Vertebral body filling and vertebral pedicle strengthening reconstruction device

Abstract

The utility model discloses a vertebral body filling and vertebral pedicle strengthening reconstruction device which is used for connecting a vertebral body and a zygopophysis. The vertebral body filling and vertebral pedicle reinforced reconstruction device comprises an opening and a blind end opposite to the opening, and the vertebral body filling and vertebral pedicle reinforced reconstruction device sequentially comprises a first filling part and a second filling part from the blind end to the opening; the first filling part is arranged in the cone; the opening is formed in the zygopophysis; when filler is injected into the vertebral body filling and vertebral pedicle strengthening reconstruction device, the second filling part located between the vertebral body and the zygopophysis can play a role like the vertebral pedicle and connect the vertebral body and the zygopophysis. According to the utility model, the filler is injected into the first filling part arranged in the vertebral body to complete the filling of the vertebral body; when filler is injected into the vertebral body filling and vertebral pedicle reinforced reconstruction device, the second filling part located between the vertebral body and the zygopophysis can serve as a vertebral pedicle to be connected with the vertebral body and the zygopophysis, and reinforced reconstruction of the vertebral pedicle can be completed while the vertebral body is formed.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and specifically relates to a vertebral body filling and pedicle strengthening and reconstruction device. Background Art

[0002] The spine is a common site for metastatic tumors. Metastatic tumors are the most common. Osteolytic spinal tumors cause osteoporosis, fragility, and pathological fractures by destroying bone tissue, seriously affecting the stability of the spine and the quality of life of patients. In such cases, vertebroplasty may be required to restore the vertebral body height and stability.

[0003] However, traditional vertebroplasty faces some challenges in spinal patients, such as easy leakage and insufficient pedicle strengthening. The classic vertebroplasty mesh bag technology can solve the problem of vertebral bone cement leakage, but cannot perform pedicle strengthening and reconstruction.

[0004] In view of this, the present utility model is specifically proposed. Content of the Utility Model

[0005] Aiming at a series of problems such as easy leakage and insufficient pedicle strengthening in traditional vertebroplasty for spinal patients, the present utility model provides a vertebral body filling and pedicle strengthening and reconstruction device, which can avoid the occurrence of the above problems.

[0006] To achieve the above object, the present utility model provides a vertebral body filling and pedicle strengthening and reconstruction device for connecting the vertebral body and the articular process;

[0007] The vertebral body filling and pedicle strengthening and reconstruction device includes an opening and a blind end opposite to the opening. The vertebral body filling and pedicle strengthening and reconstruction device sequentially includes a first filling portion and a second filling portion from the blind end to the opening;

[0008] The first filling portion is arranged in the vertebral body;

[0009] The opening end of the vertebral body filling and pedicle strengthening and reconstruction device is arranged in the articular process;

[0010] When filling material is injected into the vertebral body filling and pedicle strengthening and reconstruction device, the second filling portion located between the vertebral body and the articular process can serve as a pedicle to connect the vertebral body and the articular process.

[0011] Furthermore, the first filling portion is provided with mesh holes.

[0012] Furthermore, the first filling portion has a cystic structure.

[0013] Furthermore, when the filling material is injected, the first filling portion expands and fits against the inner cavity surface of the vertebral body.

[0014] Further, the second filling portion is provided with mesh holes.

[0015] Further, both the first filling portion and the second filling portion are provided with mesh holes.

[0016] Further, the diameter of the mesh holes in the first filling portion is larger than the diameter of the mesh holes in the second filling portion.

[0017] Further, a weaving structure is adopted, and the first filling portion is woven sparsely, while the second filling portion is woven densely.

[0018] The utility model has the following beneficial effects:

[0019] (1) In the utility model, the vertebral body is filled with filler by injecting the filler into the first filling portion arranged in the vertebral body; when injecting the filler into the vertebral body filling and pedicle strengthening and reconstruction device, the second filling portion located between the vertebral body and the articular process can be used as the pedicle to connect the vertebral body and the articular process, so that while the vertebroplasty is completed, the strengthening and reconstruction of the pedicle can be completed to ensure the original strength of the pedicle and maintain the stability of the spine.

[0020] The following further describes in detail the specific embodiments of the utility model with reference to the drawings. Description of the Drawings

[0021] The drawings, as a part of the utility model, are used to provide a further understanding of the utility model. The schematic embodiments and descriptions thereof of the utility model are used to explain the utility model, but do not constitute an improper limitation to the utility model. Obviously, the drawings described below are only some embodiments, and those of ordinary skill in the art can obtain other drawings according to these drawings without creative efforts.

[0022] In the drawings:

[0023] Figure 1 is the structural diagram of the vertebral body filling and pedicle strengthening and reconstruction device;

[0024] Figure 2 is the structural schematic diagram when the vertebral body filling and pedicle strengthening and reconstruction device is working.

