Interbody fusion cage

Abstract

The utility model discloses an interbody fusion cage. The intervertebral fusion cage comprises a frame body, the frame body adopts a tantalum-containing medical ceramic piece, the frame body comprises two first parts, a second part and a third part, the two first parts are arranged in parallel in a spaced mode, each first part is provided with a first end and a second end which are arranged in a spaced mode, and the two first ends are fixedly connected through the second part; the two second ends are fixedly connected through the third part, the first part, the second part and the third part are enclosed to form a bone grafting window, and at least the first part is provided with a bone growth promoting structure. By adopting the tantalum-containing medical ceramic piece, the intervertebral fusion cage has excellent mechanical property, corrosion resistance and biocompatibility, the initial implantation time is shortened, development can be realized at lower cost, and meanwhile, the bone grafting window is formed in the frame piece and the bone growth promoting structure is arranged, so that the bone grafting effect is improved. The better effect of promoting bone growth and bone fusion can be achieved, and then the binding force and stability of the fusion cage and bone tissue are effectively improved.

Description

Technical Field

[0001] This utility model relates to medical devices, and more particularly to an intervertebral fusion device implanted in the intervertebral disc. Background Art

[0002] Interbody fusion is a common bone repair surgery used to treat spinal diseases and injuries. In traditional interbody fusion surgery, polyetheretherketone (PEEK) implants are typically used. While PEEK implants have good biocompatibility and mechanical properties, they have poor bone growth, strength, and corrosion resistance, which is detrimental to bone tissue growth and repair. Furthermore, the polymer material cannot be visualized under a C-arm lumbar support, requiring the installation of imaging pins, making production and assembly cumbersome.

[0003] Based on the above, there is an urgent need for an interbody fusion device that can solve the aforementioned technical problems. Utility Model Content

[0004] The purpose of this invention is to provide an intervertebral fusion device that has superior bone growth promotion, mechanical properties and corrosion resistance, and can achieve imaging at a lower cost.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An intervertebral fusion device for implantation in an intervertebral disc includes a frame body made of tantalum-containing medical ceramic. The frame body includes two first parts, one second part, and one third part. The two first parts are parallel and spaced apart. Each first part has a first end and a second end spaced apart. The two first ends are fixedly connected by the second part, and the two second ends are fixedly connected by the third part. The first part, the second part, and the third part enclose a bone graft window, and at least the first part is provided with a bone growth promoting structure.

[0007] Optionally, the tantalum-containing medical ceramic component includes a medical ceramic component containing tantalum wire.

[0008] Optionally, the tantalum-containing medical ceramic component includes a medical ceramic component containing tantalum powder.

[0009] Optionally, the tantalum-containing medical ceramic component includes a medical ceramic component containing tantalum sheets.

[0010] Optionally, the bone growth promoting structure includes a trabecular bone structure; and / or, the bone growth promoting structure includes a multi-pore structure.

[0011] Optionally, the multi-hole structure includes a plurality of circular holes arranged in parallel.

[0012] Optionally, the multi-hole structure includes multiple first holes with axes arranged along a first direction and multiple second holes with axes arranged along a second direction, wherein the first direction and the second direction are perpendicular to each other.

[0013] Optionally, the first circular hole and the second circular hole are connected.

[0014] Optionally, the second part is provided with a tool fitting port, and the multi-hole structure is only provided in the first part and the third part.

[0015] Optionally, the first part is provided with anti-retraction teeth and bone graft fusion holes. The anti-retraction teeth are used to prevent the intervertebral fusion device from regressing, and the bone graft fusion holes are used to promote bone fusion.

[0016] The beneficial effects of the intervertebral fusion device provided by this utility model are as follows: by using tantalum-containing medical ceramic components, the intervertebral fusion device has excellent mechanical properties and corrosion resistance, superior biocompatibility, shortens the initial implantation time, and can achieve imaging at a lower cost. At the same time, by forming a bone graft window in the frame component and setting a bone growth promoting structure, it can achieve a better effect of promoting bone growth and bone fusion, thereby effectively improving the bonding force and stability between the fusion device and bone tissue. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the first interbody fusion device in this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the first interbody fusion device with concealed trabecular bone structure in this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the second type of interbody fusion device in this utility model;

[0020] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle;

[0021] Figure 5 This is a top view of the second type of interbody fusion device in this utility model;

[0022] Figure 6 This is a side view of the structure of the second type of interbody fusion device in this utility model.

[0023] In the picture:

[0024] 11. First step; 111. Bone graft fusion hole; 112. Anti-retraction tooth;

[0025] 12. Part Two; 121. Tool Fitting Port;

[0026] 13. Part Three;

[0027] 100. Bone graft window; 201. Trabecular bone structure; 202. Multi-hole structure; 2021. First hole; 2022. Second hole. Detailed Implementation

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0031] Refer to the following Figures 1 to 6 This invention introduces the intercone fusion device provided by this utility model.

