A spinal bone grafting device

Abstract

This utility model relates to the field of spinal bone grafting technology and proposes a spinal bone grafting device, including a storage tube with a feeding hopper on its exterior. A connecting pipe is fixedly connected to the top of the storage tube, and a conveying pipe is fixedly connected to the bottom. Sliding grooves are formed on both sides of the inner cavity of the connecting pipe. Sliding rods are slidably connected inside each of the two sliding grooves. A bearing seat is fixedly connected between the two sliding rods. A lead screw is provided inside the bearing seat, and a knob is fixedly connected to the top of the lead screw. A support plate is fixedly connected inside the connecting tube, and two fixing rods are fixedly connected to the bottom of the bearing seat. This technical solution solves the problem in existing technologies where implanted bone materials may be of varying sizes, irregular shapes, or have excessively rough surfaces, which increases friction and resistance during the conveying process, leading to blockage of the conveying port.

Description

Technical Field

[0001] This utility model relates to the field of spinal bone grafting technology, specifically to a spinal bone grafting device. Background Technology

[0002] Most burst fractures of the thoracic and lumbar vertebrae require open reduction and pedicle screw fixation. However, in severe burst fractures, bone defects often appear in the vertebral body after reduction. During clinical follow-up, it was found that eggshell-like cavities often form in the fractured vertebral body, indicating nonunion of the vertebral fracture. Therefore, for patients with severe burst fractures of the thoracic and lumbar vertebrae, in order to improve the fracture healing rate, allogeneic bone or artificial bone is often implanted through the pedicle to promote fracture healing.

[0003] Patent specification CN216294227U discloses a spinal bone grafting device for multidirectional bone grafting, including a storage cylinder. The storage cylinder has a conveying mechanism inside. The conveying mechanism includes a threaded cylinder, a lead screw, a connecting block, a limiting block, a fixing block, and a fixing cylinder. The lead screw is threadedly connected to the threaded cylinder. The fixing block is fixedly connected to the surface of the fixing cylinder. The lead screw is rotatably connected to the fixing block through a bearing. The limiting block is fixedly connected to the surface of the threaded cylinder. A limiting groove is formed on the surface of the fixing cylinder. The limiting block is slidably connected to the limiting groove. The connecting block is fixedly connected to the bottom of the threaded cylinder.

[0004] However, during the implementation of the relevant technology, the following problems were found in the above technical solution: the above device is prone to being blocked by aggregates during use. In actual use, the size of the aggregates is different, the shape is irregular, or the surface of the aggregates is too rough, which may increase the friction and resistance during the conveying process, thereby causing blockage of the conveying port. Therefore, further improvements are needed. Utility Model Content

[0005] This invention proposes a spinal bone grafting device, which solves the problem in related technologies where the implanted bone material may be of different sizes, irregular shapes, or have excessively rough surfaces, thereby increasing friction and resistance during the material conveying process and leading to blockage of the material inlet.

[0006] The technical solution of this utility model is as follows:

[0007] A spinal bone grafting device includes a storage tube with a feeding hopper on its exterior. A connecting pipe is fixedly connected to the top of the storage tube, and a conveying pipe is fixedly connected to the bottom of the storage tube. Sliding grooves are formed on both sides of the inner cavity of the connecting pipe. Sliding rods are slidably connected inside each of the two sliding grooves. A bearing seat is fixedly connected between the two sliding rods. A lead screw is provided inside the bearing seat. A knob is fixedly connected to the top of the lead screw. A support plate is fixedly connected inside the connecting tube. Two fixing rods are fixedly connected to the bottom of the bearing seat. A stop plate is slidably connected inside the storage tube. A rotating rod is fixedly connected to the bottom of the lead screw, and a helical blade is fixedly connected to the outside of the rotating rod.

[0008] Preferably, the bearing housing and the lead screw are connected by a ball nut pair, and the support plate and the bottom end of the lead screw are connected by a bearing.

[0009] Preferably, the lead screw extends to the top of the connecting pipe, and the lead screw and the connecting pipe are connected by a bearing.

[0010] Preferably, the bottom ends of both fixed rods are fixedly connected to the top of the abutment, and the outside of the rotating rod is in contact with the inside of the abutment.

[0011] Preferably, a connecting rod is fixedly connected to the bottom end of the rotating rod, and multiple fixing plates are fixedly connected to the bottom of the conveying pipe.

[0012] Preferably, the bottom of the storage tube is also fixedly connected to multiple fixed seats, and an arc-shaped plate is movably connected inside the fixed seat via a rotating shaft.

[0013] Preferably, the arc-shaped plate is in contact with the connecting rod, and a spring is fixedly connected to one side of the arc-shaped plate.

