An xlif interbody fusion cage

Abstract

This application provides an XLIF interbody fusion cage, relating to the field of XLIF surgical technology, comprising: a first plate wall, a second plate wall, and lateral support walls; the first and second plate walls are located on opposite sides of the XLIF interbody fusion cage, connected by the lateral support walls; a bone graft chamber is formed within the XLIF interbody fusion cage; the edge contour of the first plate wall includes a straight segment and an arc segment on the same horizontal plane; no holes are formed in the first plate wall; a support beam is provided within the bone graft chamber, one end of the support beam being connected to the first plate wall and the other end to the second plate wall. This application better conforms to the vertebral body structure, has a larger product volume, and provides a larger contact area between the first and second plate walls and the two endplate cartilages within the intervertebral space, effectively dispersing stress loads and reducing the incidence of XLIF interbody fusion cage subsidence. The support beam further stabilizes the overall structure of the XLIF interbody fusion cage, preventing deformation or damage during implantation.

Description

Technical Field

[0001] This utility model relates to the field of XLIF surgical technology, and in particular to an XLIF interbody fusion device. Background Technology

[0002] XLIF surgery can be used to treat conditions such as intervertebral disc degeneration, segmental spinal instability, degenerative scoliosis, and pseudoarthrosis. The XLIF procedure involves making an incision of 3-6 cm on the side of the patient's lower back. The skin and subcutaneous tissue are cut open, and the soft tissues, including muscles, are dissected layer by layer to expose the anterior lateral structures of the lumbar vertebrae, including the transverse processes, vertebral bodies, and intervertebral spaces. Using surgical instruments such as bone forceps and curettes, degenerated and herniated disc tissue and some of the superior and inferior endplate cartilage are gradually removed from the intervertebral space to create space for subsequent intervertebral fusion and relieve pressure on the nerve roots caused by disc herniation. The pre-prepared XLIF intervertebral fusion device, containing bone graft material (such as autologous bone, allogeneic bone, or bone substitutes), is then implanted into the intervertebral space to achieve bone fusion.

[0003] Current interbody fusion cages are mostly rectangular in shape, which cannot conform well to the vertebral body or stabilize within the intervertebral space. Their limited contact area with the vertebral endplates leads to concentrated stress loads, increasing the incidence of cage subsidence and affecting surgical outcomes and patient recovery. Furthermore, the insufficient stability of the internal structure of existing fusion cages poses a risk of damage or deformation during implantation, impacting the cage's stability and lifespan. Utility Model Content

[0004] To address the above issues, this invention provides an XLIF interbody fusion cage, aiming to solve the problems of current fusion cages, which are mostly rectangular in shape and cannot properly conform to the vertebral body or stabilize within the intervertebral space. The limited contact area with the vertebral endplate leads to stress load concentration, increasing the incidence of interbody fusion cage subsidence and affecting surgical treatment outcomes and patient recovery. Furthermore, the insufficient stability of the internal structure of existing fusion cages poses a risk of damage or deformation during implantation, affecting the stability and lifespan of the fusion cage.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model provides an XLIF interbody fusion cage, including a first connecting plate wall, a second connecting plate wall, and a lateral support wall; the first connecting plate wall and the second connecting plate wall are located on opposite sides of the XLIF interbody fusion cage, and are connected by the lateral support wall; the first connecting plate wall, the second connecting plate wall, and the lateral support wall together form a bone graft chamber within the XLIF interbody fusion cage; wherein:

[0007] The edge profile of the first connecting plate wall includes a straight section and an arc section located on the same horizontal plane. The two ends of the arc section are connected to the two ends of the straight section to form a closed loop profile.

[0008] No holes are made in the first joint plate wall;

[0009] The bone graft chamber is equipped with a support beam, one end of which is connected to the first connecting plate wall and the other end is connected to the second connecting plate wall.

[0010] In some embodiments of this utility model, the second connecting plate wall is obtained after the first connecting plate wall is offset along a specified direction.

[0011] In some embodiments of this utility model, multiple anti-slip teeth are distributed on the outer side of the first connecting plate wall.

[0012] In some embodiments of this invention, the top of the anti-slip teeth is flat or arc-shaped.

[0013] In some embodiments of this utility model, the cross-section of the support beam is triangular or "D" shaped.

[0014] In some embodiments of this utility model, threaded holes are provided on the side support wall.

