Medical porous tantalum intervertebral fusion cage

Abstract

The utility model discloses a medical porous tantalum interbody fusion cage, the utility model relates to interbody fusion cage technical field, including the fusion cage main part, be provided with porous structure part on the fusion cage main part, the left side of the front end of fusion cage main part is connected with the upper screw of oblique upwards, the right side of the front end of fusion cage main part is connected with the lower screw of oblique downwards, and the upper screw and lower screw reach the upper and lower sides of fusion cage main part respectively, the front side of both ends of fusion cage main part all is provided with fixed groove, through setting fixed groove, it is convenient to be equipped with fixed screw by the space of fixed groove and the help of tool rotation loading, make fixed screw hit into the vertebra on the upper and lower sides of fusion cage main part contact, compared with prior art, can improve the stability between fusion cage main part and vertebra, avoid appearing the phenomenon that fusion cage main part shifts before fusion cage main part and vertebra fuse, thereby convenient vertebra and fusion cage main part better combination.

Description

Technical Field

[0001] This utility model relates to the field of interbody fusion device technology, specifically a medical porous tantalum interbody fusion device. Background Technology

[0002] An intervertebral fusion device is a spinal surgical medical device consisting of a fusion device body and accessory screws. It is surgically implanted into the intervertebral space and is mainly used to treat problems such as intervertebral disc herniation, spinal degenerative diseases, and vertebral slippage.

[0003] CN218010080U discloses a porous tantalum intervertebral fusion device for medical use, which includes two solid ends, with connecting rods at the four corners between the two solid ends, and a bone graft cavity cover in the middle between the two solid ends. The bone graft cavity cover has multiple first through holes, and multiple first reinforcing rods are provided between the connecting rods and the bone graft cavity cover. Multiple second reinforcing rods are provided between two adjacent connecting rods. A porous structure is provided in the gap between the connecting rods and the bone graft cavity cover. The porous structure includes multiple interconnected columnar bodies, each with an internal cavity. Multiple second through holes are provided at equal intervals on the sides of the columnar bodies. This prior art, through the porous structure, provides an open growth space for effective bone growth, which is more conducive to the integration of the fusion device into the intervertebral space.

[0004] Currently, postoperative displacement of intervertebral fusion cages is not uncommon in clinical practice, which can lead to serious complications. Displacement can also affect bone healing in the intervertebral space, causing fusion surgery to fail. The existing technology only has instrument holes and cannot stably connect the fusion cage to the vertebra, resulting in low stability of the fusion cage and vertebra before fusion. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a medical porous tantalum interbody fusion device, which solves the problems existing in the prior art.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a medical porous tantalum interbody fusion device, comprising a fusion device body, wherein the fusion device body is provided with a porous structure, an upwardly inclined upper screw is connected to the left front end of the fusion device body, and a downwardly inclined lower screw is connected to the right front end of the fusion device body, wherein the upper screw and the lower screw extend to the upper and lower sides of the fusion device body respectively.

[0007] The front sides of both ends of the fusion device body are provided with fixing grooves, and fixing screws are connected to the top and bottom sides of the fixing grooves. The opposite sides of the upper and lower fixing screws are provided with spindle holes, and the sides of the upper and lower fixing screws that are far apart from each other extend to the upper and lower sides of the fusion device body respectively.

[0008] A support and reinforcement component is provided between the upper and lower fixing screws.

[0009] Preferably, the outer wall of the fixing screw is connected to a bearing seat, the bearing seat is provided with a slider, the slider is slidably connected to a slide rail provided on the fusion body, each fixing groove is provided with two slide rails, and the opposite sides of the upper and lower slide rails do not contact each other.

[0010] Preferably, the outer wall of the bearing housing is uniformly provided with semi-circular grooves.

[0011] Preferably, the support and reinforcement assembly includes a first insert block inserted into the bottom spindle hole, a connecting rod provided at the top of the first insert block, a second insert block inserted into the top spindle hole, a movable rod provided at the bottom of the second insert block, a connecting screw provided between the movable rod and the connecting rod, and the connecting screw fixes the movable rod and the connecting rod in the front-back direction.

[0012] Preferably, the movable rod is provided with a sliding rod, and the connecting rod is provided with a sliding groove that is slidably connected to the sliding rod.

[0013] Preferably, the fusion unit body is provided with weight reduction holes.