[0025] In the figures:

[0026] 1, vertebral body; 2, pedicle; 3, articular process; 4, first filling portion; 41, first mesh hole; 5, second filling portion; 51, second mesh hole.

[0027] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present utility model to those skilled in the art by referring to specific embodiments. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but are not used to limit the scope of the present utility model.

[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0030] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example,

[0031] it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] The present utility model provides a vertebral body filling and pedicle reinforcement and reconstruction device for connecting a vertebral body 1 and a zygapophysis 3. The vertebral body filling and pedicle reinforcement and reconstruction device includes an opening and a blind end opposite to the opening. The vertebral body filling and pedicle reinforcement and reconstruction device successively includes a first filling portion 4 and a second filling portion 5 from the blind end to the opening; the first filling portion 4 is disposed within the vertebral body 1; the open end of the vertebral body filling and pedicle reinforcement and reconstruction device is disposed within the zygapophysis 3; when a filling material is injected into the vertebral body filling and pedicle reinforcement and reconstruction device, the second filling portion 5 located between the vertebral body 1 and the zygapophysis 3 can serve as a pedicle 2 to connect the connecting vertebral body 1 and the zygapophysis 3.

[0033] The filling material may be bone cement or other filling materials. As a specific implementation manner, the filling material in this embodiment is bone cement.

[0034] The filling of the vertebral body 1 is completed by the expansion of the first filling part 4. The first filling part 4 is provided with mesh holes, through which the bone cement in the first filling part can contact the inner cavity of the vertebral body, enabling the bone cement to fully contact the surrounding tissues and playing a role in support or elevation. When injecting bone cement into the vertebral body filling and pedicle strengthening and reconstruction device, the second filling part 5 located between the vertebral body 1 and the articular process 3 can connect the vertebral body 1 and the articular process 3 as the pedicle 2, and can complete the strengthening and reconstruction of the pedicle 2 while completing the treatment of the vertebral body 1.

[0035] Specifically, one end of the second filling part 5 is open, and the other end opens towards the first filling part 4 and communicates with the first filling part 4. One end of the first filling part 4 is arranged to open towards the second filling part 5, and the first filling part 4 extends a certain length in the direction away from the second filling part 5 and is closed.

[0036] In this embodiment, the first filling part 4 is provided with mesh holes.

[0037] Specifically, a plurality of first mesh holes 41 are provided on the first filling part 4, and are evenly arranged in a grid pattern on the surface of the first filling part 4. After filling with bone cement, the first filling part 4 expands. When the injection pressure reaches a certain level, the bone cement can ooze out from the first mesh holes 41 through the setting of the first mesh holes 41 and is well fitted with the trabeculae.

[0038] In this embodiment, the first filling part 4 has a sac-like structure.

[0039] Specifically, one end of the first filling part 4 is open and the other end is closed. The bone cement is injected into the first filling part 4 from the open end, causing the first filling part 4 to expand and become larger inside the vertebral body 1. The use of a sac-like structure facilitates better filling of the vertebral body 1.

[0040] In this embodiment, when injecting bone cement, the first filling part 4 expands and fits against the inner cavity surface of the vertebral body 1.

[0041] Specifically, in the vertebral body filling operation, the first filling part 4 is placed inside the vertebral body 1, and bone cement is started to be injected. The first filling part 4 expands and becomes larger through continuous injection of the bone cement and fits against the inner cavity surface of the vertebral body 1. When the injection pressure reaches a certain level, part of the bone cement will ooze out from the first mesh holes 41 provided on the surface of the first filling part 4 and be fitted with the trabeculae.

[0042] In this embodiment, the second filling part 5 is provided with mesh holes.

[0043] It should be noted that when the pedicle 2 has pathological damage, such as a defect in the pedicle 2 caused by a spinal tumor. In this case, the conventional vertebroplasty cannot perform the treatment of strengthening and reconstructing the defective pedicle, and the surgical effect is not ideal. After the second filling part 5 is filled with bone cement, it can replace the pedicle 2 or strengthen the original pedicle 2, so that leakage will not occur after the filling of the vertebral body 1 is completed, and at the same time, the defective pedicle is also strengthened and reconstructed, improving the surgical success rate.

[0044] Specifically, the open end of the second filling part 5 is arranged in the articular process 3, and the second filling part 5 is connected to the vertebral body 1 and the articular process 3.

[0045] Preferably, the first filling part 4 and the second filling part 5 are both provided with mesh holes.

