Anti-collapse end plate reinforced interbody fusion cage

Abstract

The utility model provides an anti-collapse end plate reinforced interbody fusion cage, and belongs to the technical field of spine fusion cages. The anti-collapse end plate reinforced interbody fusion cage comprises an upper reinforcing plate, a middle fusion cage body and a lower reinforcing plate, the upper reinforcing plate is arranged on the upper end face of an intervertebral space, the lower reinforcing plate is arranged on the lower end face of the intervertebral space, and the middle fusion cage body is arranged between the upper reinforcing plate and the lower reinforcing plate in a sliding mode. The anti-collapse end plate reinforced interbody fusion cage is provided with the upper reinforcing plate, the middle fusion cage body and the lower reinforcing plate which are sequentially arranged in the intervertebral space of a patient from top to bottom, the contact area between the upper reinforcing plate and the vertebra surface and the contact pressure between the lower reinforcing plate and the vertebra surface are large, the upper reinforcing plate effectively supports the vertebra, and therefore the interbody fusion cage can effectively support the vertebra. The local pressure of the lower reinforcing plate on the vertebra surface is reduced, and the probability of end plate cutting, collapse and fracture is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of spinal fusion devices, and in particular relates to an anti-collapse end plate reinforced intervertebral fusion device. Background Art

[0002] Lumbar degenerative disease is a common orthopedic disease, including lumbar disc herniation, lumbar spinal stenosis, lumbar spondylolisthesis and lumbar degenerative scoliosis. Patients with lumbar degenerative disease are mostly elderly patients, especially those with degenerative scoliosis, who often have multiple medical complications. During the treatment process, it is often necessary to implant an intervertebral fusion device in the patient's lumbar spine to achieve intervertebral space distraction, spinal canal expansion and intervertebral space rebalancing, thereby correcting the overall coronal and sagittal balance of the spine. The implantation of the fusion device requires a good support structure of the vertebral endplate, cortical bone and cancellous bone. However, most patients with lumbar degenerative disease have osteoporosis. After the fusion device is implanted, the surface stress is too large, and displacement and sinking may occur. The matching degree between the fusion device surface and the endplate is poor. During and after the operation, problems such as endplate cutting, collapse and even fracture are prone to occur. The intervertebral space cannot be effectively distracted, and the stability of the surgical segment is reduced, which seriously affects the surgical effect and may even require a second operation. Utility Model Content

[0003] The purpose of the utility model is to provide an anti-collapse end plate reinforced intervertebral fusion device, aiming to solve the problem that the end plate is easily cut, collapsed and fractured after the fusion device is implanted.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide an anti-collapse end plate reinforced intervertebral fusion device, including an upper reinforcing plate, an intermediate fusion device and a lower reinforcing plate, the upper reinforcing plate is arranged on the upper end surface of the intervertebral space, the lower reinforcing plate is arranged on the lower end surface of the intervertebral space, and the intermediate fusion device is slidably arranged between the upper reinforcing plate and the lower reinforcing plate.

[0005] In a possible implementation, an upper fixing nail plate is provided at the tail end of the upper reinforcing plate, and a lower fixing nail plate is provided at the tail end of the lower reinforcing plate. The upper fixing nail plate and the lower fixing nail plate are fixed to the side wall of the vertebra by fixing screws.

[0006] In a possible implementation, an upper sliding block is provided on the upper end surface of the intermediate fusion device and is arranged along the length direction of the intermediate fusion device, and an upper sliding groove matching the upper sliding block is provided on the lower end surface of the upper reinforcing plate.

[0007] In a possible implementation, an upper baffle is provided on the lower end surface of the upper reinforcing plate, and two groups of the upper baffles are provided along the length direction of the upper reinforcing plate and on both sides of the lower end surface of the upper reinforcing plate.

[0008] In a possible implementation, a side wall of the intermediate fusion cage is provided with a clearance groove matching the upper stop bar.

[0009] In a possible implementation, an upper limit block is provided at the front end of the upper reinforcing plate to limit the position of the intermediate fusion device.

