Intervertebral quantitative bone grafting device

Abstract

The utility model discloses an intervertebral quantitative bone grafting device which comprises a bone grafting tube and a push rod, a feeding cavity is arranged in the bone grafting tube, and the top of the bone grafting tube is fixedly connected with a funnel. Broken bone grains are fed into the feeding cavity from the funnel, the push rod is used for driving the push block to compact, and the distance between the bottom surface of the push block and the bottom of the bone grafting pipe can be determined according to the second scale mark on the outer wall of the push rod after compaction, so that the bone grafting amount can be easily calculated according to the size of the inner cavity of the feeding cavity of the bone grafting pipe, and the total volume of the bone grains in the pipeline can be quantified; and quantitative bone grafting in the intervertebral space can be realized. The sliding sleeve can slide up and down on the outer wall of the bone grafting tube by loosening the hand screw, the limiting distance can be confirmed according to the first scale line, the bone grafting tube is fed into the opened intervertebral space after the distance is confirmed, the insertion depth of the bone grafting tube can be limited through the limiting plate, and safety is improved. The feeding cavity of the bone grafting tube is designed to be rectangular, the bone grafting tube can be rotated by 90 degrees to open the intervertebral space after being placed into the intervertebral space, bone grafting under the state that the intervertebral space is opened is achieved, and the intervertebral bone grafting amount is increased.

Description

Technical Field

[0001] This utility model relates to the field of posterior lumbar decompression and bone grafting fusion technology, and in particular to a quantitative intervertebral bone graft device. Background Technology

[0002] Posterior lumbar decompression and fusion is currently the most commonly used surgical procedure for treating severe lumbar degenerative diseases. Intraoperative interbody fusion can increase the interbody fusion rate, improve lumbar stability, and enhance surgical efficacy. Currently, interbody fusion mainly employs two methods: manual bone grafting and bone grafting devices. Given individual differences in patient body type and intervertebral height, the amount of bone grafted during surgery should vary. However, both of these methods have the drawback of not being able to accurately control the amount of bone grafted. The amount of bone grafted during surgery depends entirely on the surgeon's experience. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a quantitative intervertebral bone graft device.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: an intervertebral quantitative bone graft device, including a bone graft tube and a push rod. The bone graft tube has a feeding chamber that runs vertically through it. A funnel for convenient feeding of crushed bone material is fixedly connected to the top of the bone graft tube. The bottom of the funnel communicates with the feeding chamber. A limiting structure for limiting the depth of insertion of the bone graft tube into the intervertebral space is slidably connected to the outer wall of the bone graft tube. A first scale structure for convenient confirmation of the limiting distance of the limiting structure is also provided on the front wall of the bone graft tube. The push rod is slidably connected to the inner wall of the feeding chamber. A handle for convenient gripping is fixedly connected to the top of the push rod. A push block is detachably connected to the lower wall of the push rod. A second scale structure for confirming the depth of insertion of the push block into the feeding chamber is provided on the front wall of the push rod.

[0005] As a further description of the above technical solution:

[0006] The feeding chamber is rectangular in plan view, and the inner dimensions of the rectangular feeding chamber are any one of 8X6mm, 8X10mm, and 8X12mm.

[0007] As a further description of the above technical solution:

[0008] The limiting structure includes a sliding sleeve and a limiting plate. The sliding sleeve and the limiting plate are slidably connected to the outer wall of the bone graft tube in an upper and lower arrangement, and the lower end of the sliding sleeve is fixedly connected to the upper wall of the limiting plate.

[0009] As a further description of the above technical solution:

[0010] The sliding sleeve and the bone graft tube are locked together by hand-tightening screws.

[0011] As a further description of the above technical solution:

[0012] The first scale structure is the first scale line, which is located on the anterior wall of the bone graft tube.

[0013] As a further description of the above technical solution:

[0014] The second scale structure is the second scale line, which is located on the front wall of the push rod.

[0015] This utility model has the following beneficial effects:

[0016] 1. Compared with existing technologies, this intervertebral quantitative bone graft device allows bone fragments to be fed into the feeding chamber of the bone graft tube through a funnel. A pusher rod drives a pusher block for compaction. After compaction, the distance between the bottom of the pusher block and the bottom of the bone graft tube can be determined by the second scale line on the outer wall of the pusher rod. Therefore, the amount of bone graft can be easily calculated based on the dimensions of the feeding chamber of the bone graft tube, quantifying the total volume of bone fragments within the tube and achieving more efficient bone grafting. Intraoperative application of this bone graft device enables quantitative bone grafting and achieves more efficient bone grafting.

