Gear distraction self-stabilization interbody fusion cage for lumbar vertebra side road
By designing a gear-supported self-stabilizing intervertebral fusion device, using the negative Poisson's radial and gear meshing structure, the problem of insufficient self-stabilization of traditional intervertebral fusion devices is solved, and stable connection and efficient fusion are achieved.
Patent Information
- Application Number
- CN202422209172.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-09-10
AI Technical Summary
Traditional intervertebral fusion devices lack self-stabilization function, insufficient fixation intensity, complex operation, and low patient acceptance.
A self-stabilized intervertebral fusion device for lumbar lateral circuit is designed, and a combination structure of negative Poisson's layer, rack, slot, through-hole, joystick, gear, puncture head and barb are used to mesh the rack through gear drive, and the mechanical properties are increased through negative Poisson's layer.
It realizes self-stable connection, is easy to operate, enhances the fusion effect, and improves the fixed strength and fusion rate.
Smart Images
Figure CN223220570U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical devices, in particular to a gear-supported self-stabilizing intervertebral fusion device for lumbar lateral path. Background Art
[0002] Intervertebral fusion can effectively solve cervical and lumbar intervertebral stenosis, degenerative diseases, etc. by implanting a fusion cage. Through the support of the fusion cage, the intervertebral height is restored, the intervertebral foramen is expanded, the symptoms of nerve compression are relieved, the stability of the segment is enhanced, and secondary degenerative changes in adjacent segments are avoided. It is mainly made of stainless steel, carbon alloy, PEKK, PEEK and other materials.
[0003] Traditional intervertebral fusion devices do not have a self-stabilizing function and require a steel plate or a blade to be inserted from the outside to lock, or pedicle screw fixation from the back. The steel plate is inserted from the side or the blade is inserted from the side, which has a certain head-tail angle, is difficult to operate, has insufficient fixation strength, and only has one chance. The posterior implantation of pedicle screws is very traumatic and has low patient acceptance. Utility Model Content
[0004] Based on this, the purpose of the present invention is to provide a gear-assisted self-stabilizing intervertebral fusion device for lumbar lateral fusion, so as to solve the technical problems mentioned in the above background technology.
[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a gear-supported self-stabilizing intervertebral fusion device for lumbar lateral access, comprising a device body and a mounting rod, wherein the outer surface of the device body is connected to a negative Poisson's ratio layer, and through holes are provided on one side of the outer surface of the device body and the negative Poisson's ratio layer, a rack is connected inside the through hole, and a puncture head is fixed at one end of the rack, a barb is provided on one side of the puncture head, and a slot is provided at the bottom of the device body; an operating rod is sleeved on the outside of the mounting rod, and a gear is sleeved on the outside of the operating rod.
[0006] By adopting the above technical solution, the operating rod is first put on the mounting rod, and then the mounting rod is inserted into the slot and tightened to connect the mounting rod to the fusion device body. At this time, the gear enters the slot and corresponds to the two sets of racks. Then, the fusion device body is placed in the patient's body and contacts the lumbar vertebrae. Then, the gear is rotated by rotating the operating rod. After the gear rotates, it engages with the two sets of racks, so that the two sets of racks extend from the through hole, so that the two sets of puncture heads and barbs enter the patient's lumbar vertebrae to prevent the structure from retreating and falling off. Then, the operating rod is slid to engage the gear with the other two sets of racks, so as to facilitate driving the other two sets of racks to extend from the through hole; after fixing the fusion device body, the mounting rod is rotated to separate the mounting rod from the fusion device body, and then the mounting rod and the operating rod can be removed from the patient's body; then, bone can be grafted into the fusion device body to increase the fusion rate, and the mechanical properties are increased by setting the negative Poisson's ratio layer, and a better induced fusion effect is achieved.
[0007] Furthermore, the negative Poisson's ratio layer is made of titanium alloy powder by 3D printing.
[0008] By adopting the above technical solution, the staff implanted bones into the fusion device body to increase the fusion rate, and increased the mechanical properties by setting a negative Poisson's ratio layer, and achieved a better fusion induction effect.
[0009] Furthermore, the racks, through holes, puncture heads and barbs are each provided in four groups, and the four groups of racks are all engaged with the gears.
[0010] By adopting the above technical solution, the four sets of racks are driven to move by gears, so that the four sets of puncture heads and barbs are extended. By increasing the number of puncture heads and barbs, the connection stability is increased to prevent the fusion device from falling off.
[0011] Furthermore, the mounting rod is threadedly connected to the fusion device body.
[0012] By adopting the above technical solution, the staff puts the operating rod on the mounting rod, then inserts the mounting rod into the slot and tightens it. After fixing the fusion device body, the staff fixes the fusion device body and rotates the mounting rod to separate the mounting rod from the fusion device body. After that, the staff can remove the mounting rod and the operating rod from the patient's body.
