Self-stabilizing TLIF fusion cage

Abstract

The invention belongs to the technical field of medical instruments, and relates to a self-stabilizing TLIF fusion cage which comprises a fusion cage body and anchoring elements arranged on the upper side and the lower side of the fusion cage body. The open groove and end plate grooves in the upper side and the lower side of the fusion cage body form two installation channels matched with the two anchoring elements respectively, one end of each anchoring element is matched in the open groove through a wide part, and the other end of each anchoring element penetrates through the end plate grooves through the tip end to extend in the direction away from the upper side or the lower side of the fusion cage body. The anchoring element is further provided with an elastic barb matched with the end plate groove and an anti-retreating barb arranged between the tip end and the elastic barb. The fusion cage body can be connected with the vertebral body through the anchoring element, so that use of pedicle screws and the like for auxiliary fixation is avoided; due to the fact that extra auxiliary fixation is not needed, incisions in an operation can be effectively reduced, recovery time is shortened, and economic pressure of a patient is reduced.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically relating to a self-stabilizing TLIF fusion device. Background Technology

[0002] Transforaminal lumbar interbody fusion (TLIF) is a minimally invasive procedure that involves making a small incision through the intervertebral foramen to access the intervertebral space and perform lumbar fusion. Traditional TLIF fusion devices lack their own anchoring elements and require the insertion of pedicle screws for auxiliary fixation. However, the pedicles of the vertebrae above and below the patient need to be exposed before pedicle screw insertion, inevitably increasing the surgical incision and muscle dissection, thus increasing the difficulty of the surgery and prolonging recovery time. Furthermore, the need for additional pedicle screws for auxiliary fixation also increases the financial burden on the patient. Summary of the Invention

[0003] The purpose of this invention is to address the defects and shortcomings of existing technologies by designing a self-stabilizing TLIF fusion device that can provide stable support, improve fusion rate, reduce surgical pain, and reduce the economic burden on patients.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a self-stabilizing TLIF fusion device, comprising a fusion device body and anchoring elements disposed on the upper and lower sides of the fusion device body. The fusion device body has an opening groove at its proximal end, and the opening groove and the end plate grooves on the upper and lower sides of the fusion device body respectively form two installation channels that cooperate with the two anchoring elements. One end of the anchoring element is fitted into the opening groove through its wide portion, and the other end extends away from the upper or lower side of the fusion device body through its pointed end through the end plate groove. The anchoring element also has elastic barbs that cooperate with the end plate groove, and anti-backlash barbs disposed between the pointed end and the elastic barbs.

[0005] Preferably, the widths of the wide portion, the elastic barb, and the anti-reverse barb are arranged in descending order, and the width of the wide portion is greater than the width of the opening groove, and the width of the elastic barb is greater than the width of the end plate groove.

[0006] Preferably, the anchoring element has an arc-shaped design, gradually curving away from the fusion unit body from its widest part to its tip.

[0007] Preferably, the opening direction of the anti-reverse barbs and the elastic barbs is opposite to the extension direction of the anchoring element.

[0008] Preferably, the fusion unit body has a "C" shaped structure design, with one side being concave and the other side being convex, and the two mounting channels are designed to be inclined from the concave end to the convex end.

[0009] Preferably, the fusion device body includes a main body segment and a head segment. The upper and lower surfaces of the main body segment are provided with a first tooth-shaped structure, and the upper and lower surfaces of the head segment are curved. The upper and lower surfaces of the head segment are also provided with a second tooth-shaped structure.

[0010] Preferably, the first toothed structure has an arc-shaped groove at its bottom, and the second toothed structure forms an inclined guide extending toward the distal end of the fusion body.

[0011] Preferably, the main body segment of the fusion device is also provided with a through groove.

[0012] Preferably, the near end of the fusion device body is also provided with a threaded hole.

[0013] After adopting the above technical solution, the self-stabilizing TLIF fusion device provided by the present invention has the following beneficial effects: This invention, through the design of anchoring elements, can connect the fusion device body to the vertebral body, thereby avoiding the use of auxiliary fixation such as pedicle screws; since no additional auxiliary fixation is required, it can effectively reduce intraoperative incisions, shorten recovery time, and reduce the economic burden on patients. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of a self-stabilizing TLIF fusion device according to the present invention; Figure 2 This is a side view of a self-stabilizing TLIF fusion device according to the present invention; Figure 3 This is a schematic diagram of the structure of the fusion device body in this invention; Figure 4 This is a schematic diagram of the anchoring element in this invention.