[0015] In some embodiments of this utility model, clamping grooves are arranged on opposite sides of the threaded hole, and the clamping grooves are located on the side support wall.

[0016] In some embodiments of this utility model, the middle part of the arc segment has a straight portion, which is parallel to the straight segment.

[0017] In some embodiments of this utility model, the straight segment and the arc segment are not located on the same horizontal plane, but are distributed at different heights.

[0018] In some embodiments of this invention, a developing pin is also included.

[0019] The embodiments of this utility model have at least the following advantages or beneficial effects:

[0020] 1. In this embodiment, the first and second connecting plates are roughly "D" shaped, and no holes are made in the first and second connecting plates. Compared with the prior art, which sets the XLIF interbody fusion device as a cuboid with holes in the contact surface with the vertebral endplate, this is more in line with the vertebral structure, the product volume is larger, and the contact area between the first and second connecting plates and the two endplate cartilages in the intervertebral space is larger, which can effectively disperse stress load and reduce the incidence of XLIF interbody fusion device subsidence.

[0021] 2. The support beams make the overall structure of the XLIF interbody fusion cage more stable, preventing deformation or damage during implantation.

[0022] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A three-dimensional structural diagram of the XLIF interbody fusion device;

[0025] Figure 2 (a) shows the internal structure of the XLIF interbody fusion device, (b) is the left view of (a), (c) is the right view of (a), (d) is the bottom view of (a), and (e) is the top view of (a).

[0026] Icons: 1-First connecting plate wall, 11-Straight section, 12-Arc-shaped section, 121-Straight part, 13-Anti-slip teeth, 2-Second connecting plate wall, 3-Side support wall, 4-Bone graft chamber, 5-Support beam, 6-Threaded hole, 7-Clamping groove, 8-Illuminating nail. Detailed Implementation

[0027] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention.

[0028] In the description of the embodiments of this utility model, it should be understood that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of 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. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0031] The embodiments of this utility model will be described in detail below.

[0032] Example 1

[0033] See Figures 1-2 This embodiment provides an XLIF interbody fusion device, including a first connecting plate wall 1, a second connecting plate wall 2, and a lateral support wall 3.

[0034] The first connecting plate wall 1 and the second connecting plate wall 2 are located on opposite sides of the XLIF interbody fusion cage (in Figure 1 In the state shown, the first connecting plate wall 1 is located on the upper side of the XLIF interbody fusion cage, and the second connecting plate wall 2 is located on the lower side of the XLIF interbody fusion cage. The first connecting plate wall 1 and the second connecting plate wall 2 are connected by the side support wall 3. After the first connecting plate wall 1, the second connecting plate wall 2 and the side support wall 3 are together enclosed, a bone graft chamber 4 is formed in the XLIF interbody fusion cage.

[0035] After the XLIF intervertebral fusion cage is placed into the intervertebral space, the first plate wall 1 and the second plate wall 2 contact the upper and lower endplate cartilages in the intervertebral space, respectively. Fixing the XLIF intervertebral fusion cage can provide support to maintain the size of the intervertebral space.

[0036] To conform to the vertebral structure, the edge contour of the first connecting plate wall 1 is roughly "D" shaped. Specifically, the edge contour of the first connecting plate wall 1 includes a straight segment 11 and an arc segment 12 located on the same horizontal plane. The two ends of the arc segment 12 are connected to the two ends of the straight segment 11 to form a closed loop contour. The shape and size of the second connecting plate wall 2 are adapted to the shape and size of the first connecting plate wall 1. In this embodiment, the first connecting plate wall 1 and the second connecting plate wall 2 have the same shape and size. The second connecting plate wall 2 is obtained by offsetting the first connecting plate wall 1 in a specified direction (downward).

[0037] In this embodiment, the first connecting plate wall 1 and the second connecting plate wall 2 are roughly "D" shaped, and no holes are made in the first connecting plate wall 1 and the second connecting plate wall 2. Compared with the prior art, which sets the XLIF interbody fusion device as a cuboid with holes in the contact surface with the vertebral endplate, this is more in line with the vertebral structure, the product volume is larger, and the contact area between the first connecting plate wall 1 and the second connecting plate wall 2 and the two endplate cartilages in the intervertebral space is larger, which can effectively disperse stress load and reduce the incidence of XLIF interbody fusion device subsidence.