[0032] like Figure 1 , Figure 2 As shown, the intercondylar fusion device provided by this utility model includes a frame body, which is made of tantalum-containing medical ceramic. Medical ceramics have high strength, allowing them to better withstand human body pressure and physiological loads, and also possess strong corrosion resistance, enabling them to adapt to the human body environment. Simultaneously, both medical ceramics and tantalum have good chemical stability, and tantalum also has radiopaque properties, ensuring that the frame body will not react harmfully with various substances in the human body and can be visualized under the action of imaging equipment such as C-arm machines, facilitating subsequent examinations.

[0033] Specifically, the frame includes two first parts 11, one second part 12, and one third part 13. The two first parts 11 are parallel and spaced apart. Each first part 11 has a first end and a second end spaced apart. The two first ends are fixedly connected by the second part 12, and the two second ends are fixedly connected by the third part 13. The first parts 11, the second part 12, and the third part 13 enclose a bone graft window 100, which serves as the placement location for the bone graft. Through the bone graft window 100, autologous bone graft material or artificial bone material can be injected into the frame, thereby promoting bone fusion and improving the bonding strength and stability between the intercondylar fusion device and the bone tissue. Furthermore, at least the first part 11 is provided with a bone growth promoting structure. The bone growth promoting structure includes a trabecular bone structure 201 or a multi-perforated structure 202. Both the trabecular bone structure 201 and the multi-perforated structure 202 have perforations that promote bone growth, which can better promote bone growth and healing, and improve the bonding strength and stability between the intercondylar fusion device and the bone tissue.

[0034] By using tantalum-containing medical ceramic components, this intercondylar fusion device possesses excellent mechanical and corrosion resistance properties, superior biocompatibility, shortens the initial implantation time, and enables imaging at a lower cost. Furthermore, by forming a bone graft window 100 in the frame component and setting a bone growth promoting structure, it can achieve better bone growth and fusion promotion effects, thereby effectively improving the bonding force and stability between the fusion device and bone tissue.

[0035] More specifically, in this embodiment, the tantalum-containing medical ceramic part includes a medical ceramic part containing tantalum wire, a medical ceramic part containing tantalum powder, and a medical ceramic part containing tantalum sheet. For example, taking tantalum powder as an example, in the production of the tantalum-containing medical ceramic part, by adding a small amount of tantalum powder to the ceramic powder, the tantalum-containing medical ceramic part can be integrally formed by 3D printing, and the tantalum powder is stably constrained within the medical ceramic part, thus bonding the two materials together. It should be noted that this utility model does not specifically limit the content of tantalum wire, tantalum powder, and tantalum sheet, as long as they can achieve the desired imaging effect.

[0036] Preferably, the tantalum-containing medical ceramic component is a medical ceramic component containing tantalum wire or a medical ceramic component containing tantalum sheet. Tantalum wire or tantalum sheet has superior toughness, which can further enhance the load-bearing capacity of the frame. Of course, in some embodiments, tantalum powder and tantalum wire, or tantalum powder and tantalum sheet, or tantalum powder, tantalum wire, and tantalum sheet, etc., can also be added to the ceramic powder; this invention does not specifically limit this.

[0037] like Figure 1 , Figure 2As shown, in the first embodiment provided by this utility model, the first part 11, the second part 12, and the third part 13 (i.e., the position close to the bone graft window 100) of the interbody fusion device are all provided with trabecular bone structures 201. The trabecular bone structures 201 are similar in structure to the trabecular bone of the vertebral body of the spine, and have a better bone induction effect.

[0038] like Figure 3 As shown, in the second embodiment provided by this utility model, the first part 11 and the third part 13 of the intercondylar fusion device are provided with a multi-hole structure 202. The multi-hole structure 202 also has a certain bone induction effect, which can promote bone growth. Moreover, it is simpler than the trabecular bone structure 201, which can reduce the processing cost.

[0039] Continue to refer to Figure 3 As shown, the multi-hole structure 202 includes multiple parallel circular holes arranged in a regular pattern. The strategic placement of these holes can reduce stress concentration. Preferably, the circular holes include multiple first circular holes 2021 with their axes aligned along a first direction and multiple second circular holes 2022 with their axes aligned along a second direction, with the first and second directions perpendicular to each other. By setting the first and second circular holes 2021 and 2022 perpendicularly, bone tissue can grow in different directions and integrate with the intercondylar fusion device, thereby improving the bonding strength and stability between the intercondylar fusion device and the bone tissue.

[0040] More preferably, refer to Figure 4 As shown, in this embodiment, the first circular hole 2021 and the second circular hole 2022 are connected, so that the bone tissue can extend into the first circular hole 2021 and the second circular hole 2022 during the growth process and eventually fuse with itself, thereby further improving the bonding force and stability between the intercondylar fusion device and the bone tissue.

[0041] like Figure 2 , Figure 3 As shown, the second part 12 of the frame is provided with a tool mating port 121, which includes an implantation port and an implantation groove, facilitating tool clamping. The implantation port can be a threaded hole.