[0013] Furthermore, the diameter of the slot is larger than the diameter of the gear.
[0014] By adopting the above technical solution, since the diameter of the slot is larger than the diameter of the gear, the gear can enter and exit the fusion cage when the staff disassembles and assembles the mounting rod.
[0015] Furthermore, the operating rod is slidably connected to the mounting rod.
[0016] By adopting the above technical solution, the staff slides the operating lever to make the gear engage with the other two sets of racks, thereby facilitating driving the other two sets of racks to extend from the through hole.
[0017] Furthermore, the racks are slidably connected to the through holes, and the four groups of racks are mirror-imaged.
[0018] By adopting the above technical solution, the gear rotates and engages with the two sets of racks, so that the two sets of racks extend from the through holes. Four sets of racks are provided to respectively drive four sets of puncture heads and barbs.
[0019] Furthermore, a plurality of protrusions are provided below the outer surface of the joystick, and the plurality of protrusions are distributed in a ring array.
[0020] By adopting the above technical solution, the friction between the worker's hand and the joystick is increased by providing a plurality of protrusions, so that the worker can rotate the joystick more easily.
[0021] In summary, the present invention has the following beneficial effects:
[0022] The utility model is provided with a negative Poisson's ratio layer, a rack, a slot, a through hole, a joystick, a gear, a puncture head and a barb. First, the joystick is sleeved on the installation rod, and then the installation rod is inserted into the slot and tightened to connect the installation rod with the fusion device body. At this time, the gear enters the slot and corresponds to the two sets of racks. Then, the fusion device body is placed in the patient's body and contacts the lumbar vertebra. Then, the joystick is rotated to rotate the gear. After the gear rotates, it meshes with the two sets of racks, so that the two sets of racks extend out of the through hole, so that the two sets of puncture heads and barbs enter the patient's lumbar vertebra to prevent the structure from falling back and falling off. Then, the joystick is slid to mesh the gear with the other two sets of racks, so as to facilitate driving the other two sets of racks to extend out of the through hole. After the fusion device body is fixed, the installation rod is rotated to separate the installation rod from the fusion device body, and then the installation rod and the joystick can be taken out of the patient's body. Then, bone can be grafted into the fusion device body to increase the fusion rate. The negative Poisson's ratio layer is provided to increase the mechanical properties and provide a better fusion induction effect. The utility model is convenient to operate, has a stable connection and a good fusion effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a structural diagram of the utility model;
[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model;
[0025] Figure 3 This is a schematic diagram of the rack structure of the present utility model;
[0026] Figure 4 This is a schematic diagram of the explosion structure of the mounting rod of the utility model.
[0027] In the figure: 1. Fusion device body; 2. Mounting rod; 3. Negative Poisson's ratio layer; 4. Rack; 5. Slot; 6. Through hole; 7. Joystick; 8. Gear; 9. Protrusion; 10. Puncture head; 11. Barb. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0029] The following describes an embodiment of the present invention based on its overall structure.
[0030] Example 1:
[0031] A lumbar lateral intervertebral fusion device with gear expansion and self-stabilization, such as Figure 1-Figure 3As shown, it includes a fusion device body 1 and a mounting rod 2. The outer surface of the fusion device body 1 is connected to a negative Poisson's ratio layer 3, which is made of titanium alloy powder 3D printing. The setting of the negative Poisson's ratio layer 3 increases the mechanical properties and has a better induced fusion effect; a through hole 6 is opened on one side of the outer surface of the fusion device body 1 and the negative Poisson's ratio layer 3, and a rack 4 is connected inside the through hole 6. The rack 4 is slidably connected to the through hole 6. A puncture head 10 is fixed to one end of the rack 4, and a barb 11 is provided on one side of the puncture head 10. The rack 4, the through hole 6, the puncture head 10 and the barb 11 are all provided in four groups. The four groups of racks 4 are all engaged with the gear 8. The four groups of racks 4 are mirror-imaged. The rack 4 extends from the through hole 6, so that the puncture head 10 and the barb 11 enter the patient's lumbar vertebra to prevent the structure from retreating and falling off.
[0032] See Figures 1-4 In the above embodiment, a slot 5 is provided at the bottom of the fusion device body 1, and the diameter of the slot 5 is larger than the diameter of the gear 8. The mounting rod 2 is threadedly connected to the fusion device body 1. The staff puts the operating rod 7 on the mounting rod 2, and then installs the mounting rod 2 into the slot 5 and tightens it to connect the mounting rod 2 to the fusion device body 1; the outside of the mounting rod 2 is sleeved with the operating rod 7, and the operating rod 7 is slidably connected to the mounting rod 2. The outside of the operating rod 7 is sleeved with a gear 8, and the gear 8 is rotated by rotating the operating rod 7. After the gear 8 rotates, it engages with the two sets of racks 4, so that the two sets of racks 4 extend from the through hole 6. Then the staff slides the operating rod 7 to engage the gear 8 with the other two sets of racks 4, thereby facilitating driving the other two sets of racks 4 to extend from the through hole 6.