[0038] Multiple anti-slip teeth 13 are distributed on the outer side of the first connecting plate wall 1 and the outer side of the second connecting plate wall 2, which helps to maintain the stability of the XLIF intervertebral fusion device in the patient's intervertebral space.

[0039] Furthermore, the top of the anti-slip tooth 13 is flat and parallel to the first connecting plate wall 1. Compared to making the top of the anti-slip tooth 13 sharp, the top of the anti-slip tooth 13 is less prone to wear, and the height of the top of the anti-slip tooth 13 is less likely to be lost, which is more conducive to maintaining the size of the intervertebral space. In other embodiments, the top of the anti-slip tooth 13 may also be arc-shaped.

[0040] A support beam 5 is installed inside the bone graft chamber 4. One end of the support beam 5 is connected to the first connecting plate wall 1, and the other end is connected to the second connecting plate wall 2. In this embodiment, the cross-section of the support beam 5 is triangular or "D" shaped. The support beam 5 makes the overall structure of the XLIF interbody fusion device more stable, avoiding deformation or damage during implantation.

[0041] To facilitate the fixation and clamping of the XLIF interbody fusion device, threaded holes 6 are provided on the side support wall 3, and clamping grooves 7 are arranged on the opposite sides of the threaded holes 6.

[0042] Example 2

[0043] See Figures 1-2 The difference between this embodiment and embodiment 1 is that the straight section 11 and the arc section 12 are not located on the same horizontal plane, but are distributed at different heights. Specifically, the arc section 12 is located above the straight section 11. In this way, the first connecting plate wall 1 has a predetermined slope (such as a 5° slope), which can adapt to more situations and patients.

[0044] Example 3

[0045] See Figures 1-2 The difference between this embodiment and embodiment 1 is that in this embodiment, the middle part of the arc segment 12 has a straight portion 121, which is parallel to the straight segment 11.

[0046] To facilitate clear visualization during imaging examinations (such as X-rays and CT scans), multiple imaging screws 8 are distributed within the XLIF interbody fusion cage. In this embodiment, there are three imaging screws 8, one of which is located near the straight portion 121, and the other two are located near the two ends of the straight segment 11. This layout better reflects the overall shape and size of the XLIF interbody fusion cage.

[0047] Finally, it should be noted that the above are merely preferred embodiments of this application and are not intended to limit this application. For those skilled in the art, this application can have various modifications and variations. Without conflict, the embodiments and features described in the embodiments of this application can be arbitrarily combined with each other. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An XLIF interbody cage, comprising: The XLIF interbody fusion cage includes a first connecting plate wall, a second connecting plate wall, and a lateral support wall; the first connecting plate wall and the second connecting plate wall are located on opposite sides of the XLIF interbody fusion cage, and are connected by the lateral support wall; the first connecting plate wall, the second connecting plate wall, and the lateral support wall together form a bone graft chamber within the XLIF interbody fusion cage; wherein: The edge contour of the first connecting plate wall includes a straight segment and an arc segment located on the same horizontal plane. The two ends of the arc segment are connected to the two ends of the straight segment to form a closed loop contour. No holes are made in the wall of the first connecting plate; The bone graft chamber is equipped with a support beam, one end of which is connected to the first connecting plate wall and the other end of which is connected to the second connecting plate wall.

2. The XLIF interbody cage of claim 1, wherein, The second connecting plate wall is obtained by offsetting the first connecting plate wall in a specified direction.

3. The XLIF interbody fusion device according to claim 1, characterized in that, The outer side of the first connecting plate wall has multiple anti-slip teeth.

4. The XLIF interbody fusion device according to claim 3, characterized in that, The top of the anti-slip teeth is either flat or arc-shaped.

5. The XLIF interbody fusion device according to claim 1, characterized in that, The cross-section of the support beam is triangular or "D" shaped.

6. The XLIF interbody fusion device according to claim 1, characterized in that, The side support wall has threaded holes.

7. The XLIF interbody fusion device according to claim 6, characterized in that, Clamping grooves are arranged on opposite sides of the threaded hole, and the clamping grooves are located on the side support wall.

8. The XLIF interbody fusion device according to claim 1, characterized in that, The arc-shaped segment has a straight portion in the middle, which is parallel to the straight segment.

9. The XLIF interbody fusion device according to claim 1, characterized in that, It also includes developing nails.

10. The XLIF interbody fusion device according to any one of claims 1 to 9, characterized in that, The straight section and the curved section are not located on the same horizontal plane, and they are distributed at different heights.

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