Spine rod with elastic structure

Abstract

The utility model discloses a spine rod with an elastic structure. The spine rod comprises a rod body, at least part of the rod body extends into the micro-motion block; the check ring is arranged in the micro-motion block and used for limiting the rod body and preventing the rod body from sliding out of the micro-motion block; one end of the elastic piece abuts against the check ring, and the other end of the elastic piece abuts against the rod body. After a spine rod with an elastic structure is implanted into a patient, the bearing force part of a diseased region in a human body is borne by the spine rod, and meanwhile, when the spine moves, the elastic piece can provide proper buffering, a biological force bearing structure of the diseased region can be recovered to the maximum extent, fusion of the diseased region can be promoted, and the medical effect is improved. Meanwhile, the biological force borne by the adjacent sections of the diseased region is shared, the risk that the adjacent sections degenerate due to overhigh bearing force is reduced, the original biological force change of the spine is restored to the maximum extent, the original physiological curvature of the spine of the patient is maintained, and rehabilitation of the patient is facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a rod for spine technical field, specifically a rod for spine with elastic structure. BACKGROUND

[0002] The rod for spine belongs to a spine surgery implant, and is used for cooperating with a pedicle screw of a spine to perform a posterior internal fixation surgery of the spine. The traditional cylindrical rod for spine is rigidly fixed, and after being implanted into a human body, the force borne by a diseased part needs to be shared by adjacent segments, and once the fusion of the diseased part fails, the adjacent segments will be degenerated and the patient will face the risk of reoperation. SUMMARY

[0003] The utility model provides a rod for spine with elastic structure to solve the problem that the existing rod for spine has the risk of reoperation due to degeneration of adjacent segments and fusion failure.

[0004] The utility model provides a rod for spine with elastic structure to solve the problem that the existing rod for spine has the risk of reoperation due to degeneration of adjacent segments and fusion failure.

[0005] The utility model discloses the beneficial effects that when the patient implants the rod for spine with elastic structure, the bearing force of the diseased part in the human body is partially borne by the rod for spine, and when the spine moves, the elastic member can provide appropriate buffering, can restore the biological force bearing structure of the diseased part to the maximum extent, can not only promote the fusion of the diseased part, but also share the biological force borne by the adjacent segments of the diseased part, reduces the risk of degeneration of the adjacent segments due to excessive bearing force, restores the original biological force change of the spine to the maximum extent, maintains the original physiological curvature of the spine of the patient, and is favorable to the rehabilitation of the patient. The rod body is inserted into the micro motion block, the elastic member is installed, the retaining ring is installed on the micro motion block to limit the rod body and avoid the rod body from sliding out, the connection between the rod body and the micro motion block is more reliable through the above steps, and the connection mode is simpler.

[0006] Preferably, the rod body comprises:

[0007] The first connecting portion is arranged at one end of the rod body, and the first connecting portion is used for abutting against the retaining ring.

[0008] The second connecting portion is arranged on the side, away from the rod body, of the first connecting portion.

[0009] Preferably, the rod body further comprises:

[0010] An arc-shaped protrusion is provided on the side of the second connecting portion away from the first connecting portion.

[0011] Preferably, the micro-movement block includes;

[0012] The first connecting groove is used to accommodate the retaining ring, and the first connecting groove is provided with a retaining wall to limit the retaining ring;

[0013] The second connecting groove is connected to the first connecting groove and is used to accommodate the first connecting part.

[0014] The third connecting groove connects to the second connecting groove and is used to accommodate the second connecting part.

[0015] Preferably, the retaining ring has two mounting slots spaced apart.

[0016] Preferably, the retaining ring is welded to the micro-moving block.

[0017] Preferably, the elastic element comprises a pair of butterfly-shaped springs. Attached Figure Description

[0018] Figure 1 A cross-sectional view of a spinal rod with an elastic structure;

[0019] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0020] Figure 3 This is the front view of the rod.

[0021] Figure 4 for Figure 3 A magnified view of a section at point B in the middle;

[0022] Figure 5 This is a cross-sectional view of the micro-moving block;

[0023] Figure 6 This is the front view of the micro-moving block;

[0024] Figure 7 This is a top view of the retaining ring;

[0025] Figure 8 This is a top view of the butterfly-shaped shrapnel.

[0026] Figure 9 This is a cross-sectional view of the butterfly-shaped shrapnel.

[0027] In the figure: rod body 1, first connecting part 11, second connecting part 12, arc-shaped protrusion 13, micro-moving block 2, third connecting groove 21, first connecting groove 22, baffle 23, second connecting groove 24, retaining ring 3, mounting groove 31, butterfly spring 4. Detailed Implementation

[0028] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] In this document, terms such as "upper," "lower," "inner," and "outer" are established based on the positional relationships shown in the accompanying drawings. Depending on the drawings, the corresponding positional relationships may also change. Therefore, they should not be interpreted as an absolute limitation on the scope of protection. Moreover, relational terms such as "first" and "second" are only used to distinguish one component from another that has the same name, and do not necessarily require or imply any such actual relationship or order between these components.

[0030] Example

[0031] like Figure 1 , 2 As shown, a spinal rod with an elastic structure includes: a rod body 1; a micro-movement block 2, wherein at least part of the rod body 1 extends into the micro-movement block 2; a retaining ring 3, which is disposed within the micro-movement block 2 to limit the rod body 1 and prevent the rod body 1 from sliding out of the micro-movement block 2; and an elastic member, one end of which abuts against the retaining ring 3 and the other end of which abuts against the rod body 1.