[0010] In a possible implementation, the upper end surface of the upper reinforcing plate is arranged to fit the lower end surface of the upper vertebra in the intervertebral space, and the lower end surface of the lower reinforcing plate is arranged to fit the upper end surface of the lower vertebra in the intervertebral space.

[0011] In a possible implementation, both sides of the tail end of the upper reinforcing plate, both sides of the tail end of the middle fusion device, and both sides of the tail end of the lower reinforcing plate are provided with instrument clamping grooves.

[0012] In a possible implementation, the upper reinforcing plate, the middle fusion cage, and the lower reinforcing plate are provided with trabecular microporous structures that facilitate fusion.

[0013] In a possible implementation, the upper reinforcing plate, the middle fusion cage, and the lower reinforcing plate are 3D printed components.

[0014] The beneficial effects of the anti-collapse endplate reinforced intervertebral fusion cage provided by the utility model are:

[0015] Compared with the existing technology, an upper reinforcing plate, an intermediate fusion device and a lower reinforcing plate are provided. The upper reinforcing plate, the intermediate fusion device and the lower reinforcing plate are arranged in sequence from top to bottom in the patient's intervertebral space, and the intermediate fusion device is slidably arranged between the upper reinforcing plate and the lower reinforcing plate. During installation, the upper reinforcing plate is fixed to the lower end surface of the vertebra above the intervertebral space, the lower reinforcing plate is fixed to the upper end surface of the vertebra below the intervertebral space, and the intermediate fusion device is placed between the upper reinforcing plate and the lower reinforcing plate to complete the implantation of the fusion device. No bone grafting groove is provided on the upper reinforcing plate and the lower reinforcing plate. The upper reinforcing plate and the lower reinforcing plate have a large contact area with the vertebral surface and a small contact pressure. The upper reinforcing plate effectively supports the vertebra, and the local pressure of the lower reinforcing plate on the vertebral surface is reduced, thereby reducing the probability of end plate cutting, collapse and fracture. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1A schematic diagram of the right side structure of the anti-collapse endplate reinforced intervertebral fusion cage provided by an embodiment of the present invention;

[0018] Figure 2 A schematic front view of the structure of an anti-collapse endplate reinforced intervertebral fusion cage provided by an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the exploded structure of the anti-collapse endplate reinforced intervertebral fusion cage provided in an embodiment of the utility model from the front.

[0020] In the figure: 1. Upper reinforcing plate; 2. Upper fixing nail plate; 3. Upper stop bar; 4. Upper limit block; 5. Middle fusion device; 6. Upper slider; 7. Lower slider; 8. Lower reinforcing plate; 9. Lower fixing nail plate; 10. Lower stop bar; 11. Lower limit block; 12. Instrument clamping groove. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] Please refer to Figures 1 to 3 A specific embodiment of an anti-collapse endplate reinforced intervertebral fusion device provided by the utility model is now described, including an upper reinforcing plate 1, an intermediate fusion device 5 and a lower reinforcing plate 8. The upper reinforcing plate 1 is arranged on the upper end surface of the intervertebral space, the lower reinforcing plate 8 is arranged on the lower end surface of the intervertebral space, and the intermediate fusion device 5 is slidably arranged between the upper reinforcing plate 1 and the lower reinforcing plate 8.

[0023] The utility model provides an anti-collapse endplate reinforced intervertebral fusion device. Compared with the prior art, the utility model is provided with an upper reinforcing plate 1, an intermediate fusion device 5 and a lower reinforcing plate 8. The upper reinforcing plate 1, the intermediate fusion device 5 and the lower reinforcing plate 8 are sequentially arranged in the patient's intervertebral space from top to bottom, and the intermediate fusion device 5 is slidably arranged between the upper reinforcing plate 1 and the lower reinforcing plate 8. During installation, the upper reinforcing plate 1 is fixed to the lower end surface of the vertebra above the intervertebral space, the lower reinforcing plate 8 is fixed to the upper end surface of the vertebra below the intervertebral space, and the intermediate fusion device 5 is placed between the upper reinforcing plate 1 and the lower reinforcing plate 8 to complete the implantation of the fusion device. No bone grafting groove is provided on the upper reinforcing plate 1 and the lower reinforcing plate 8. The upper reinforcing plate 1 and the lower reinforcing plate 8 have a large contact area with the vertebral surface and a small contact pressure. The upper reinforcing plate 1 effectively supports the vertebra, and the lower reinforcing plate 8 reduces the local pressure on the vertebral surface, thereby reducing the probability of endplate cutting, collapse and fracture.