[0017] 2. Compared with existing technologies, this intervertebral quantitative bone graft device allows the sliding sleeve to slide up and down on the outer wall of the bone graft tube by loosening the hand screw. The limiting distance can be confirmed according to the first scale line. After confirming the distance, it is inserted into the open intervertebral space. The insertion depth of the bone graft tube can be limited by the limiting plate, thereby improving safety.

[0018] 3. Compared with existing technologies, this intervertebral quantitative bone graft device features a rectangular bone graft tube feeding chamber with internal dimensions of 8X6mm, 8X10mm, and 8X12mm. After the bone graft tube is inserted into the intervertebral space, it can be rotated 90 degrees to open the intervertebral space, enabling bone grafting while the intervertebral space is open, thereby increasing the amount of bone grafted. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the intervertebral quantitative bone graft device proposed in this utility model.

[0020] Figure 2 This is a schematic diagram of the push rod and push block connection structure of the intervertebral quantitative bone graft device proposed in this utility model.

[0021] Figure 3 This is a partial top view structural diagram of the bone graft tube of the intervertebral quantitative bone graft device proposed in this utility model.

[0022] Legend:

[0023] 1. Bone graft tube; 2. Funnel; 3. Push rod; 4. Handle; 5. Sliding sleeve; 6. Limiting plate; 7. Hand screw; 8. First scale line; 9. Second scale line; 10. Push block; 11. Feeding chamber. Detailed Implementation

[0024] 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.

[0025] Reference Figures 1 to 3 The intervertebral quantitative bone graft device provided by this utility model includes a bone graft tube 1 and a push rod 3. The bone graft tube 1 has a vertically penetrating feeding chamber 11. The feeding chamber 11 is rectangular in top view. The inner dimensions of the rectangular feeding chamber 11 are any one of 8X6mm, 8X10mm, and 8X12mm. The feeding chamber 11 with the three inner dimensions can be selected according to the total amount of filler required and the required intervertebral space opening height. The total volume of bone material can be easily calculated from the rectangular inner cavity. After the bone graft tube is inserted into the intervertebral space, the intervertebral space can be opened by rotating it 90 degrees, so as to realize bone grafting in the open intervertebral space and increase the amount of bone grafted.

[0026] like Figure 1 As shown, in order to better feed the crushed aggregate, the top of the bone graft tube 1 is fixedly connected to a funnel 2 for convenient feeding of the crushed aggregate. The bottom of the funnel 2 is connected to the feeding chamber 11, and the aggregate with implantation is fed into the feeding chamber 11 through the funnel 2.

[0027] like Figure 1 As shown, in order to control the insertion depth of the bone graft tube 1 into the expanded intervertebral space, a limiting structure for restricting the insertion depth of the bone graft tube 1 into the intervertebral space is slidably connected to the outer wall of the bone graft tube 1. The limiting structure includes a sliding sleeve 5 and a limiting plate 6. The sliding sleeve 5 and the limiting plate 6 are slidably connected to the outer wall of the bone graft tube 1 in an upper and lower distribution, and the lower end of the sliding sleeve 5 is fixedly connected to the upper wall of the limiting plate 6. The sliding sleeve 5 and the bone graft tube 1 are locked together by a hand-tightening screw 7. After the hand-tightening screw 7 is loosened, the sliding sleeve 5 and the limiting plate 6 can slide up and down on the outer wall of the bone graft tube 1. When the bone graft tube 1 is inserted into the intervertebral space, the insertion depth can be controlled by the limiting plate 6.

[0028] like Figure 1 As shown, in order to better confirm the distance limited by the limiting plate 6, the anterior wall of the bone graft tube 1 is also provided with a first scale structure for convenient confirmation of the limiting distance of the limiting structure. The first scale structure is the first scale line 8, which is set on the anterior wall of the bone graft tube 1. The distance between the limiting plate 6 and the bottom of the bone graft tube 1 can be seen intuitively through the scale aligned with the first scale line 8 on the lower wall of the limiting plate 6, that is, the depth of the bone graft tube 1 inserted into the intervertebral space.