[0042] Preferably, the tool fitting opening 121 is located at the end of the second part 12 away from the bone growth promoting structure to improve the force-bearing performance of the implantation opening, implantation groove, and other structures. For example, as shown... Figure 3 As shown, in this embodiment, the second part 12 is provided with a tool fitting port 121, and the multi-hole structure 202 is only provided in the first part 11 and the third part 13.

[0043] like Figure 5 , Figure 6As shown, in the above embodiment, the first part 11 is provided with anti-retraction teeth 112 and bone graft fusion holes 111. The anti-retraction teeth 112 are provided on the upper and lower sides of the first part 11 to increase the friction between the intervertebral fusion device and the bone tissue, preventing the intervertebral fusion device from regressing. The bone graft fusion holes 111 facilitate the connection of instruments to the intervertebral fusion device, thereby facilitating the installation of the intervertebral fusion device.

[0044] Example:

[0045] like Figures 1 to 2 As shown, the first intercondylar fusion device provided by this utility model includes a frame body, which is made of tantalum-containing medical ceramic. The frame body includes a first part 11, a second part 12, and a third part 13. The two first parts 11 are parallel and spaced apart. Each first part 11 has a first end and a second end spaced apart. The two first ends are fixedly connected by the second part 12, and the two second ends are fixedly connected by the third part 13. Anti-retraction teeth 112 are provided on the upper and lower sides of the first part 11, and bone graft fusion holes 111 are provided on the side of the first part 11. The second part 12 is provided with a tool fitting port 121. The first part 11, the second part 12, and the third part 13 enclose each other to form a bone graft window 100. The first part 11 and the third part 13 are provided with trabecular bone structures 201, and the end of the second part 12 away from the tool fitting port 121 is also provided with a trabecular bone structure 201.

[0046] like Figures 3 to 6 As shown, the second type of intercondylar fusion device provided by this utility model includes a frame body, which is made of tantalum-containing medical ceramic. The frame body includes a first part 11, a second part 12, and a third part 13. The two first parts 11 are parallel and spaced apart. The first part 11 has a first end and a second end spaced apart. The two first ends are fixedly connected by the second part 12, and the two second ends are fixedly connected by the third part 13. Anti-retraction teeth 112 are provided on the upper and lower sides of the first part 11, and bone graft fusion holes 111 are provided on the side of the first part 11. The second part 12 is provided with a tool fitting port 121. The first part 11, the second part 12, and the third part 13 enclose each other to form a bone graft window 100. Only the first part 11 and the third part 13 are provided with a multi-circular hole structure 202. The multi-circular hole structure 202 includes multiple first circular holes 2021 with their axes arranged along a first direction and multiple second circular holes 2022 with their axes arranged along a second direction. The first circular holes 2021 and the second circular holes 2022 are perpendicular and connected.

[0047] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An intervertebral fusion device for implantation in an intervertebral disc, characterized in that: The intervertebral fusion device comprises a frame body, the frame body adopts a tantalum-containing medical ceramic, the frame body comprises two first parts (11), a second part (12) and a third part (13), the two first parts (11) are parallel and spaced apart, the first part (11) has a first end and a second end spaced apart, the two first ends are fixedly connected by the second part (12), the two second ends are fixedly connected by the third part (13), the first part (11), the second part (12) and the third part (13) enclose a bone grafting window (100), and at least the first part (11) is provided with a bone growth promoting structure.

2. The intervertebral fusion cage according to claim 1, characterized in that: The tantalum-containing medical ceramic component includes a medical ceramic component containing tantalum wire.

3. The intervertebral fusion cage according to claim 1, characterized in that: The tantalum-containing medical ceramic component comprises a medical ceramic component containing tantalum powder.

4. The intervertebral fusion cage according to claim 1, characterized in that: The tantalum-containing medical ceramic component includes a tantalum-containing medical ceramic component.

5. The intervertebral fusion cage according to any one of claims 1 to 4, characterized in that: The bone growth promoting structure comprises a trabecular structure (201); and / or, The bone growth promoting structure includes a multi-porous structure (202).

6. The intervertebral fusion cage according to claim 5, characterized in that: The multi-circular hole structure (202) comprises a plurality of circular holes arranged in parallel.

7. The intervertebral fusion cage according to claim 6, characterized in that: The multi-circular hole structure (202) comprises a plurality of first circular holes (2021) whose axes are arranged along a first direction and a plurality of second circular holes (2022) whose axes are arranged along a second direction, and the first direction and the second direction are perpendicular to each other.

8. The intervertebral fusion cage according to claim 7, characterized in that: The first circular hole (2021) and the second circular hole (2022) are arranged in communication.

9. The intervertebral fusion cage according to claim 7, characterized in that: The second part (12) is provided with a tool matching opening (121), and the multi-circular hole structure (202) is only provided on the first part (11) and the third part (13).

10. The intervertebral fusion cage according to claim 7, characterized in that: The first part (11) is provided with anti-retrogression teeth (112) and bone grafting fusion holes (111), wherein the anti-retrogression teeth (112) are used to prevent the intervertebral fusion device from retrogressing, and the bone grafting fusion holes (111) are used to promote bone fusion.

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