[0024] For details, please refer to Figures 1 to 3, including an upper reinforcing plate 1, an intermediate fusion device 5 and a lower reinforcing plate 8. The lower reinforcing plate 8 is arranged at the upper end of the vertebra below the intervertebral space, the intermediate fusion device 5 is arranged on the lower reinforcing plate 8, the upper reinforcing plate 1 is arranged on the intermediate fusion device 5, and the upper reinforcing plate 1 is arranged at the lower end of the vertebra above the intervertebral space. No bone grafting groove is arranged on the upper reinforcing plate 1 and the lower reinforcing plate 8. The intermediate fusion device 5 is slidably arranged between the upper reinforcing plate 1 and the lower reinforcing plate 8. The upper reinforcing plate 1 and the lower reinforcing plate 8 have a large contact area with the vertebral surface and a small contact pressure. The upper reinforcing plate 1 effectively supports the vertebra, and the lower reinforcing plate 8 reduces the local pressure on the vertebral surface, thereby reducing the probability of end plate cutting, collapse and fracture.

[0025] As a specific embodiment of the anti-collapse endplate reinforced intervertebral fusion device provided by the present invention, please refer to Figures 1 to 3 The tail end of the upper reinforcing plate 1 is provided with an upper fixing nail plate 2, and the tail end of the lower reinforcing plate 8 is provided with a lower fixing nail plate 9. The upper fixing nail plate 2 and the lower fixing nail plate 9 are fixed to the side wall of the vertebra by fixing screws.

[0026] For details, please refer to Figures 1 to 3 The upper fixing nail plate 2 is fixed to the tail end of the upper reinforcing plate 1, and the front end of the upper reinforcing plate 1 is implanted in the intervertebral space. The upper fixing nail plate 2 is arranged toward the top of the upper reinforcing plate 1, and the side wall of the upper fixing nail plate 2 is arranged in contact with the side wall of the vertebra. An upper bolt hole is provided on the upper fixing nail plate 2, and the fixing screw passes through the upper bolt hole to fix the upper reinforcing plate 1 to the vertebra above the intervertebral space. The lower fixing nail plate 9 is fixed to the tail end of the lower reinforcing plate 8, and the front end of the lower reinforcing plate 8 is implanted in the intervertebral space. The lower fixing nail plate 9 is arranged toward the bottom of the lower reinforcing plate 8, and the side wall of the lower fixing nail plate 9 is arranged in contact with the side wall of the vertebra. A lower bolt hole is provided on the lower fixing nail plate 9, and the fixing screw passes through the lower bolt hole to fix the lower reinforcing plate 8 to the vertebra below the intervertebral space, thereby increasing the stability of the fixation of the upper reinforcing plate 1 and the lower reinforcing plate 8, and facilitating the implantation of the intermediate fusion device 5.

[0027] As a specific embodiment of the anti-collapse endplate reinforced intervertebral fusion device provided by the present invention, please refer to Figures 1 to 3 The upper end surface of the intermediate fusion device 5 is provided with an upper slider 6, which is arranged along the length direction of the intermediate fusion device 5, and the lower end surface of the upper reinforcing plate 1 is provided with an upper slide groove matching the upper slider 6.

[0028] For details, please refer to Figures 1 to 3The upper end surface of the intermediate fusion device 5 is provided with an upper slider 6, and the lower end surface of the intermediate fusion device 5 is provided with a lower slider 7. The upper slider 6 and the lower slider 7 are arranged along the length direction of the intermediate fusion device 5, that is, from the front end to the tail end of the intermediate fusion device 5. The lower end surface of the upper reinforcing plate 1 is provided with an upper slide groove, and the upper end surface of the lower reinforcing plate 8 is provided with a lower slide groove. The upper slider 6 has the freedom to slide in the upper slide groove, and the lower slider 7 has the freedom to slide in the lower slide groove, which is convenient for the implantation of the intermediate fusion device 5.