[0014] Preferably, one end of the spring is fixedly connected to the fixing plate, and the plurality of arc-shaped plates are arranged in a circumferential distribution.

[0015] The working principle and beneficial effects of this utility model are as follows:

[0016] 1. In this utility model, the conveyed aggregate is agitated by the rotation of the spiral blades. The agitation effect of the spiral blades at the conveying pipe inlet ensures that the aggregate is evenly distributed during the conveying process, avoiding the accumulation or blockage of aggregate at the conveying inlet. This solves the problem that the implanted aggregate may be of different sizes, irregular shapes, or have excessively rough surfaces, which would increase the friction and resistance during the conveying process and lead to blockage of the conveying inlet.

[0017] 2. In this utility model, the continuous rotation of the connecting rod causes multiple arc-shaped plates to vibrate continuously. The vibration of the arc-shaped plates can make the bone material fit more tightly in the bone graft area, increase the contact area and bonding force between the bone material and the surrounding tissue, help reduce the risk of loosening and displacement after bone grafting, and thus improve the stability of bone grafting. Attached Figure Description

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a cross-sectional schematic diagram of the overall structure of this utility model;

[0021] Figure 3 This utility model Figure 2 Enlarged view of point A in the image;

[0022] Figure 4 This is a schematic diagram showing a partial structure of the present invention;

[0023] Figure 5 This utility model Figure 4 Enlarged view of point B in the image.

[0024] In the diagram: 1. Storage pipe; 2. Feed hopper; 3. Connecting pipe; 4. Conveying pipe; 5. Sliding groove; 6. Sliding rod; 7. Bearing seat; 8. Lead screw; 9. Knob; 10. Support plate; 11. Fixing rod; 12. Support plate; 13. Rotating rod; 14. Spiral blade; 15. Connecting rod; 16. Fixing plate; 17. Fixing seat; 18. Arc plate; 19. Spring. Detailed Implementation

[0025] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0026] Example 1

[0027] like Figures 1-3As shown, this embodiment proposes a spinal bone grafting device, including a storage tube 1, a feeding hopper 2 on the outside of the storage tube 1, a connecting tube 3 fixedly connected to the top of the storage tube 1, a conveying tube 4 fixedly connected to the bottom of the storage tube 1, sliding grooves 5 on both sides of the inner cavity of the connecting tube 3, sliding rods 6 slidably connected inside the two sliding grooves 5, a bearing seat 7 fixedly connected between the two sliding rods 6, a lead screw 8 inside the bearing seat 7, a knob 9 fixedly connected to the top of the lead screw 8, a support plate 10 fixedly connected inside the connecting tube 3, two fixing rods 11 fixedly connected to the bottom of the bearing seat 7, a stop plate 12 slidably connected inside the storage tube 1, a rotating rod 13 fixedly connected to the bottom of the lead screw 8, and a spiral blade 14 fixedly connected to the outside of the rotating rod 13.

[0028] In this embodiment, the bearing housing 7 and the lead screw 8 are connected by a ball nut pair, and the support plate 10 and the bottom end of the lead screw 8 are connected by a bearing, which facilitates the rotation of the lead screw 8 while driving the bearing housing 7 to move.

[0029] In this embodiment, the lead screw 8 extends to the top of the connecting pipe 3, and the lead screw 8 and the connecting pipe 3 are connected by a bearing, which makes it easy to rotate the knob 9 while driving the lead screw 8 to rotate.

[0030] In this embodiment, the bottom ends of the two fixed rods 11 are fixedly connected to the top of the abutment plate 12, and the outside of the rotating rod 13 is in contact with the inside of the abutment plate 12, which facilitates the abutment plate 12 to rise and fall along the outside of the rotating rod 13.

[0031] During use, medical staff first select an appropriate incision location to expose the lamina, spinous processes, and facet joints of the spine, according to the needs of the surgery. Then, the bone particles to be implanted are placed into the storage tube 1 through the feed hopper 2. Then, the knob 9 is turned clockwise. As the knob 9 turns, the lead screw 8 turns, which in turn moves the bearing seat 7 downward. As the bearing seat 7 moves downward, the two fixing rods 11 move downward, which in turn moves the abutment plate 12 downward. As the abutment plate 12 moves downward, it evenly delivers the bone material to the site requiring bone grafting through the conveying tube 4. At the same time, the turn of the lead screw 8 also drives the rotating rod 13 to turn, which in turn drives the spiral blade 14 to turn. As the spiral blade 14 turns, it agitates the delivered bone material. Through the agitation of the spiral blade 14 at the conveying port of the conveying tube 4, it can be ensured that the bone material is evenly distributed during the conveying process, avoiding the accumulation or blockage of bone material at the conveying port.