[0014] This invention provides a porous tantalum interbody fusion device for medical use. Compared with the prior art, it has the following advantages:

[0015] 1. This medical porous tantalum interbody fusion cage, by setting a fixing groove, facilitates the insertion of fixing screws by rotating them up and down with the help of tools through the space of the fixing groove, so that the fixing screws are driven into the vertebrae that contact the upper and lower sides of the fusion cage body. Compared with the existing technology, it can improve the stability between the fusion cage body and the vertebrae, and avoid the phenomenon of displacement of the fusion cage body before the fusion cage body and the vertebrae fuse, thereby facilitating better integration of the vertebrae and the fusion cage body.

[0016] 2. This medical porous tantalum intervertebral fusion device, by setting bearing seats, sliders and slide rails, can be inserted into the spindle hole by the spindle of a micro motor, and then move along the slide rail, thereby guiding the rotating fixation screw, making it easier to drive the fixation screw into the vertebra.

[0017] 3. This medical porous tantalum interbody fusion device uses insert block one, insert block two, connecting rod and movable rod respectively between the upper and lower fixing screws. The connecting screw fixes the movable rod and connecting rod, so that the upper and lower fixing screws will not move to the opposite side, improving the stability of the fixing screws. It can also support the fixing groove, avoiding the problem of deformation of the fixing groove due to the compression of the vertebra after the fixing groove is opened in the main body of the fusion device. Attached Figure Description

[0018] Figure 1 This is a first-view schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a second-view schematic diagram of the overall structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the fixing screw, spindle hole, bearing seat and slide bar of this utility model;

[0021] Figure 4 This is a schematic diagram of the support and reinforcement component of this utility model.

[0022] In the diagram: 1. Fusion unit body; 2. Porous structure; 3. Upper screw; 4. Lower screw; 5. Fixing groove; 6. Fixing screw; 7. Main shaft hole; 8. Bearing seat; 9. Slider; 10. Slide rail; 11. Semicircular groove; 12. Insert block one; 13. Connecting rod; 14. Insert block two; 15. Movable rod; 16. Connecting screw; 17. Slide rod; 18. Slide groove; 19. Weight reduction hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] See Figures 1-4 This utility model provides the following two technical solutions:

[0025] First embodiment: A medical porous tantalum interbody fusion device includes a fusion device body 1, a porous structure part 2 is provided on the fusion device body 1, the porous structure part 2 facilitates fusion with the vertebral bone, an upwardly inclined upper screw 3 is connected to the left front end of the fusion device body 1, and a downwardly inclined lower screw 4 is connected to the right front end of the fusion device body 1, and the upper screw 3 and the lower screw 4 extend to the upper and lower sides of the fusion device body 1 respectively for insertion into the vertebral bone.

[0026] The front sides of both ends of the fusion device body 1 are provided with fixing grooves 5. Fixing screws 6 are connected to the top and bottom sides of the fixing grooves 5. The opposite sides of the upper and lower fixing screws 6 are provided with spindle holes 7. The sides of the upper and lower fixing screws 6 that are far apart from each other extend to the upper and lower sides of the fusion device body 1. By picking up the micro motor and inserting it into the fixing groove 5, the spindle is inserted into the spindle hole 7. The micro motor can be moved to make the fixing screws 6 rotate and connect to the fixing groove 5, and finally drive into the vertebra. Compared with the existing technology that only sets the upper screw 3 and the lower screw 4, it can improve the stability between the fusion device body 1 and the vertebra. It can avoid the phenomenon of displacement of the fusion device body 1 before the fusion device body 1 and the vertebra fuse, thus facilitating better integration between the vertebra and the fusion device body 1.

[0027] Because the fixing groove 5 is set, it is prone to deformation and collapse due to the compression of the vertebrae. Therefore, a support and reinforcement component is set between the upper and lower fixing screws 6 to support the fixing groove 5 and reinforce the upper and lower fixing screws 6.

[0028] The outer wall of the fixing screw 6 is connected to a bearing seat 8, and a slider 9 is provided on the bearing seat 8. The slider 9 is slidably connected to the slide rail 10 provided on the fusion body 1. Each fixing groove 5 is provided with two slide rails 10, and the opposite sides of the upper and lower slide rails 10 do not contact each other, which makes it easy to install the slider 9 into the slide rail 10. When the fixing screw 6 rotates, it passes through the bearing seat 8 without obstruction, and when it is rotated and installed, it can also be guided by the slider 9 and the slide rail 10.

[0029] The outer wall of the bearing seat 8 is evenly provided with semi-circular grooves 11, which can improve the anti-slip effect and make it easier to use tools to clamp the bearing seat 8 so that the slider 9 can be installed into the slide rail 10.