[0029] As a specific embodiment of the anti-collapse endplate reinforced intervertebral fusion cage provided by the present invention, please refer to Figures 1 to 3 The lower end surface of the upper reinforcing plate 1 is provided with an upper baffle 3. Two groups of upper baffles 3 are provided along the length direction of the upper reinforcing plate 1 and are provided on both sides of the lower end surface of the upper reinforcing plate 1.

[0030] For details, please refer to Figures 1 to 3 The upper baffle 3 is arranged on the lower end surface of the upper reinforcing plate 1 and is arranged along the length direction of the upper reinforcing plate 1, that is, it is arranged from the front end to the tail end of the upper reinforcing plate 1. The two groups of upper baffles 3 are respectively arranged on both sides of the lower end surface of the upper reinforcing plate 1. The lower baffle 10 is arranged on the upper end surface of the lower reinforcing plate 8 and is arranged along the length direction of the lower reinforcing plate 8, that is, it is arranged from the front end to the tail end of the lower reinforcing plate 8. The two groups of lower baffles 10 are respectively arranged on both sides of the upper end surface of the lower reinforcing plate 8. The upper end of the intermediate fusion device 5 is located between the two groups of upper baffles 3, and the lower end of the intermediate fusion device 5 is located between the two groups of lower baffles 10, which facilitates the implantation of the intermediate fusion device 5.

[0031] As a specific embodiment of the anti-collapse endplate reinforced intervertebral fusion cage provided by the present invention, please refer to Figures 1 to 3 The side wall of the middle fusion device 5 is provided with a clearance groove matching the upper baffle 3.

[0032] For details, please refer to Figures 1 to 3 There are four sets of clearance grooves on both side walls of the middle fusion device 5, which are matched with the upper baffle 3 and the lower baffle 10 respectively to increase the stability of the device.

[0033] As a specific embodiment of the anti-collapse endplate reinforced intervertebral fusion device provided by the present invention, please refer to Figures 1 to 3 An upper limit block 4 is provided at the front end of the upper reinforcing plate 1 to limit the middle fusion device 5.

[0034] For details, please refer to Figures 1 to 3 The front end of the lower end surface of the upper reinforcing plate 1 is provided with an upper limit block 4, and the front end of the upper end surface of the lower reinforcing plate 8 is provided with a lower limit block 11. After the intermediate fusion device 5 is implanted, it rests against the side walls of the upper limit block 4 and the lower limit block 11 to limit the intermediate fusion device 5.

[0035] As a specific embodiment of the anti-collapse endplate reinforced intervertebral fusion device provided by the present invention, please refer to Figures 1 to 3 The upper end surface of the upper reinforcing plate 1 is arranged to fit the lower end surface of the upper vertebra in the intervertebral space, and the lower end surface of the lower reinforcing plate 8 is arranged to fit the upper end surface of the lower vertebra in the intervertebral space.

[0036] For details, please refer to Figures 1 to 3 The shape of the upper end surface of the upper reinforcing plate 1 matches the shape of the lower end surface of the upper vertebra in the intervertebral space, and the shape of the lower end surface of the lower reinforcing plate 8 matches the shape of the upper end surface of the lower vertebra in the intervertebral space. During the surgical preparation stage, the shape of the patient's vertebra is scanned, and the upper reinforcing plate 1 and the lower reinforcing plate 8 are prepared according to the scanning results to enhance the adaptability of the device to the vertebra and reduce the contact pressure between the upper reinforcing plate 1 and the lower reinforcing plate 8 and the surface of the vertebra.

[0037] As a specific embodiment of the anti-collapse endplate reinforced intervertebral fusion device provided by the present invention, please refer to Figures 1 to 3 Instrument clamping grooves 12 are provided on both sides of the tail end of the upper reinforcing plate 1, on both sides of the tail end of the middle fusion device 5, and on both sides of the tail end of the lower reinforcing plate 8.