[0032] Example 2

[0033] like Figures 4-5As shown, based on the same concept as Embodiment 1 above, this embodiment also proposes that the bottom end of the rotating rod 13 is fixedly connected to a connecting rod 15, and the bottom of the conveying pipe 4 is fixedly connected to multiple fixing plates 16.

[0034] In this embodiment, a plurality of fixed seats 17 are fixedly connected to the bottom of the storage tube 1. An arc plate 18 is movably connected inside the fixed seat 17 through a rotating shaft, which allows the arc plate 18 to rotate when subjected to force.

[0035] In this embodiment, the arc plate 18 is in contact with the connecting rod 15, and a spring 19 is fixedly connected to one side of the arc plate 18, which facilitates the connecting rod 15 to drive the arc plate 18 to rotate.

[0036] In this embodiment, one end of the spring 19 is fixedly connected to the fixed plate 16, and multiple arc-shaped plates 18 are arranged in a circumferential pattern, which facilitates the rotation of the arc-shaped plates 18 while driving the spring 19 to extend and retract.

[0037] In use, the rotation of knob 9 drives the lead screw 8 to rotate, which in turn drives the rotating rod 13 to rotate, which in turn drives the connecting rod 15 to rotate. When the connecting rod 15 rotates to contact the arc plate 18, the arc plate 18 will rotate under force and cause the spring 19 to extend. When the connecting rod 15 drives the arc plate 18 to rotate until the contact with itself disappears, the spring 19 will contract and drive the arc plate 18 to return to its original position. At this time, the arc plate 18 will vibrate due to inertia and the action of the spring 19, which will cause the implanted bone material to vibrate. As the connecting rod 15 continues to rotate, it will cause multiple arc plates 18 to vibrate continuously. Through the vibration of the arc plates 18, the bone material can be more tightly attached to the bone graft area, increasing the contact area and bonding force between the bone material and the surrounding tissue, which helps to reduce the risk of loosening and displacement after bone grafting, thereby improving the stability of bone grafting.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A spinal bone grafting device, comprising a storage tube (1), characterized in that, The storage pipe (1) is provided with a feeding hopper (2) on the outside. The top of the storage pipe (1) is fixedly connected to a connecting pipe (3). The bottom of the storage pipe (1) is fixedly connected to a conveying pipe (4). The inner walls of the connecting pipe (3) are provided with sliding grooves (5). The two sliding grooves (5) are slidably connected to sliding rods (6). The two sliding rods (6) are fixedly connected to a bearing seat (7). The bearing seat (7) is provided with a lead screw (8). The top of the lead screw (8) is fixedly connected to a knob (9). The connecting pipe (3) is fixedly connected to a support plate (10). The bottom of the bearing seat (7) is fixedly connected to two fixing rods (11). The storage pipe (1) is slidably connected to a stop plate (12). The bottom of the lead screw (8) is fixedly connected to a rotating rod (13). The rotating rod (13) is fixedly connected to a spiral blade (14).

2. The spinal bone grafting device according to claim 1, characterized in that, The bearing housing (7) is connected to the lead screw (8) by a ball nut pair, and the support plate (10) is connected to the bottom end of the lead screw (8) by a bearing.

3. The spinal bone grafting device according to claim 1, characterized in that, The lead screw (8) extends to the top of the connecting pipe (3), and the lead screw (8) and the connecting pipe (3) are connected by a bearing.

4. The spinal bone grafting device according to claim 1, characterized in that, The bottom ends of the two fixed rods (11) are fixedly connected to the top of the abutment plate (12), and the outside of the rotating rod (13) is in contact with the inside of the abutment plate (12).

5. A spinal bone grafting device according to claim 4, characterized in that, The bottom end of the rotating rod (13) is fixedly connected to a connecting rod (15), and the bottom of the conveying pipe (4) is fixedly connected to multiple fixing plates (16).

6. A spinal bone grafting device according to claim 5, characterized in that, The bottom of the storage pipe (1) is also fixedly connected to a plurality of fixed seats (17), and an arc plate (18) is movably connected inside the fixed seat (17) through a rotating shaft.

7. A spinal bone grafting device according to claim 6, characterized in that, The arc-shaped plate (18) is in contact with the connecting rod (15), and a spring (19) is fixedly connected to one side of the arc-shaped plate (18).

8. A spinal bone grafting device according to claim 7, characterized in that, One end of the spring (19) is fixedly connected to the fixing plate (16), and the plurality of arc plates (18) are arranged in a circumferential shape.

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