectly engages the shank of the corresponding pedicle screw (2, 200) and, on the other hand, a second fixation element (30) to ensure that the flexible strip (3) passes through and is fixed after tensioning, thus constituting an additional anchoring point.)

1. An additional fixation device (1) that can connect pedicle screws (2, 200) of a spinal device (50) with the corresponding bone segments before placing the bone rods of the spinal device (50), characterized in that it comprises a body (10) comprising, on the one hand, a first fixation element (20) that directly or indirectly engages the shank of the corresponding pedicle screw (2, 200) and, on the other hand, a second fixation element (30) to ensure that a flexible strip (3) passes and is fixed after tensioning, thus constituting an additional anchoring point.

2. Additional fixation device according to claim 1, characterized in that the body (10) comprises a first fixation part (20) engaging the shank of the pedicle screw (2), while the second fixation part (30) comprises, on the one hand, a slit (31) running perpendicularly through the shank of the pedicle screw (2) allowing the passage of the flexible strip (3), and, on the other hand, a threaded cap (32) screwed into the interior of the body (10) to lock the flexible strip after tensioning.

3. Additional fixation device according to claim 2, characterized in that the threaded cap (32) connects a threaded shaft (33) provided in the vertical shaft extension of the pedicle screw (2) to constitute the double-threaded pedicle screw.

4. Additional fixation device according to claim 1, characterized in that the body (10) is constituted by a sleeve (11), wherein the first fixation means (20) is constituted by a central hole (21) which can be positioned on the hemispherical central head (5) of the double-threaded pedicle screw (2), while the second fixation means (30) are provided in the lateral extension of the sleeve (11) in order to position and fix the flexible strip (3) in a plane deviating from the vertical axis of the pedicle screw (2).

5. Additional fixation device according to claim 4, characterized in that the body is angularly indexed by a sleeve (11) on the hemispherical head (5) of the double-threaded pedicle screw (2).

6. Additional fixing means according to claim 4, characterized in that the second fixing part (30) consists of a joint (34) in the extension of the sleeve (11), the bottom of which has a horizontal slit (35) through which the flexible strip (3) can pass and in the vertical direction has a fastening screw (36) which can be fixed to the flexible strip (3) after it has been tensioned.

7. Additional fixing means according to claim 4, characterized in that the second fixing part (30) consists of a joint (34) in the extension of the sleeve (11), the joint bottom having two horizontal slits (37, 38) along two different axially through-going joints intersecting the centre of the joint (34).

8. Additional fixing device according to claim 7, characterized in that the joint (34) comprises a vertical threaded hole (39) above the horizontal slits (37, 38) for cooperating with a tightening screw (36) which, when tightened, can bring the flexible strip (3) under tension inside the sleeve (11).

9. Additional fixing device according to claim 4, characterized in that the second fixing part (30) consists of a joint (40) in the extension of the sleeve (11), which has a central opening (41) in the horizontal plane and is divided (42) into two different parts by a fastening ring, in order to delimit two vertical channels (41)a、41b) To place and secure the tensioned flexible strip (3).

10. Additional fixation device according to claim 1, characterized in that the body (10) is constituted by a flange (60) comprising, on the one hand, a first fixation means (20) to ensure the fixation of the flange (60) on the periphery of the hemispherical head (5) of the double-threaded pedicle screw (2), and, on the other hand, a second fixation means (30) provided in the lateral extension of the flange (60) to position and fix the flexible strip (3) in a plane offset from the vertical axis (2) of the pedicle screw.

11. Additional fixation device according to claim 8, characterized in that the first fixation part (20) is constituted by a deformable element (61) to ensure elastic fixation on the hemispherical head periphery (5) of the double-threaded pedicle screw (2).

12. Additional fixation device according to claim 8, characterized in that the first fixation part (20) is constituted by a mechanical element (67) to ensure fixation on the hemispherical head periphery (5) of the double-threaded pedicle screw (2) by screwing.

13. Additional fixing means according to claim 8, characterized in that the second fixing part (30) consists of a joint (63) in the extension of the flange (60), which joint has a central opening (64) in a vertical plane and is divided into two different parts by a fastening ring (65) in order to delimit two channels (64)a、64b) To place and secure the tensioned flexible strip (3).

14. Additional fixing device according to claim 1, characterized in that the body (10) is constituted by a ring (70) comprising, on the one hand, a first fixing element (20) to ensure the fixing of the ring on the periphery of a connection joint (51) mounted angularly freely around the head (201) of the pedicle screw (200), and, on the other hand, a second fixing element (30) arranged in the lateral extension of the ring (70) to position and fix the flexible strip (3) in a plane offset from the vertical axis of the pedicle screw (200).

15. Additional fixation device according to claim 12, characterized in that the first fixation element (20) is constituted by a deformable vertical branch (71) to ensure an elastic fixation on the periphery of the connection joint (51) of the pedicle screw (200).

16. Additional fixing means according to claim 12, characterized in that the second fixing element (30) is constituted by a joint (73) in the extension of the ring (70), the bottom of which has a horizontal slit (74) enabling the passage of the flexible strip (3) and, in the vertical direction, a fastening screw (75) that can be fixed to the flexible strip (3) after it has been tensioned.

17. Additional fixation device according to claim 1, characterized in that the body (10) is constituted by an open ring (80) comprising, on the one hand, a first fixation means (20) to ensure the fixation of the ring on the periphery of the hemispherical head (5) of the double-threaded pedicle screw (2) and, on the other hand, a second fixation means (30) arranged in the lateral extension of the ring (80) to position and fix the flexible strip (3) in a plane offset from the vertical axis of the pedicle screw.

18. Additional fixing means according to claim 15, characterized in that the first fixing element (20) is constituted by an open flexible lamina (81) the inner surface of which is provided with a recess (82) cooperating with a male pin (83) arranged on the periphery of the hemispherical head (5) of the double-threaded pedicle screw (2), the open flexible lamina (81) comprising an opening (84) at its first free end and an opposite second free end connected to the second fixing element (30), the second fixing element being constituted by a joint (85) having a horizontal slit (86) at the bottom and a fastening screw (87) in the vertical direction.