[0029] like Figure 1 , Figure 2As shown, in order to obtain the total volume of the aggregate after the crushed aggregate is fed into the intervertebral space and compacted, the push rod 3 is slidably connected to the inner wall of the feeding chamber 11. The top of the push rod 3 is fixedly connected to a handle 4 for easy gripping. The lower wall of the push rod 3 is detachably connected to a push block 10. The front wall of the push rod 3 is provided with a second scale structure for confirming the depth of the push block 10 inserted into the feeding chamber 11. The second scale structure is a second scale line 9. The second scale line 9 is set on the front wall of the push rod 3. The push block 10 is detachably connected so that the push block 10 matching the inner size of the feeding chamber 11 can be replaced according to the different sizes of the feeding chamber 11. After the push block 10 compacts the aggregate, the scale value of the second scale line 9 at the connection between the bone graft tube 1 and the funnel 2 can reflect the filling height of the crushed aggregate. The volume of the aggregate filling can be easily calculated according to the inner size of the feeding chamber 11.

[0030] Working principle: The rectangular inner cavity of the feeding chamber 11 has any one of the following dimensions: 8X6mm, 8X10mm, and 8X12mm. The feeding chamber 11 with the three inner cavity dimensions can be selected according to the total requirements of the filler. The rectangular inner cavity makes it easy to calculate the total volume of the aggregate. After the bone graft tube is inserted into the intervertebral space, the intervertebral space can be opened by rotating it 90 degrees, so as to realize bone grafting in the open state of the intervertebral space and increase the amount of bone graft in the intervertebral space. The bottom of the funnel 2 is connected to the feeding chamber 11. The bone material with implantation is fed into the feeding chamber 11 through the funnel 2. After loosening the hand screw 7, the sliding sleeve 5 and the limiting plate 6 can slide up and down on the outer wall of the bone graft tube 1. When the bone graft tube 1 is inserted into the intervertebral space, the insertion depth can be controlled by the limiting plate 6. The distance between the limiting plate 6 and the bottom of the bone graft tube 1 can be seen intuitively by the scale aligned with the first scale line 8 on the lower wall of the limiting plate 6, that is, the depth of the bone graft tube 1 inserted into the intervertebral space. The push block 10 is detachably connected so that the push block 10 can be replaced with one that matches the inner size of the feeding chamber 11 according to the different sizes of the feeding chamber 11. After the push block 10 compacts the bone material, the scale value of the second scale line 9 at the connection between the bone graft tube 1 and the funnel 2 can reflect the filling height of the crushed bone material. The volume of bone material filling can be easily calculated according to the inner size of the feeding chamber 11.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An intervertebral quantitative bone grafting device, characterized by: The application relates to a bone grafting tube (1) and a push rod (3), the bone grafting tube (1) is internally provided with a feeding cavity (11) penetrating from top to bottom, a funnel (2) for conveniently feeding bone fragments is fixedly connected to the top of the bone grafting tube (1), the bottom of the funnel (2) is communicated with the feeding cavity (11), a limiting structure for limiting the insertion depth of the bone grafting tube (1) into an intervertebral gap is slidably connected to the outer wall of the bone grafting tube (1), a first scale structure for conveniently confirming the limiting distance of the limiting structure is further arranged on the front wall of the bone grafting tube (1), the push rod (3) is slidably connected to the inner side wall of the feeding cavity (11), a handle (4) for conveniently holding is fixedly connected to the top of the push rod (3), a push block (10) is detachably connected to the lower wall of the push rod (3), and a second scale structure for confirming the insertion depth of the push block (10) into the feeding cavity (11) is arranged on the front wall of the push rod (3).

2. The interbody quantitative bone graft device of claim 1, wherein: The feeding cavity (11) is projected as a rectangle in plan view, and the size of the rectangular inner cavity of the feeding cavity (11) is any one of 8X6 mm, 8X10 mm and 8X12 mm.

3. The interbody quantitative bone graft device of claim 2, wherein: The limiting structure comprises a sliding sleeve (5) and a limiting plate (6), the sliding sleeve (5) and the limiting plate (6) are sequentially and slidably connected to the outer wall of the bone grafting tube (1) in a top-to-bottom distribution mode, and the lower end of the sliding sleeve (5) is fixedly connected with the upper wall of the limiting plate (6).

4. The interbody quantitative bone graft device of claim 3, wherein: The sliding sleeve (5) and the bone grafting tube (1) are locked through a hand screw (7).

5. The interbody quantitative bone graft device of claim 4, wherein: The first scale structure is a first scale line (8), and the first scale line (8) is arranged on the front wall of the bone grafting tube (1).

6. The interbody quantitative bone graft device of claim 5, wherein: The second scale structure is a second scale line (9), and the second scale line (9) is arranged on the front wall of the push rod (3).

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