[0033] Example 2:
[0034] On the basis of the above embodiment 1, in order to facilitate the staff to rotate the joystick, the following settings are now adopted.
[0035] See Figures 1-4 In the above embodiment, a plurality of protrusions 9 are provided under the outer surface of the joystick 7, and the plurality of protrusions 9 are distributed in a circular array. The arrangement of the plurality of protrusions 9 increases the friction between the staff's hand and the joystick 7, so that the staff can rotate the joystick 7 more easily.
[0036] The implementation principle of the present utility model is as follows: first, the staff puts the operating rod 7 on the mounting rod 2, and then installs the staff mounting rod 2 into the slot 5 and tightens it to connect the mounting rod 2 with the fusion device body 1. At this time, the gear 8 enters the slot 5 and corresponds to the two sets of racks 4. Then the staff puts the fusion device body 1 into the patient's body and contacts the lumbar vertebrae. Then, the gear 8 rotates by rotating the operating rod 7. At the same time, the friction between the staff's hand and the operating rod 7 is increased by the provision of multiple protrusions 9, so that the staff can rotate the operating rod 7. After the gear 8 rotates, it meshes with the two sets of racks 4, so that the two sets of racks 4 extend from the through hole 6, thereby allowing the two sets of puncture heads 10 and barbs 11 to enter the patient's lumbar vertebrae to prevent the structure from falling back and falling off. Then, the staff slides the operating rod 7 to mesh the gear 8 with the other two sets of racks 4, thereby facilitating the driving of the other two sets of racks 4 to extend from the through hole 6;
[0037] After fixing the fusion device body 1, the staff rotates the mounting rod 2 to separate the mounting rod 2 from the fusion device body 1. Then, the staff can remove the mounting rod 2 and the operating rod 7 from the patient's body.
[0038] After the staff takes out the mounting rod 2 and the operating rod 7, they implant bones into the fusion device body 1 to increase the fusion rate, and increase the mechanical properties by setting the negative Poisson's ratio layer 3, thereby achieving a better fusion induction effect.
[0039] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not limitations on the present invention. The specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and purpose of the present invention, but as long as they are within the scope of the claims of the present invention, they are protected by patent law.
Claims
1. A gear-supported self-stabilizing intervertebral fusion device for lumbar lateral vertebrae, comprising a fusion device body (1) and a mounting rod (2), characterized in that: The outer surface of the fusion device body (1) is connected to a negative Poisson's ratio layer (3), and a through hole (6) is provided on one side of the outer surface of the fusion device body (1) and the negative Poisson's ratio layer (3), the through hole (6) is connected to a rack (4), and a puncture head (10) is fixed to one end of the rack (4), and a barb (11) is provided on one side of the puncture head (10), and a slot (5) is provided at the bottom of the fusion device body (1); the outer surface of the mounting rod (2) is sleeved with a joystick (7), and the outer surface of the joystick (7) is sleeved with a gear (8).
2. The gear-distracted self-stabilizing intervertebral fusion cage for lumbar lateral fusion according to claim 1, characterized in that: The negative Poisson's ratio layer (3) is made by 3D printing of titanium alloy powder.
3. The gear-distracted self-stabilizing intervertebral fusion cage for lumbar lateral fusion according to claim 1, characterized in that: The rack (4), through hole (6), puncture head (10) and barb (11) are all provided in four groups, and the four groups of racks (4) are all meshed with the gear (8).
4. The gear-distracted self-stabilizing intervertebral fusion cage for lumbar lateral fusion according to claim 1, characterized in that: The mounting rod (2) is threadedly connected to the fusion device body (1).
5. The gear-distracted self-stabilizing intervertebral fusion cage for lumbar lateral fusion according to claim 3, characterized in that: The diameter of the slot (5) is greater than the diameter of the gear (8).
6. The gear-distracted self-stabilizing intervertebral fusion cage for lateral lumbar spine according to claim 4, characterized in that: The operating rod (7) is slidably connected to the mounting rod (2).
7. The gear-distracted self-stabilizing intervertebral fusion cage for lateral lumbar spine according to claim 3, characterized in that: The racks (4) are slidably connected to the through holes (6), and the four groups of racks (4) are mirror-imaged.
8. The gear-distracted self-stabilizing intervertebral fusion cage for lateral lumbar spine according to claim 1, characterized in that: A plurality of protrusions (9) are provided below the outer surface of the joystick (7), and the plurality of protrusions (9) are distributed in a ring array.