[0038] For details, please refer to Figures 1 to 3 The tail end of the upper reinforcing plate 1, the tail end of the middle fusion device 5, and the tail end of the lower reinforcing plate 8 are all provided with instrument clamping grooves 12, which are convenient for surgical instruments to clamp the upper reinforcing plate 1, the middle fusion device 5, and the lower reinforcing plate 8.

[0039] As a specific embodiment of the anti-collapse endplate reinforced intervertebral fusion device provided by the present invention, please refer to Figures 1 to 3 The upper reinforcing plate 1, the middle fusion device 5 and the lower reinforcing plate 8 are provided with a trabecular microporous structure that facilitates fusion.

[0040] For details, please refer to Figures 1 to 3 The upper reinforcing plate 1, the middle fusion device 5 and the lower reinforcing plate 8 are provided with a trabecular microporous structure, and the trabecular microporous structure enhancement device is fused with the patient's bones.

[0041] As a specific embodiment of the anti-collapse endplate reinforced intervertebral fusion device provided by the present invention, please refer to Figures 1 to 3 The upper reinforcing plate 1, the middle fusion device 5 and the lower reinforcing plate 8 are 3D printed components.

[0042] For details, please refer to Figures 1 to 3 The upper reinforcing plate 1, the middle fusion device 5 and the lower reinforcing plate 8 are all made by 3D printing, and are manufactured according to the patient's physical data and adapted to the patient's physical condition.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An anti-collapse endplate reinforced intervertebral fusion cage, characterized in that: The invention comprises an upper reinforcing plate, an intermediate fusion device and a lower reinforcing plate. The upper reinforcing plate is arranged on the upper end surface of the intervertebral space, the lower reinforcing plate is arranged on the lower end surface of the intervertebral space, and the intermediate fusion device is slidably arranged between the upper reinforcing plate and the lower reinforcing plate.

2. The anti-collapse endplate reinforced intervertebral fusion cage according to claim 1, characterized in that: An upper fixing nail plate is provided at the tail end of the upper reinforcing plate, and a lower fixing nail plate is provided at the tail end of the lower reinforcing plate. The upper fixing nail plate and the lower fixing nail plate are fixed to the side wall of the vertebra by fixing screws.

3. The anti-collapse endplate reinforced intervertebral fusion cage according to claim 1, characterized in that: The upper end surface of the intermediate fusion device is provided with an upper sliding block arranged along the length direction of the intermediate fusion device, and the lower end surface of the upper reinforcing plate is provided with an upper sliding groove matching the upper sliding block.

4. The anti-collapse endplate reinforced intervertebral fusion cage according to claim 1, characterized in that: The lower end surface of the upper reinforcing plate is provided with an upper blocking bar, and two groups of the upper blocking bars are provided along the length direction of the upper reinforcing plate and on both sides of the lower end surface of the upper reinforcing plate.

5. The anti-collapse endplate reinforced intervertebral fusion cage according to claim 4, characterized in that: The side wall of the intermediate fusion device is provided with a clearance groove matching the upper blocking bar.

6. The anti-collapse endplate reinforced intervertebral fusion cage according to claim 1, characterized in that: An upper limit block is provided at the front end of the upper reinforcing plate to limit the middle fusion device.

7. The anti-collapse endplate reinforced intervertebral fusion cage according to claim 1, characterized in that: The upper end surface of the upper reinforcing plate is arranged to fit the lower end surface of the upper vertebra in the intervertebral space, and the lower end surface of the lower reinforcing plate is arranged to fit the upper end surface of the lower vertebra in the intervertebral space.

8. The anti-collapse endplate reinforced intervertebral fusion cage according to claim 1, characterized in that: Instrument clamping grooves are provided on both sides of the tail end of the upper reinforcing plate, on both sides of the tail end of the middle fusion device, and on both sides of the tail end of the lower reinforcing plate.

9. The anti-collapse endplate reinforced intervertebral fusion cage according to claim 1, characterized in that: The upper reinforcing plate, the middle fusion device and the lower reinforcing plate are provided with trabecular microporous structures that facilitate fusion.

10. The anti-collapse endplate reinforced intervertebral fusion cage according to claim 1, characterized in that: The upper reinforcing plate, the middle fusion device and the lower reinforcing plate are 3D printed components.

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