[0030] The support and reinforcement assembly includes a first insert 12 inserted into the bottom spindle hole 7. A connecting rod 13 is provided on the top of the first insert 12. A second insert 14 is inserted into the top spindle hole 7. A movable rod 15 is provided at the bottom of the second insert 14. A connecting screw 16 is provided between the movable rod 15 and the connecting rod 13. The connecting screw 16 fixes the movable rod 15 and the connecting rod 13 in the front-back direction. In this way, the connecting screw 16 can be rotated and installed in the same way as the upper screw 3 and the lower screw 4, so that the upper and lower fixing screws 6 will not move, thereby supporting the fixing groove 5.

[0031] The movable rod 15 is provided with a sliding rod 17, and the connecting rod 13 is provided with a sliding groove 18 that is slidably connected to the sliding rod 17, so that the sliding rod 17 on the movable rod 15 can slide along the sliding groove 18 on the connecting rod 13.

[0032] The second implementation method differs from the first implementation method in that the fusion body 1 is provided with weight reduction holes 19, which can reduce the use of materials and save costs.

[0033] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0034] In use, the fusion device body 1 is installed on the vertebra. Using a tool, the upper screw 3 and lower screw 4 are rotated and driven into the vertebra. Then, the bearing seat 8 is clamped with a tool, allowing the slider 9 to enter the slide rail 10. Next, the spindle of the micro motor is inserted into the spindle hole 7 with a tool, thus turning on the micro motor and moving it, causing the fixing screw 6 to rotate and move. Guided by the slide rail 10, it is driven vertically into the vertebra through the space at the fixing groove 5, improving the stability of the vertebra and the fusion device body 1. Finally, the first insert block 12 is installed, and then the second insert block 14 is moved upward, allowing the movable rod 15 to slide upward on the connecting rod 13 until it can no longer move. At this point, the connecting screw 16 is installed with a tool. At this time, the upper and lower fixing screws 6 are supported and reinforced by the support and reinforcement components, which can not only prevent the fixing groove 5 from being deformed by the vertebra compression, but also improve the stability of the fixing screw 6.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A medical porous tantalum interbody fusion device, characterized in that: The device includes a fusion body (1), on which a porous structure (2) is provided. An upwardly inclined upper screw (3) is connected to the left front end of the fusion body (1), and a downwardly inclined lower screw (4) is connected to the right front end of the fusion body (1). The upper screw (3) and the lower screw (4) extend to the upper and lower sides of the fusion body (1), respectively. The front sides of both ends of the fusion body (1) are provided with fixing grooves (5), and fixing screws (6) are connected to the top and bottom sides of the fixing grooves (5). The opposite sides of the upper and lower fixing screws (6) are provided with spindle holes (7), and the sides of the upper and lower fixing screws (6) that are far apart from each other extend to the upper and lower sides of the fusion body (1). A support and reinforcement assembly is provided between the upper and lower fixing screws (6).

2. The medical porous tantalum interbody fusion device according to claim 1, characterized in that: The outer wall of the fixing screw (6) is connected to a bearing seat (8), and a slider (9) is provided on the bearing seat (8). The slider (9) is slidably connected to the slide rail (10) provided on the fusion body (1). Each fixing groove (5) is provided with two slide rails (10), and the opposite sides of the upper and lower slide rails (10) do not contact each other.

3. The medical porous tantalum interbody fusion device according to claim 2, characterized in that: The outer wall of the bearing housing (8) is uniformly provided with semi-circular grooves (11).

4. The medical porous tantalum interbody fusion device according to claim 1, characterized in that: The support and reinforcement assembly includes a first insert (12) inserted into the bottom spindle hole (7), a connecting rod (13) is provided on the top of the first insert (12), a second insert (14) is inserted into the top spindle hole (7), a movable rod (15) is provided at the bottom of the second insert (14), a connecting screw (16) is provided between the movable rod (15) and the connecting rod (13), and the connecting screw (16) fixes the movable rod (15) and the connecting rod (13) in the front-back direction.

5. A medical porous tantalum interbody fusion device according to claim 4, characterized in that: The movable rod (15) is provided with a sliding rod (17), and the connecting rod (13) is provided with a sliding groove (18) that is slidably connected to the sliding rod (17).

6. The medical porous tantalum interbody fusion device according to claim 1, characterized in that: The fusion device body (1) is provided with weight reduction holes (19).

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