[0032] Specifically, after a patient receives a spinal rod with an elastic structure, the spinal rod bears part of the load on the affected area. Simultaneously, the elastic component provides appropriate cushioning during spinal movement, maximizing the restoration of the bio-load-bearing structure of the affected area. This not only promotes fusion of the affected area but also distributes the bio-load to adjacent segments, reducing the risk of degeneration in these segments due to excessive load. It restores the original bio-force changes of the spine to the greatest extent possible, maintaining the patient's original physiological curvature and facilitating recovery. After the rod 1 is inserted into the micro-movement block 2, the elastic component is installed, and then the retaining ring 3 is installed on the micro-movement block 2 to limit the rod 1 and prevent it from slipping out. Through these steps, the connection between the rod 1 and the micro-movement block 2 becomes more reliable and the connection method is simpler.

[0033] like Figure 3 , 4 As shown, the rod 1 further includes: a first connecting part 11, which is disposed at the end of the rod 1 that extends into the micro-moving block 2, and is used to abut against the retaining ring 3; and a second connecting part 12, which is disposed on the side of the first connecting part 11 away from the rod 1. The outer diameter of the first connecting part 11 is significantly larger than the outer diameter of the second connecting part 12, and the outer diameter of the first connecting part 11 is also significantly larger than the outer diameter of the rod 1. The abutment between the first connecting part 11 and the retaining ring 3 prevents the rod 1 from sliding out of the micro-moving block 2.

[0034] like Figure 5, 6 As shown, the rod body 1 further includes an arc-shaped protrusion 13, which is disposed on the side of the second connecting portion 12 away from the first connecting portion 11. The diameter of the arc-shaped protrusion 13 is much smaller than the outer diameter of the second connecting portion 12.

[0035] Furthermore, the micro-moving block 2 includes: a first connecting groove 22 for accommodating the retaining ring 3, and the first connecting groove 22 is provided with a retaining wall 23 for limiting the retaining ring 3; a second connecting groove 24 communicating with the first connecting groove 22 and accommodating the first connecting part 11; and a third connecting groove 21 communicating with the second connecting groove 24 and accommodating the second connecting part 12. The retaining wall 23 is used to limit the insertion length of the retaining ring 3. Since the elastic element is disposed between the retaining wall 23 and the rod body 1, by limiting the insertion length of the retaining ring 3, the elastic deformation range of the elastic element can be effectively controlled, avoiding excessive or insufficient elastic deformation range. The inner diameter of the first connecting groove 22 is larger than the outer diameter of the rod 1, the inner diameter of the second connecting groove 24 is larger than the outer diameter of the first connecting part 11, and the inner diameter of the third connecting groove 21 is larger than the outer diameter of the second connecting part 12, so that the rod 1 can move or rotate slightly within the micro-moving block 2. The arc-shaped protrusion 13 effectively avoids the friction force between the rod 1 and the micro-moving block 2 from restricting the slight movement or rotation of the rod 1 within the micro-moving block 2.

[0036] like Figure 7 As shown, the retaining ring 3 is further provided with two mounting slots 31 spaced apart. The retaining ring 3 is screwed into the first connecting slot 22. The mounting tool and the retaining ring 3 are connected by protrusions on the mounting tool that are adapted to the two mounting slots 31, thereby driving the retaining ring 3 to be fully screwed into the first connecting slot 22.

[0037] Furthermore, the retaining ring 3 is welded to the micro-moving block 2. After the retaining ring 3 is screwed into the first connecting groove 22, the retaining ring 3 and the micro-moving block 2 are connected by laser welding to enhance the connection strength between the retaining ring 3 and the micro-moving block 2.

[0038] like Figure 8 , 9 As shown, the elastic element further includes a pair of butterfly-shaped springs 4. The two butterfly-shaped springs 4 in the same pair are arranged opposite each other, and the butterfly-shaped springs 4 have an inclination angle C, which is preferably 150°.

[0039] The technical features described above can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A spinal rod with an elastic structure, characterized in that, include: Rod (1); Micro-moving block (2), wherein the rod (1) extends at least partially into the micro-moving block (2); A retaining ring (3) is disposed inside the micro-moving block (2) to limit the rod (1) and prevent the rod (1) from sliding out of the micro-moving block (2); An elastic element, one end of which abuts against the retaining ring (3), and the other end of which abuts against the rod body (1).

2. A spinal rod with an elastic structure according to claim 1, characterized in that, The rod (1) includes: The first connecting part (11) is disposed at one end of the rod body (1) and is used to abut against the retaining ring (3). The second connecting part (12) is disposed on the side of the first connecting part (11) away from the rod (1).

3. A spinal rod with an elastic structure according to claim 2, characterized in that, The rod (1) also includes: An arc-shaped protrusion (13) is provided on the side of the second connecting portion (12) away from the first connecting portion (11).

4. A spinal rod with an elastic structure according to claim 3, characterized in that, The micro-movement block (2) includes; The first connecting groove (22) is used to accommodate the retaining ring (3), and the first connecting groove (22) is provided with a retaining wall (23) for limiting the retaining ring (3); The second connecting groove (24) communicates with the first connecting groove (22) and is used to accommodate the first connecting part (11). The third connecting groove (21) communicates with the second connecting groove (24) and is used to accommodate the second connecting part (12).

5. A spinal rod with an elastic structure according to claim 4, characterized in that, The retaining ring (3) is provided with two mounting slots (31) at intervals.

6. A spinal rod with an elastic structure according to claim 4, characterized in that, The retaining ring (3) is welded to the micro-moving block (2).

7. A spinal rod with an elastic structure according to claim 1, characterized in that, The elastic element includes a pair of butterfly-shaped springs (4).

Images