[0015] The components include: 1. Fusion body; 2. Anchoring element; 3. Opening groove; 4. End plate groove; 5. Wide section; 6. Tip; 7. Elastic barb; 8. Anti-reverse barb; 9. Main body section; 10. Head section; 11. First tooth structure; 12. Second tooth structure; 13. Through groove; 14. Threaded hole. Detailed Implementation

[0016] The present invention will now be described more clearly and completely with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0017] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0018] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0019] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0020] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0021] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0022] This invention provides a self-stabilizing TLIF fusion converter, such as... Figure 1-4 As shown, the device includes a fusion body 1 and anchoring elements 2 disposed on the upper and lower sides of the fusion body. The fusion body 1 has an opening groove 3 near its proximal end. The opening groove 3 and the end plate grooves 4 on the upper and lower sides of the fusion body 1 respectively form two installation channels that cooperate with the two anchoring elements 2. One end of the anchoring element 2 is fitted into the opening groove 3 through a wide portion 5, and the other end extends away from the upper or lower side of the fusion body 1 through the end plate groove 4 through a pointed tip 6. The anchoring element 2 also has an elastic barb 7 that cooperates with the end plate groove 4, and an anti-backward barb 8 disposed between the pointed tip 6 and the elastic barb 7.

[0023] The widths of the wide portion 5, the elastic barb 7, and the anti-reverse barb 8 are arranged in descending order, with the width of the wide portion 5 being greater than the width of the opening groove 3, and the width of the elastic barb 7 being greater than the width of the end plate groove 4. This facilitates insertion and allows the wide portion 5 and the elastic barb 7 to work together to fix one end of the anchoring element 2 to the fusion body 1, preventing the anchoring element 2 from moving left and right. Furthermore, the anchoring element 2 has an arc-shaped design, gradually bending away from the fusion body 1 from the wide portion 5 to the tip 6. The opening directions of the anti-reverse barb 8 and the elastic barb 7 are opposite to the extension direction of the anchoring element 2, providing a better anti-reverse function.

[0024] The fusion body 1 has a "C" shaped structure design, with one side being concave and the other side being convex. The two mounting channels are designed to slope from the concave end to the convex end. Furthermore, the fusion body 1 includes a main body segment 9 and a head segment 10. The upper and lower surfaces of the main body segment 9 are provided with a first tooth structure 11. The upper and lower surfaces of the head segment 10 are curved and are provided with a second tooth structure 12. The bottom of the first tooth structure 11 is provided with an arc-shaped groove. The second tooth structure 12 forms an inclined guide extending towards the distal end of the fusion body 1. The main body segment 9 of the fusion body 1 is also provided with a through groove 13, and the proximal end of the fusion body 1 is also provided with a threaded hole 14.

[0025] In summary, the self-stabilizing TLIF fusion device provided by this invention can connect the fusion device body to the vertebral body through anchoring elements, thereby avoiding the use of auxiliary fixation such as pedicle screws. Since no additional auxiliary fixation is required, it can effectively reduce intraoperative incisions, shorten recovery time, and reduce the economic burden on patients. It has great market value and is worthy of widespread promotion and application.

[0026] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A self-stable TLIF cage, characterized by: The application relates to a fusion cage, which comprises a fusion cage body (1) and anchor elements (2) arranged on the upper and lower sides of the fusion cage body, wherein the proximal end of the fusion cage body (1) is provided with an open slot (3), the open slot (3) and end plate slots (4) on the upper and lower sides of the fusion cage body (1) respectively form two installation channels matched with the two anchor elements (2), one end of the anchor element (2) is matched in the open slot (3) through a wide part (5), the other end extends in a direction away from the upper or lower side of the fusion cage body (1) through a pointed end (6) passing through the end plate slot (4), the anchor element (2) is further provided with elastic barbs (7) matched with the end plate slots (4), and a retreat-preventing barb (8) is arranged between the pointed end (6) and the elastic barb (7).

2. The self-stable TLIF cage of claim 1, wherein: The wide part (5), the elastic barb (7) and the retreat-preventing barb (8) are arranged in a descending order of width, and the width of the wide part (5) is larger than the width of the open slot (3), and the width of the elastic barb (7) is larger than the width of the end plate slot (4).

3. The self-stable TLIF cage of claim 1, wherein: The anchor element (2) is designed in an arc shape, and gradually bends away from the fusion cage body (1) from the wide part (5) to the pointed end (6).

4. The self-stable TLIF cage of claim 1, wherein: The opening directions of the retreat-preventing barb (8) and the elastic barb (7) are opposite to the extending direction of the anchor element (2).

5. The self-stable TLIF cage of claim 1, wherein: The fusion cage body (1) is designed in a C-shaped structure, one side is concave, and the other side is convex, and the two installation channels are respectively designed to be inclined from one end of the concave side to the convex side.

6. The self-stable TLIF cage of claim 1, wherein: The fusion cage body (1) comprises a main body section (9) and a head section (10), the upper and lower surfaces of the main body section (9) are provided with first tooth-shaped structures (11), the upper and lower surfaces of the head section (10) are designed in a curved surface, and the upper and lower surfaces of the head section (10) are provided with second tooth-shaped structures (12).

7. A self-stable TLIF cage according to claim 6, wherein: The bottom of the first tooth-shaped structure (11) is provided with a circular-arc-shaped groove, and the second tooth-shaped structure (12) forms an inclined guide extending to the distal end of the fusion cage body (1).

8. The self-stable TLIF cage of claim 6, wherein: The main body section (9) of the fusion cage body (1) is further provided with a through slot (13).

9. The self-stable TLIF cage of claim 1, wherein: The proximal end of the fusion cage body (1) is further provided with a threaded hole (14).

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