[0046] Specifically, a plurality of first mesh holes 41 are arranged on the outer surface of the first filling part 4, and a plurality of second mesh holes 51 are arranged on the surface of the second filling part 5. The vertebral body filling and pedicle strengthening and reconstructing device is designed into a porous structure, which can adapt to the anatomical structures of the vertebral body 1 and the pedicle 2.

[0047] It should be noted that by providing the first mesh holes 41 and the second mesh holes 51, the bone cement can fully contact the surrounding tissues, and irregular protrusions are formed on the surface of the mesh holes, which is beneficial to fully combine with the surrounding tissues to improve the connection strength with the tissues.

[0048] It should be noted that the first filling part 4 and the second filling part 5 are made of high-strength and biocompatible materials, such as polylactic acid or polyethylene terephthalate or other implantable materials. Such a setting can ensure that no adverse immune reaction is caused after the mesh bag is implanted into the body, and sufficient support force can be provided after the bone cement is injected.

[0049] In this embodiment, the diameter of the mesh holes on the first filling part 4 is larger than the diameter of the mesh holes on the second filling part 5.

[0050] Specifically, the diameter of the first mesh holes 41 is larger than the diameter of the second mesh holes 51. The first mesh holes 41 can allow part of the bone cement in the first filling part 4 to ooze out, so as to be embedded with the trabecular bone. The diameter of the second mesh holes 51 should be smaller than the particle size of the bone cement, that is, the bone cement can be restricted within the second filling part 5 and will not ooze out. In this way, on the one hand, the strengthening of the pedicle 2 can be completed, and at the same time, the compression of the surrounding blood vessels or nerves caused by the oozing of the bone cement can be avoided, thus preventing complications.

[0051] In this embodiment, the vertebral body filling and pedicle strengthening and reconstructing device adopts a braided structure, and the first filling part 4 is braided sparsely, while the second filling part 5 is braided densely.

[0052] Specifically, the first filling portion 4 and the second filling portion 5 adopt a woven structure. The weaving of the first filling portion 4 disposed inside the vertebral body 1 is sparse. When the pressure of the injected bone cement reaches a predetermined pressure, it will seep out from the sparse pores of the weaving, better fitting with the trabecular bone. The second filling portion 5 disposed inside the pedicle 2 is densely woven. When bone cement is injected, the bone cement is restricted within the second filling portion, but the bone cement will not seep out to avoid compressing the surrounding blood vessels and nerves and causing complications.

[0053] Specifically, the sparse first filling portion 4 is placed inside the vertebral body 1, allowing the bone cement to flow and distribute evenly, ensuring that the bone cement can be controlled inside the mesh bag during injection to form a uniform support structure. The dense second filling portion 5 is placed at the pedicle 2 site and can be used to reconstruct the pedicle 2 and reduce the damage at the pedicle 2 site.

[0054] The above are only the preferred embodiments of the present invention and do not impose any formal restrictions on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art of this patent, without departing from the scope of the technical solution of the present invention, can make some changes or modifications using the technical content prompted above as equivalent embodiments of equivalent changes. The implementation schemes in the above embodiments can also be further combined or replaced. However, as long as the content does not depart from the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention still fall within the scope of the present invention's solution.

Claims

1. A vertebral body filling and pedicle strengthening and reconstruction device, characterized in that, For connecting the vertebral body and the articular process; The vertebral body filling and pedicle strengthening and reconstruction device includes an opening and a blind end opposite to the opening. The vertebral body filling and pedicle strengthening and reconstruction device successively includes a first filling part and a second filling part from the blind end to the opening; The first filling part is arranged in the vertebral body; The opening is arranged in the articular process; When filling material is injected into the vertebral body filling and pedicle strengthening and reconstruction device, the second filling part located between the vertebral body and the articular process can serve as a pedicle to connect the vertebral body and the articular process.

2. The vertebral body filling and pedicle strengthening and reconstruction device according to claim 1, characterized in that, The first filling part is provided with mesh holes.

3. A vertebral body filling and pedicle reinforcement and reconstruction device according to claim 2, characterized in that, The first filling part is in a sac-like structure.

4. A vertebral body filling and pedicle strengthening and reconstruction device according to claim 2, wherein When the filling material is injected, the first filling part expands and fits with the inner cavity surface of the vertebral body.

5. A vertebral body filling and pedicle reinforcement and reconstruction device according to claim 1, characterized in that, The second filling part is provided with mesh holes.

6. A vertebral body filling and pedicle strengthening and reconstruction device according to claim 1, characterized in that, Both the first filling part and the second filling part are provided with mesh holes.

7. A vertebral body filling and pedicle strengthening and reconstruction device according to claim 6, wherein The diameter of the mesh holes on the first filling part is larger than the diameter of the mesh holes on the second filling part.

8. A vertebral body filling and pedicle reinforcement and reconstruction device according to claim 6, characterized in that, Adopt a woven structure.

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